CN119070837A

CN119070837A - RF module, communication system, receiver sensitivity optimization method and device

Info

Publication number: CN119070837A
Application number: CN202310641828.4A
Authority: CN
Inventors: 徐悦
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2024-12-03

Abstract

The present application provides a method and device for optimizing the sensitivity of a radio frequency module, a communication system, and a receiver, including: a first switch element, a low-pass filter, a second switch element, and a first low-noise amplifier, wherein the first switch element is used to output multiple carrier signals when a target auxiliary carrier signal exists among multiple carrier signals received by the radio frequency module; the low-pass filter is used to filter the main carrier signal among the multiple carrier signals to obtain at least one auxiliary carrier signal; the second switch element is used to output at least one auxiliary carrier signal; the first low-noise amplifier is used to amplify the target auxiliary carrier signal among the at least one auxiliary carrier signal to obtain the target auxiliary carrier signal. In this way, a low-pass path is set on the radio frequency module, which is used to receive the target auxiliary carrier signal when the target auxiliary carrier signal exists among the multiple carrier signals received, thereby improving the sensitivity of the receiver corresponding to the target auxiliary carrier signal.

Description

Radio frequency module, communication system, and receiver sensitivity optimization method and device

Technical Field

The present application belongs to the field of communications technologies, and in particular, to a method, an apparatus, and a terminal for optimizing sensitivity of a radio frequency module, a communication system, and a receiver.

Background

Frequency division duplexing (frequency division duplexing, FDD) is one communication mode used in mobile communication systems. In the FDD mode, the radio frequency modules can use different frequencies for signal transmission at the same time. In order to ensure that the receiver and the transmitter in the radio frequency module can work normally at the same time, a duplexer is required to be integrated in the radio frequency module so as to isolate a transmitting signal from a receiving signal, and prevent the transmitting signal of the transmitter from being transmitted to the receiver, thereby causing interference to the receiver.

Currently, in order to increase the transmission rate, carrier aggregation (Carrier Aggregation, CA) technology is proposed. Thus, the terminal is required to include a radio frequency module supporting the transceiving CA to transceive CA. It should be understood that for a radio frequency module supporting transception CA, it is also possible to support transception non-CA, i.e. single carrier signals. In the case of the fdd+transmit/receive non-CA mode, a duplexer is necessarily used to isolate the transmitted single carrier signal from the received single carrier signal. Therefore, currently, in order to support two scenarios of transmit-receive CA and transmit-receive non-CA, a duplexer is necessarily used in the radio frequency module.

However, since the insertion loss of the diplexer in the rf module is relatively large, the sensitivity of each receiver is affected by the diplexer no matter whether the rf module is used for receiving CA or not.

Disclosure of Invention

The embodiment of the application provides a radio frequency module, a communication system, a receiver sensitivity optimization method, a receiver sensitivity optimization device and a terminal, which can improve the sensitivity of a receiver corresponding to a target auxiliary carrier signal.

In a first aspect, an embodiment of the present application provides a radio frequency module, which includes a first switching element, a low-pass filter, a second switching element and a first low-noise amplifier, where the first switching element includes a first end and a second end, the second end includes a first pin, the second switching element includes a third end and a fourth end, the third end includes a second pin, the fourth end includes a third pin, the first end is electrically connected to an antenna, the first pin is electrically connected to an input end of the low-pass filter, an output end of the low-pass filter is electrically connected to the second pin, the third pin is electrically connected to the first low-noise amplifier, the first switching element is configured to output a plurality of carrier signals when the plurality of carrier signals received by the radio frequency module have a target auxiliary carrier signal, where the plurality of carrier signals include a main carrier signal and the target auxiliary carrier signal, the low-pass filter is configured to electrically connect to the antenna, the first pin is electrically connected to an input end of the low-pass filter, the output end of the low-pass filter is electrically connected to the second pin, the third pin is electrically connected to the first low-noise amplifier, and the first switching element is configured to output the plurality of carrier signals when the plurality of carrier signals received by the radio frequency module have the target auxiliary carrier signals, the low-noise signal, the first carrier signal is processed by the first carrier signal, the auxiliary signal is at least one of the first carrier signal.

In this way, a low-pass channel is arranged on the radio frequency module, so that the radio frequency module is used for receiving the target auxiliary carrier signal under the condition that a plurality of received carrier signals exist the target auxiliary carrier signal, and the sensitivity of a receiver corresponding to the target auxiliary carrier signal is improved.

In an implementation manner, the radio frequency module comprises a transceiver serial port and an LNA serial port, wherein the first pin is electrically connected with the transceiver serial port, the transceiver serial port is electrically connected with the input end of the low-pass filter, the output end of the low-pass filter is electrically connected with the LNA serial port, and the LNA serial port is electrically connected with the second pin.

Therefore, when the radio frequency module is a chip, the transceiver serial port and the LNA serial port reserved on the chip can be utilized to externally arrange the low-pass filter, so that the original circuit structure on the chip is not required to be changed.

It should be understood that, when the rf module is a chip, a low-pass may be provided in the chip to save PCB area.

In one implementation manner, the second end of the first switching element further includes at least one fourth pin, the radio frequency module further includes at least one duplexer, the first end of the at least one duplexer group is electrically connected to the fourth pin, and the second end of the at least one duplexer group is electrically connected to the second pin.

In one implementation manner, the radio frequency module further includes at least one second low noise amplifier connected in parallel with the first low noise amplifier, where the first low noise amplifier and the at least one second low noise amplifier are respectively used for amplifying carrier signals in different frequency sub-bands.

In this way, the first end of the duplexer and the second end of the duplexer may form a first path, and the first switching element, the first path in each duplexer, the second switching element and each LNA may form a plurality of duplexer receiving paths connected in parallel in the radio frequency module. The plurality of parallel diplexer receive paths may be configured to receive other ones of the plurality of carrier signals that do not meet the target carrier signal.

In one implementation manner, the radio frequency module further includes a third switch and at least one power amplifier, the third switch includes a fifth end and a sixth end, the fifth end includes at least one fifth pin, the sixth end includes at least one sixth pin, the third end of the at least one duplexer group is electrically connected with the fifth pin, and the output end of the at least one power amplifier is electrically connected with the sixth pin.

In this way, the third end of the diplexer may form a second path, and the first switching element, the second path in each diplexer, the third switching element, and each PA may form a plurality of parallel diplexer transmit paths in the rf module. In this way, the radio frequency module can support FDD mode.

In one implementation, the target secondary carrier signal is a secondary carrier signal that meets a preset condition that includes a frequency band of the secondary carrier signal being lower than a frequency band of the primary carrier signal.

In one implementation, the preset conditions further include at least one of:

the Reference Signal Received Power (RSRP) of the auxiliary carrier signal is lower than an RSRP threshold;

the error rate of the auxiliary carrier signal is lower than the error rate threshold value;

The auxiliary carrier signal is different from the radio frequency module corresponding to the main carrier signal.

In this way, whether the received multiple carrier signals comprise the target auxiliary carrier signals conforming to the walk-through path can be determined, and if the multiple carrier signals comprise the target auxiliary carrier signals conforming to the walk-through path, the received multiple carrier signals are processed through the newly added low-pass path to obtain the target auxiliary carrier signals. The low-pass filter can filter the main carrier signal with higher frequency band from the plurality of carrier signals.

In a second aspect, the present application provides a communication system comprising a first radio frequency module, the first radio frequency module being a radio frequency module as claimed in any one of the first aspects.

In one implementation manner, the communication system further includes a second radio frequency module, and the frequency band of the carrier signal received by the second radio frequency module is higher than the frequency band of the carrier signal received by the first radio frequency module.

In one implementation manner, the communication system further includes a third radio frequency module, and a frequency band of a carrier signal received by the third radio frequency module is higher than a frequency band of a carrier signal received by the second radio frequency module.

In an implementation manner, the second rf module is an rf module as set forth in any one of the first aspects.

In one implementation manner, the first radio frequency module is configured to receive and transmit a low frequency carrier signal, the second radio frequency module is configured to receive and transmit a medium and high frequency carrier signal, and the third radio frequency module is configured to receive and transmit a sub6G carrier signal.

In a third aspect, the present application provides a chip comprising a radio frequency module as claimed in any one of the first aspects or a communication system as claimed in any one of the second aspects.

In a fourth aspect, the present application provides a method for optimizing receiver sensitivity, where the method is applied to the communication system according to any one of the second aspects, and the method includes determining a communication scenario of the communication system, determining a frequency band of a multi-carrier signal in downlink carrier aggregation if the communication scenario is downlink carrier aggregation, the plurality of carrier signals including a main carrier signal and at least one auxiliary carrier signal, determining an alternative auxiliary carrier signal from the at least one auxiliary carrier signal based on a preset condition, where the preset condition includes that the frequency band of the auxiliary carrier signal is lower than the frequency band of the main carrier signal, determining that the alternative auxiliary carrier signal is a target auxiliary carrier signal if the number of the alternative auxiliary carrier signals is one, determining a first low noise amplifier corresponding to the target auxiliary carrier signal based on a sub-frequency band of the target auxiliary carrier signal, sequentially inputting a low-pass filter and the first low noise amplifier to the plurality of carrier signals, filtering the main carrier signal and amplifying the auxiliary carrier signal, and processing the target carrier signal.

In this way, by determining whether the downlink carrier aggregation scene includes the candidate auxiliary carrier signals meeting the preset conditions, if the downlink carrier aggregation scene includes the candidate auxiliary carrier signals meeting the preset conditions, the target auxiliary carrier signals are selected from the candidate auxiliary carrier signals, and then the target auxiliary carrier signals are received through the low-pass channel, so that the sensitivity of the receiver corresponding to the target auxiliary carrier signals can be improved.

In an implementation manner, when the number of the alternative auxiliary carrier signals is multiple, the method further comprises determining a radio frequency module corresponding to each alternative auxiliary carrier signal based on the frequency range of each alternative auxiliary carrier signal, selecting one alternative auxiliary carrier signal from the multiple alternative auxiliary carrier signals as a target auxiliary carrier signal when the radio frequency modules corresponding to each alternative auxiliary carrier signal are the same radio frequency module, and selecting one alternative auxiliary carrier signal from the alternative auxiliary carrier signals as a target auxiliary carrier signal when the radio frequency modules corresponding to each alternative auxiliary carrier signal comprise multiple different radio frequency modules.

Thus, when the radio frequency module corresponding to the alternative auxiliary carrier signal comprises a plurality of different radio frequency modules, each different radio frequency module can correspondingly select one target carrier signal, and thus, the sensitivity of the receiver corresponding to the plurality of target auxiliary carrier signals can be improved.

In one implementation, the method further comprises obtaining a signal quality parameter of the at least one secondary carrier signal, and the preset condition further comprises that the signal quality parameter of the secondary carrier signal is lower than a signal quality parameter threshold.

In one implementation, the signal quality parameters include RSRP and/or bit error rate.

Since for a secondary carrier signal with good signal quality, the quality of the secondary carrier signal received by the receiver will also be good. Therefore, in this case, it is not meaningful to skip the duplexer reception path and the pass-low path. In this way, the receiving path and the low-pass path of the duplexer can be skipped for the auxiliary carrier signal with poor signal quality, thereby improving the sensitivity of the corresponding receiver.

In an implementation manner, the method further comprises determining the at least one auxiliary carrier signal and the radio frequency module corresponding to the main carrier signal, and the preset condition further comprises that the radio frequency module corresponding to the auxiliary carrier signal and the radio frequency module corresponding to the main carrier signal are two different radio frequency modules.

Therefore, the isolation between the determined target auxiliary carrier signal and the main carrier signal can be ensured, so that the target auxiliary carrier signal is not interfered by the main carrier signal as much as possible.

In one implementation manner, the frequency band of the target auxiliary carrier signal is low frequency, the frequency band of the main carrier signal is medium-high frequency or sub6G, or the frequency band of the target auxiliary carrier signal is medium-high frequency, and the frequency band of the main carrier signal is sub6G.

In a fifth aspect, the present application provides an apparatus for optimizing receiver sensitivity, the apparatus comprising:

A communication scene determining module, configured to determine a communication scene of the communication system;

the system comprises a frequency band determining module, a frequency band determining module and a frequency-division multiplexing module, wherein the frequency band determining module is used for determining the frequency band of a multi-carrier signal in downlink carrier aggregation when the communication scene is the downlink carrier aggregation;

The device comprises an alternative auxiliary carrier signal determining module, a main carrier signal determining module and a secondary carrier signal determining module, wherein the alternative auxiliary carrier signal determining module is used for determining an alternative auxiliary carrier signal from the at least one auxiliary carrier signal based on preset conditions, and the preset conditions comprise that the frequency band of the auxiliary carrier signal is lower than that of the main carrier signal;

the target auxiliary carrier signal determining module is used for determining the alternative auxiliary carrier signal as a target auxiliary carrier signal under the condition that the number of the alternative auxiliary carrier signals is one;

A first low noise amplifier determining module, configured to determine a first low noise amplifier corresponding to the target auxiliary carrier signal based on a sub-band of the target auxiliary carrier signal;

the control module is used for controlling the plurality of carrier signals to be sequentially input into the low-pass filter and the first low-noise amplifier, carrying out filtering processing on the main carrier signal in the plurality of carrier signals, and carrying out amplification processing on the target auxiliary carrier signal to obtain the target auxiliary carrier signal.

In a sixth aspect, the present application provides a terminal comprising a communication system as claimed in any of the second aspects and/or an apparatus as claimed in the fifth aspect.

In a seventh aspect, the present application provides a computer readable storage medium having stored therein a computer program or instructions which, when run on a computer, cause the computer to perform the method according to any of the fourth aspects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a communication scene diagram provided by an embodiment of the present application;

fig. 2 is a scene diagram of a DLCA according to an embodiment of the application;

Fig. 3 is a circuit diagram of a radio frequency module according to an embodiment of the present application;

fig. 4 is a circuit diagram of a radio frequency module with a low-pass added according to an embodiment of the present application;

FIG. 5 is a circuit diagram of a radio frequency module with a low-pass added according to an embodiment of the present application;

Fig. 6 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG. 7 is a schematic diagram of yet another communication system according to an embodiment of the present application;

fig. 8 is a schematic diagram of yet another communication system according to an embodiment of the present application;

fig. 9 is a flowchart of a method for improving sensitivity of a receiver according to an embodiment of the present application;

fig. 10 is an exemplary diagram of CA signal processing provided in an embodiment of the present application;

FIG. 11 is a diagram illustrating yet another example of CA signal processing provided by an embodiment of the present application;

Fig. 12 is a simulation diagram of insertion loss of a receiving path of a duplexer according to an embodiment of the present application;

fig. 13 is a simulation diagram of insertion loss of a low-pass path according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 15 is a block diagram of a receiver sensitivity enhancing apparatus according to an embodiment of the present application.

Detailed Description

For ease of understanding, some technical terms related to the embodiments of the present application will be described first.

1. Frequency division duplexing (frequency division duplexing, FDD) is a communication mode used in mobile communication systems. In the FDD mode, the radio frequency modules can use different frequencies for signal transmission at the same time. In order to ensure that the receiver and the transmitter in the radio frequency module can work normally at the same time, a duplexer is generally integrated in the radio frequency module to isolate a transmitting signal from a receiving signal, so that the transmitting signal of the transmitter is prevented from being transmitted to the receiver, and interference is avoided to the receiver.

2. Carrier aggregation (Carrier Aggregation, CA) long term evolution (Long Term Evolution, LTE) system with a maximum bandwidth of 20Mhz. For an enhanced long term evolution (LTE-Advanced, LTE-A) system, the peak rate of the LTE-A system is greatly improved compared with that of the LTE system, and the LTE-A system is required to reach 1Gbps downlink and 500Mbps uplink. Clearly, a bandwidth of 20Mhz has failed to meet this requirement. In order to enable the LTE-a system to meet the requirements, the 3GPP defines CA technology in release 10, i.e. multiple carriers within the same frequency band or between different frequency bands are aggregated together to form a larger bandwidth, and a User Equipment (UE) is served at the same time when needed to provide a required rate. Through CA, the resource utilization rate can be maximized, and discrete spectrum resources can be effectively utilized.

The CA includes a plurality of carrier signals, and the plurality of carrier signals may be from a plurality of frequency sub-bands of the same base station, or from a plurality of frequency sub-bands of different base stations. The plurality of carrier signals are in turn configured as a primary carrier signal (Primary Component Carrier, PCC) and a secondary carrier signal (Secondary Component Carrier, SCC). Wherein the number of PCCs is one, and the number of SCCs may be one or more.

CA is further divided into downlink carrier aggregation (DLCA) and uplink carrier aggregation (up LINK CARRIER aggregation, ULCA).

In DLCA, the PCC is responsible for maintaining and controlling the overall system connections, and other secondary component carriers (e.g., SCCs) are built on top of the PCC. The receiver and transmitter of the PCC operate to ensure that the primary data streams and control signals are normally transmitted, thereby providing a stable communication service. In DLCA the receiver of the SCC is active and the transmitter is inactive, the SCC being used to increase the overall bandwidth and data transmission capacity.

Fig. 1 is a communication scene diagram provided by the embodiment of the present application, and fig. 2 is a scene diagram of a DLCA provided by an embodiment of the present application.

As shown in fig. 1, the base station 200 transmits CA to the terminal 100, which is called DLCA, and the terminal 100 transmits CA to the base station 200, which is called ULCA.

As shown in fig. 2, the terminal 100 includes a communication system 300 supporting transceiving CA, and the communication system 300 may include one or more radio frequency modules 400. Wherein, different rf modules 400 can be used to transmit and receive signals in different frequency bands. For example, the communication system includes two rf modules 400, where the two rf modules 400 are respectively used for receiving and transmitting low frequency signals and medium and high frequency signals, or the two rf modules 400 are respectively used for receiving and transmitting medium and high frequency signals and sub6G, or the two rf modules 400 are respectively used for receiving and transmitting low frequency signals and sub6G. For another example, the communication system 300 includes three rf modules 400, and the three rf modules 400 are respectively configured to transmit and receive low frequency signals, medium and high frequency signals, and sub6G. The rf module 400 for receiving and transmitting low frequency signals may be referred to as LB-LPAMID, the rf module 400 for receiving and transmitting medium and high frequency signals may be referred to as MHB-LPAMID, and the rf module 400 for receiving and transmitting sub6G signals may be referred to as sub6G-LPAMID.

It should be noted that, the frequency band division is not limited in the embodiment of the present application. Generally, a frequency band ranging from 700 megahertz (MHz) to 900MHz is referred to as a low frequency, a frequency band ranging from 1.7 gigahertz (GHz) to 2.7GHz is referred to as a medium-high frequency, and a frequency band ranging from 3.3GHz to 4.2GHz is referred to as a sub6G, and sub3G includes a low frequency and a medium-high frequency. Wherein sub3G and sub6G belong to 5G frequency bands.

It should also be noted that each frequency band may include a plurality of sub-frequency bands. For example, the low frequency includes sub-bands of B5, B8, B26, B20, etc., and the medium and high frequency includes sub-bands of B1, B3, B7, etc. Wherein, the downlink frequency range corresponding to B5 is 869MHz-894MHz, the downlink frequency range corresponding to B8 is 925MHz-960 MHz, the downlink frequency range corresponding to B20 is 790 MHz-8235 MHz, the downlink frequency range corresponding to B26 is 855MHz-890 MHz, the downlink frequency range corresponding to B1 is 2.11GHz-2.17GHz, the downlink frequency range corresponding to B3 is 1.805GHz-1.880GHz, and the downlink frequency range corresponding to B7 is 2.62GHz-2.69GHz.

Illustratively, as shown in fig. 2, in the DLCA scenario, the base station 200 transmits a CA to the terminal 100, e.g., the CA includes one PCC and one SCC. The communication system 300 in the terminal 100 includes two rf modules 400, namely a mid-high frequency rf module MHB-LPAMID and a low frequency rf module LB-LPAMID. The MHB-LPAMID receives and transmits the medium-high frequency signal through a first antenna Ant1, and the LB-LPAMID receives and transmits the low frequency signal through a second antenna Ant 2.

After the terminal 100 receives the CA, the terminal 100 (e.g., modem) may demodulate the sub-bands corresponding to the carrier signals in the CA, and the types of the carrier signals (i.e., the primary carrier and the secondary carrier). For example, in fig. 2, after receiving the CA, the terminal 100 may demodulate that the CA includes two carrier signals PCC and SCC, where the sub-band of the PCC is B1, the sub-band of the SCC is B5, B1 belongs to the middle-high band MHB, and B5 belongs to the low frequency signal. Thus, CA is input to MHB-LPAMID and LB-LPAMID, respectively. The received CA is then processed through MHB-LPAMID and LB-LPAMID, respectively, to obtain PCC and SCC, respectively.

Fig. 3 is a circuit diagram of a radio frequency module 400 according to an embodiment of the application. As shown in fig. 3, the radio frequency module 400 includes a first switching element 401, a second switching element 402, a third switching element 403, a duplexer group 404, a low noise amplifier group 405, and a power amplifier group 406.

Wherein the first switching element 401 may be a single pole, multi throw switch. The first switching element 401 includes a first terminal and a second terminal. The first end includes one pin for electrical connection with the antenna 407 and the second end includes a plurality of pins (which may be referred to as fourth pins in embodiments of the present application) for electrical connection with the diplexer group 404.

The second switching element 402 may be a multiple pole, multiple throw switch. The second switching element 402 includes a third terminal and a fourth terminal. The third terminal may include at least one pin (which may be referred to as a second pin in an embodiment of the present application) for electrical connection with the diplexer group 404 and the fourth terminal may also include at least one pin (which may be referred to as a third pin in an embodiment of the present application) for electrical connection with the low noise amplifier group 405.

The third switching element 403 may also be a multi-pole multi-throw switch. The third switching element 403 comprises a fifth terminal and a sixth terminal. The fifth terminal may include at least one pin (which may be referred to as a fifth pin in an embodiment of the present application) for electrically connecting with the diplexer group 404, and the sixth terminal may also include at least one pin (which may be referred to as a sixth pin in an embodiment of the present application) for electrically connecting with the power amplifier group 406.

The diplexer group 404 includes a plurality of diplexers, each of which has two filters integrated therein, one for filtering the received carrier signal and the other for filtering the transmitted carrier signal. Different diplexers are used to filter carrier signals of different sub-bands. For example, for a low frequency rf module, three diplexers, diplexer 404a, diplexer 404b and diplexer 404c may be included. The duplexer 404a is used for filtering the carrier signal with the sub-band of B5, the duplexer 404B is used for filtering the carrier signal with the sub-band of B8, and the duplexer 404a is used for filtering the carrier signal with the sub-band of B20.

The low noise amplifier group 405 includes a plurality of low noise amplifiers (low noise amplifier, LNAs), and different LNAs are used for amplifying carrier signals of different sub-bands to obtain carrier signals of corresponding sub-bands. The number of LNAs in low noise amplifier bank 405 may be the same as the number of diplexers in diplexer bank 404, and each LNA in low noise amplifier bank 405 corresponds one-to-one with each diplexer in diplexer bank 404. For example, low noise amplifier bank 405 includes three LNAs, LNA1, LNA2, and LNA3, respectively. The LNA1 is used for amplifying the carrier signal with the sub-band of B5, the LNA2 is used for amplifying the carrier signal with the sub-band of B8, and the LNA3 is used for amplifying the carrier signal with the sub-band of B20. That is, LNA1 corresponds to duplexer 404a, LNA2 corresponds to duplexer 404b, and LNA3 corresponds to duplexer 404 c. Where each LNA corresponds to one receiver RX, e.g., LNA1 corresponds to RX1, LNA2 corresponds to RX2, and LNA3 corresponds to RX 3.

The power amplifier group 406 includes a plurality of power amplifiers PA, and different PAs are used for amplifying the carrier signals of different sub-bands, so as to transmit the carrier signals through the antenna 407. The number of PAs in the power amplifier bank 406 may be the same as the number of diplexers in the diplexer bank 404, and each PA in the power amplifier bank 406 corresponds one-to-one with each diplexer in the diplexer bank 404. For example, the power amplifier group 406 includes three PAs, PA1, PA2, and PA3, respectively. The PA1 is used for amplifying the power of the carrier signal with the sub-band of B5, the PA2 is used for amplifying the power of the carrier signal with the sub-band of B8, and the PA3 is used for amplifying the power of the carrier signal with the sub-band of B20. That is, PA1 corresponds to the duplexer 404a, PA2 corresponds to the duplexer 404b, and PA3 corresponds to the duplexer 404 c. Where each PA corresponds to one transmitter TX, e.g., PA1 corresponds to transmitter TX1, PA2 corresponds to transmitter TX2, and PA3 corresponds to transmitter TX 3.

The connection relationship between the elements in the rf module 400 is that the first end of the first switching element 401 is used for electrically connecting with the antenna 407, the fourth pins in the second end of the first switching element 401 are respectively electrically connected with the first ends of the diplexers, the second ends of the diplexers are respectively electrically connected with the second pins in the third end of the second switching element 402, the third pins in the fourth end of the second switching element 402 are electrically connected with the input ends of the LNAs, and the output ends of the LNAs are respectively electrically connected with the corresponding LNAs. The third end of each duplexer is electrically connected with each fifth pin in the fifth end of the third switching element one by one, each sixth pin in the sixth end of the third switching element is electrically connected with the output end of each PA one by one, and the input end of each PA is electrically connected with the corresponding machine.

It is understood that the first end of the diplexer and the second end of the diplexer may form a first path and the first end of the diplexer and the third end of the diplexer may form a second path. Wherein the first path is used for filtering the received carrier signal and the second path is used for filtering the transmitted carrier signal. In this way, the first switching element 401, the first path in each duplexer, the second switching element 402, and each LNA may form a plurality of parallel duplexer receiving paths in the radio frequency module 400. The first switching element, the second path in each diplexer, the third switching element, and each PA may form a plurality of diplexer transmit paths in parallel at the rf module 400.

In this way, CA may be input to a duplexer corresponding to each sub-band of the carrier signal in CA, and output to a corresponding LNA, respectively, to receive carrier signals of a plurality of sub-bands, respectively. Illustratively, the CA includes a PCC with a sub-band of B5 and an SCC with a sub-band of B8. In this way, the first terminal of the first switching element 401 can be controlled to be respectively turned on with the first terminals of the diplexer 404a and the diplexer 404b, and the second terminal of the diplexer 404a is turned on with the LNA1, and the second terminal of the diplexer 404b is turned on with the LNA 2. Thus, LNA1 may output PCC and LNA2 may output SCC. Further, the PCC is input to the corresponding receiver RX1 and the SCC is input to the corresponding receiver RX2.

In transmitting CA, the third terminal of the duplexer 404a may be controlled to be in conduction with PA1, the third terminal of the duplexer 404b may be controlled to be in conduction with PA2, and the first terminal of the first switching element 401 may be respectively in conduction with the first terminals of the duplexer 404a and the duplexer 404 b. Thus, carrier signals of sub-bands B5 and B8 can be output through the first switching element 401.

The radio frequency module supporting the CA can also support the non-CA, i.e., single carrier signal. In addition, in the case of transmitting and receiving a single carrier signal in the FDD mode, a duplexer is necessarily used to isolate the transmitted single carrier signal from the received single carrier signal. Therefore, currently, in order to support both the CA and non-CA scenarios, a duplexer is necessarily used in the rf module.

However, the use of the diplexer affects the receiver sensitivity because the insertion loss of the diplexer in the rf module is relatively large. That is, regardless of whether the radio frequency module shown in fig. 3 is used to receive CA or non-CA, the sensitivity of each receiver is affected by the duplexer.

The sensitivity of the receiver is an important indicator for measuring the weak signal receiving capability of the radio frequency module. The higher the receiver sensitivity, the stronger the radio frequency module is capable of receiving weak signals. Receiver sensitivity refers to the lowest signal strength that the receiver can receive and still function properly, and the receiver sensitivity satisfies the following relation (1):

sensitivity=-174+NF+10logB+10 logSNR (1)

where sensitivity represents receiver sensitivity, NF is the noise figure of the receiver, B is the signal bandwidth of the receiver, and SNR is the demodulation signal-to-noise ratio.

The physical meaning of NF is the ratio of the output signal-to-noise ratio to the input signal-to-noise ratio after passing through the low noise amplifier. The insertion loss of the receiver is a degradation amount of the signal-to-noise ratio, and therefore, in the case where both B and SNR are fixed, the sensitivity is about a fixed value-the insertion loss.

It follows that the greater the insertion loss, the poorer the sensitivity of the receiver.

In order to solve the problem that the sensitivity of each receiver is poor due to the use of the duplexer in the radio frequency module, the embodiment of the application provides a scheme for improving the sensitivity of the receiver. According to the scheme, a low-pass path formed by a low-pass filter is added in the radio frequency module shown in fig. 3, and when a target SCC meeting preset conditions exists in a received CA, the target SCC can be controlled to skip a corresponding duplexer, so that the low-pass path is selected. In this way, since the insertion loss of the low-pass filter is smaller than that of the duplexer, the scheme can improve the sensitivity of the receiver corresponding to the target SCC.

The following describes improvement of a hardware structure in a scheme for improving sensitivity of a receiver provided by an embodiment of the present application.

Fig. 4 is a circuit diagram of a radio frequency module according to an embodiment of the present application. As shown in fig. 4, a low pass filter 408 is added to the rf module shown in fig. 3.

As shown in fig. 4, an input terminal of the low-pass filter 408 is electrically connected to one pin (which may be referred to as a first pin in the embodiment of the present application) of the second terminal of the first switching element 401, and an output terminal of the low-pass filter 408 is electrically connected to the low-noise amplifier group through the second switching element 402. Specifically, the output terminal of the low-pass filter 408 is electrically connected to a second pin of the third terminal of the second switching element 402. In this way, the output of the low pass filter 408 may be electrically connected to any LNA of the low noise amplifier bank 405 through the second switching element 402. That is, according to the scheme for improving the sensitivity of the receiver provided by the embodiment of the application, a path of low-pass channels connected in parallel with the receiving channels of the diplexers is added to the radio frequency module 400.

In some embodiments, when the rf module is a chip, the transceiver serial port 409 and the LNA serial port 410 reserved on the chip may be utilized to externally provide the low-pass filter 408, so that the original circuit structure on the chip is not required to be changed. Illustratively, as shown in fig. 4, a first pin of the first switching element 401 is electrically connected to a transceiver serial port 409, the transceiver serial port 409 is electrically connected to an input of the low-pass filter 408, an output of the low-pass filter 408 is electrically connected to an LNA serial port 410, and the LNA serial port 410 is electrically connected to one of the second pins of the third terminal of the second switching element 402.

In some embodiments, when the rf module is a chip, a low-pass channel may be provided inside the chip to save PCB area. Illustratively, as shown in FIG. 5, a low pass filter 408 is electrically connected directly between the first pin and the second pin.

After the low-pass path is added to the rf module 400, the first switching element 401 is configured to output a plurality of carrier signals to the low-pass filter 408 when the target SCC exists in the plurality of carrier signals received by the rf module 400. The low pass filter 408 is configured to filter PCC signals of the plurality of carrier signals to obtain at least one SCC, where the at least one SCC includes a target SCC. The second switching element 402 is used to output at least one SCC. And the first low noise amplifier in the low noise amplifier group 405 is configured to amplify a sub-band corresponding to the target SCC in the at least one SCC, so as to obtain the target SCC. The first low noise amplifier refers to a low noise amplifier corresponding to a sub-band of the target SCC. For example, the target SCC is an SCC with a sub-band of B5, the first low noise amplifier is LNA1 for amplifying a sub-band of B5, and for example, the target SCC is an SCC with a sub-band of B8, the first low noise amplifier is LNA2 for amplifying a sub-band of B8, the target SCC is an SCC with a sub-band of B20, and the first low noise amplifier is LNA3 for amplifying a sub-band of B20.

Thus, when the target SCC exists in the received multiple carrier signals, the receiving of the target SCC can skip the original duplexer receiving path, and the newly added low-pass path is adopted, so that the sensitivity of the receiver corresponding to the target SCC is improved.

For other carrier signals that do not meet the low-pass condition, the corresponding duplexer receiving path is still passed.

It should be further noted that, except for the newly added low-pass channel in the rf module 400 shown in fig. 4 and fig. 5, other rf modules are the same as the rf module 400 shown in fig. 3, and specific reference may be made to the description about the rf module 400 in fig. 3, which is not repeated here.

It should be further noted that, in the embodiment of the present application, only the rf module shown in fig. 3 is used for illustration, and the limitation of the circuit structure of the rf module is not shown. The radio frequency module can be any radio frequency module supporting the reception of CA.

The embodiment of the present application further provides a communication system 300, where the communication system 300 may include the radio frequency module 400 shown in fig. 4.

In some implementations, as shown in fig. 6, the communication system 300 may include a first rf module 400a and a second rf module 400b, where the first rf module 400a is the rf module shown in fig. 4 or fig. 5, and the second rf module 400b is the rf module shown in fig. 3. And the frequency band of the signal received by the first rf module 400a is lower than the frequency band of the signal received by the second rf module 400 b. For example, the first rf module 400a is configured to receive and transmit low frequency signals (i.e., the first rf module 400a is LB-LPAMID), and the second rf module 400b is configured to receive and transmit medium-high frequency or sub6G signals (i.e., the second rf module 400b is MHB-LPAMID or sub 6G-LPAMID). For another example, the first rf module 400a is configured to transmit and receive a medium-high frequency signal, and the second rf module 400b is configured to transmit and receive a sub6G signal.

In some embodiments, as shown in fig. 7, the communication system 300 may include a first rf module 400a, a second rf module 400b, and a third rf module 400c. The first rf module 400a and the third rf module 400c are the rf modules shown in fig. 4 or fig. 5, and the second rf module 400b is the rf module shown in fig. 3. The frequency bands of the first rf module 400a and the third rf module 400c transmit and receive signals are lower than the frequency band of the second rf module 400 b. For example, the first rf module 400a is configured to receive and transmit low frequency signals (i.e., the first rf module 400a is LB-LPAMID), the third rf module 400c is configured to receive and transmit medium and high frequency signals (i.e., the third rf module 400c is MHB-LPAMID), and the second rf module 400b is configured to receive and transmit sub6G signals (i.e., the second rf module 400b is sub 6G-LPAMID). For another example, the first rf module 400a and the third rf module 400c are both configured to transmit and receive low frequency signals, and the second rf module 400b is configured to transmit and receive medium-high frequency signals or sub6G signals.

In some embodiments, as shown in fig. 8, the communication system 300 may include a first rf module 400a, a second rf module 400b, and a third rf module 400c, where the first rf module 400a is the rf module shown in fig. 4 or fig. 5, and the second rf module 400b and the third rf module 400c are the rf modules shown in fig. 3. The frequency band of the signal received by the first rf module 400a is lower than the frequency band of the signal received by the second rf module 400b and lower than the frequency band of the signal received by the third rf module 400 c. For example, the first rf module 400a is configured to receive and transmit low frequency signals (i.e. the first rf module 400a is LB-LPAMID), the second rf module 400b is configured to receive and transmit medium-high frequency signals or sub6G signals (i.e. the second rf module 400b is MHB-LPAMID or sub 6G-LPAMID), and the third rf module 400c is configured to receive and transmit medium-high frequency signals or sub6G signals.

In this way, when the target SCC satisfying the preset condition exists in the received multiple carrier signals, the communication system 300 provided by the embodiment of the present application may skip the duplexer receiving path corresponding to the target SCC, and process the target SCC signal by using the newly added low-pass path, so as to obtain the target SCC. In this way, the sensitivity of the receiver corresponding to the target SCC can be improved.

The method for improving the sensitivity of the receiver is mainly used for determining whether the received CA comprises the target SCC conforming to the walk-low path or not, and if the CA comprises the target SCC conforming to the walk-low path, the received CA is processed through the newly added low-pass path to obtain the target SCC.

Fig. 9 is a flowchart of a method for improving sensitivity of a receiver according to an embodiment of the present application. As shown in fig. 9, the method may include the steps of:

Step 501, determining a communication scenario of the communication system 300.

It should be noted that the duplexer in the rf module is used to filter out the clutter in the received rf signal. The noise is mainly generated by the interference of the transmitting signal to the receiving signal in the same transceiving path. The second aspect is to receive signals of other sub-bands mixed in the signal, for example, the received CA includes signals of a plurality of sub-bands, and a signal of a specific sub-band can be obtained by processing the signals through the diplexer.

Secondly, in the DLCA scenario, for the SCCs, all the SCCs operate corresponding to the receiver, and all the transmitters corresponding to the SCCs do not operate. For PCC, the receiver and transmitter corresponding to the PCC operate simultaneously.

Therefore, in the DLCA scenario, since the transmitters corresponding to the SCCs do not operate, each SCC is not interfered by the transmission signal in the same transmission/reception path. In this case, for the SCC with the frequency band lower than the PCC, the receiving path of the duplexer in the radio frequency module may be skipped and the low-pass path may be changed, so that the PCC may be filtered out by the low-pass path with smaller insertion loss to obtain the SCC, thereby providing the sensitivity of the receiver corresponding to the SCC.

Based on the above analysis, the method for improving the sensitivity of the receiver provided by the embodiment of the present application may determine the current communication scenario, and execute the subsequent steps to determine whether the CA includes the target SCC if the current communication scenario is the DLCA. If the target SCC is included in the CA, the target SCC can be received through a low-pass path, so that the sensitivity of a receiver corresponding to the target SCC is improved.

Step 502, determining the frequency band of each carrier signal in the DLCA when the communication scenario is the DLCA.

In some embodiments, communication system 300 includes a demodulator that may be used to demodulate carrier signals. In this way, after the carrier signal is demodulated, the current communication scenario, the frequency band of each carrier signal (that is, the frequency band corresponding to PCC and each SCC in the received CA) and other information can be obtained.

Illustratively, after the communication system 300 receives the CA, the demodulator may perform demodulation processing on the CA. Furthermore, CA may be obtained as DLCA, and sub-bands of each carrier signal in CA, as well as a carrier signal as PCC and a carrier signal as SCC may be obtained. For example, the CA includes two carrier signals, where the sub-band corresponding to the PCC is B1, the sub-band corresponding to the SCC is B5, that is, the band corresponding to the PCC is a medium-high frequency, and the band corresponding to the SCC is a low frequency. For another example, the CA includes three carrier signals, where the sub-band corresponding to the PCC is B1, the sub-band corresponding to the SCC1 is B5, the sub-band corresponding to the SCC2 is B8, that is, the band corresponding to the PCC is a medium-high frequency, and the bands corresponding to the SCC1 and the SCC2 are low frequencies. For another example, the CA includes three carrier signals, where the sub-band corresponding to the PCC is sub6G, the sub-band corresponding to the SCC1 is B1, the sub-band corresponding to the SCC2 is B5, that is, the band corresponding to the PCC is sub6G, the band corresponding to the SCC1 is medium-high frequency, and the band corresponding to the SCC2 is low frequency. For another example, the CA includes three carrier signals, where the sub-band corresponding to the PCC is B1, the sub-band corresponding to the SCC1 is sub6G, the sub-band corresponding to the SCC2 is B5, that is, the frequency band corresponding to the PCC is medium-high frequency, the frequency band corresponding to the SCC1 is sub6G, and the frequency band corresponding to the SCC2 is low frequency. That is, there may be different combinations of PCC and SCC frequency bands in the DLCA, which are not listed here.

Step 503, determining an alternative SCC from at least one SCC based on a preset condition.

The preset condition in the embodiment of the present application may include that the frequency band of the SCC is lower than the frequency band of the PCC. In this way, it may be determined whether the frequency band of each SCC is lower than the frequency band of the PCC, and if the frequency band of the SCC is lower than the frequency band of the PCC, the SCC is determined as an alternative SCC.

It should be noted that, in the embodiment of the present application, the reason that the SCC lower than the PCC frequency band may be used as the alternative SCC is that the low-pass filter may filter the PCC in the higher frequency band from the CA, so as to obtain the SCC. In the DLCA scene, the transmitter corresponding to the SCC does not work, so that a duplexer access can be skipped, and the CA is processed by adopting a newly added low-pass access to obtain the target SCC.

It should be further noted that, in the embodiment of the present application, the reason that the SCC higher than the PCC frequency band cannot be used as the alternative SCC is that, first, if the PCC frequency band is lower than the SCC frequency band, the low-pass filter cannot filter the PCC in the CA, so that the target SCC cannot be obtained through the low-pass path. Secondly, assuming that a high-pass filter is adopted to replace a low-pass filter, the high-pass filter cannot filter PCC processing with lower frequency bands, and a target SCC is obtained. The reason for this is that the lower frequency band PCC may form a second harmonic, e.g., 900MHz PCC, and possibly a second harmonic of 1.8 GHz. Thus, if the second harmonic of 1.8GHz just falls within the frequency band of the target SCC, the high-pass filter cannot filter the second harmonic of 1.8GHz carried in CA, and the target SCC cannot be obtained. In addition, the reason why the PCC cannot skip the duplexer path in the embodiment of the application is that in the DLCA scene, the transmitter corresponding to the PCC is in a working state, so the PCC cannot skip the duplexer path.

In some embodiments, the preset condition may further include that the signal quality parameter of the SCC is below a signal quality parameter threshold.

The embodiment of the present application does not limit specific signal quality parameters, for example, the signal quality parameters may be any one or two of reference signal received power (REFERENCE SIGNAL RECEIVING power, RSRP) and bit error rate. If the RSRP of the SCC is above the RSRP threshold, it indicates that the signal quality of the SCC is good, and for an SCC with good signal quality, the quality of the SCC received by the receiver is also good. Therefore, in this case, it is not meaningful to skip the duplexer reception path and the pass-low path. If the bit error rate is high, there may be interference signals falling in the frequency band corresponding to the target SCC, thereby affecting the reception of the target SCC, and thus the SCC with the high bit error rate is not suitable for the low pass path.

Exemplary signal quality parameters include RSRP and bit error rate. Thus, the preset conditions include that the RSRP of the SCC is below the RSRP threshold and that the bit error rate of the SCC is below the bit error rate threshold. For example, the RSRP threshold is-110 dB and the bit error rate threshold is 0.5%. The above-described preset condition may be relaxed a little in order to prevent frequent switching between the diplexer receive path and the low pass path. For example, the RSRP threshold is set to-100 dB and the bit error rate threshold is set to 1.5%. That is, the preset conditions include that the RSRP of the SCC is lower than-100 dB, and the error rate of the SCC is lower than 1.5%.

In some embodiments, the preset condition may further include that the radio frequency module corresponding to the SCC and the radio frequency module corresponding to the PCC are not the same radio frequency module. Thus, the isolation between the target SCC and the PCC can be ensured, so that the target SCC is not interfered by the PCC as much as possible.

As can be seen from the above description of the communication system 300, the carrier signals in different frequency bands are correspondingly processed using different rf modules.

Illustratively, the CA includes PCC, SCC1, and SCC2, where PCC and SCC1 are high frequency signals and SCC2 is a low frequency signal. Thus, the radio frequency modules corresponding to PCC and SCC1 are the same radio frequency module, namely MHB-LPAMID, and the radio frequency module corresponding to SCC2 is LB-LPAMID. In this case, the SCC1 does not satisfy the preset condition, and the SCC2 satisfies the preset condition, that is, the SCC2 is determined as the alternative SCC.

It should be noted that, in the embodiment of the present application, the judging order of each preset condition is not limited, for example, the judgment of each preset condition may be parallel processing or serial processing.

For example, taking a preset condition including that the frequency band of the SCC is lower than the frequency band of the PCC, the RSRP of the SCC is lower than the RSRP threshold, the bit error rate of the SCC is lower than the bit error rate threshold, and the radio frequency module corresponding to the SCC and the radio frequency module corresponding to the PCC are different radio frequency modules, the method can sequentially determine whether the radio frequency module corresponding to the SCC and the radio frequency module corresponding to the PCC are different radio frequency modules, determine whether the frequency band of the SCC is lower than the frequency band of the PCC, determine whether the RSRP of the SCC is lower than the RSRP threshold, and determine whether the bit error rate of the SCC is lower than the bit error rate threshold. Through the above determination, the alternative SCCs that simultaneously satisfy the above four preset conditions may be determined.

The number of candidate SCCs determined from the at least one SCC may be zero, one or a plurality based on preset conditions. For example, where the CA includes two carrier signals, the SCC is medium and high frequency, and the PCC is low frequency, the number of alternative SCCs is zero. For another example, where the CA includes two carrier signals, the PCC is medium and high frequency, and the SCC is low frequency, the alternative SCC is one. For another example, where the CA includes three carrier signals, the PCC is medium and high frequency, and SCC1 and SCC2 are low frequency, the alternative SCC is two.

In the case where the number of alternative SCCs is zero, it is indicated that there is no target SCC suitable for the low pass path, in which case each SCC and PCC walk the corresponding diplexer receive path.

In the case where the number of alternative SCCs is one, then step 504 is employed to determine the target SCC.

In the case where the number of alternative SCCs is plural, steps 505 to 507 are employed to determine the target SCC.

In step 504, in the case where the number of alternative SCCs is one, the alternative SCC is determined to be the target SCC.

In step 505, if the number of the alternative SCCs is multiple, the radio frequency module corresponding to each alternative SCC is determined based on the frequency band of each alternative SCC.

In some embodiments, the communication system 300 includes multiple low-pass-through added rf modules, in which case each low-pass-through added rf module is capable of supporting processing on one target SCC.

Illustratively, as shown in FIG. 7, both MHB-LPAMID and LB-LPAMID in communication system 300 are radio modules with low-pass channels added. In this case, if the target SCC is one sub-band corresponding to MHB-LPAMID, the target SCC may go the low-pass path in MHB-LPAMID. If the target SCC is one of the sub-bands corresponding to LB-LPAMID, then the target SCC may walk the low-pass path in LB-LPAMID. It follows that in this case, the communication system may walk the corresponding low-pass path to each of the two target SCCs supported simultaneously.

Based on the analysis, in the embodiment of the application, when the number of the alternative SCCs is multiple, the radio frequency module corresponding to each alternative SCC can be determined based on the frequency band of each alternative SCC.

Illustratively, in connection with FIG. 7, it is assumed that the alternative SCCs include SCC1, SCC2, and SCC3, where the sub-band B5 of SCC1, the sub-band of SCC2 is B1, and the sub-band of SCC3 is B3. Thus, the radio frequency module corresponding to SCC1 can be determined as LB-LPAMID, and the radio frequency module corresponding to SCC2 and SCC3 is determined as MHB-LPAMID.

Step 506, selecting one candidate SCC from the multiple candidate SCCs as the target SCC under the condition that the radio frequency modules corresponding to the candidate SCCs are the same radio frequency module.

Because only one sub-band signal can be output after the low-pass processing, when the same radio frequency module comprises a plurality of alternative SCCs, one of the plurality of alternative SCCs needs to be selected as a target SCC corresponding to the radio frequency module.

Illustratively, in connection with FIG. 7, it is assumed that the alternative SCCs include SCC1, SCC2, and SCC3, where the sub-band B5 of SCC1, the sub-band of SCC2 is B8, and the sub-band of SCC3 is B20. In this way, the radio frequency modules corresponding to SCC1, SCC2 and SCC3 can be determined to be LB-LPAMID. In this case, thus, SCC1, SCC2, and SCC3 select one as the target SCC.

In the embodiment of the present application, a method for selecting one candidate SCC from a plurality of candidate SCCs as a target SCC is not particularly limited. For example, one candidate SCC may be randomly selected from a plurality of candidate SCCs as the target SCC. As another example, the candidate SCC with the worst signal quality of the plurality of candidate SCCs may be regarded as the target SCC.

In step 507, when the radio frequency module corresponding to each alternative SCC includes a plurality of different radio frequency modules, each alternative SCC is selected from the alternative SCCs corresponding to the different radio frequency modules as the target SCC.

Illustratively, in connection with FIG. 7, it is assumed that the alternative SCCs include SCC1, SCC2, SCC3, and SCC4, where the sub-band B5 of SCC1, the sub-band of SCC2 is B8, the sub-band of SCC3 is B1, and the sub-band of SCC4 is B3. In this way, the radio frequency modules corresponding to SCC1 and SCC2 are determined to be LB-LPAMID, and the radio frequency modules corresponding to SCC3 and SCC4 are determined to be MHB-LPAMID. In this case, one may be selected as the target SCC among SCC1 and SCC2, and one may be selected as the target SCC among SCC3 and SCC4, respectively. For example, SCC2 and SCC3 are selected as target SCCs, so that SCC2 can select a low-pass path in the radio frequency module LB-LPAMID, and SCC3 can select a low-pass path in the radio frequency module MHB-LPAMID, thereby improving the sensitivity of the receivers corresponding to the two paths.

Step 508, determining a first low noise amplifier corresponding to the target SCC based on the sub-band of the target SCC.

In an embodiment of the present application, each rf module includes a low noise amplifier bank 405. The low noise amplifier group 405 includes a plurality of low noise amplifiers LNA, each of which is used for amplifying a specific sub-band to obtain a specific sub-band signal. For example, in connection with FIG. 7, LB-LPAMID, LNA1, LNA2, and LNA3 may be used for the B5, B8, and B20 amplification processes, respectively. In MHB-LPAMID, LNA1, LNA2, and LNA3 may be used for the B1, B3, and B7 amplification processes, respectively.

In this way, in the case where the number of target SCCs is one, the first low noise amplifier corresponding to the target SCC is determined. For example, in connection with FIG. 7, assuming the sub-band of the target SCC is B5, the first low noise amplifier is LNA1 in LB-LPAMID. When the number of target SCCs is plural, a first low noise amplifier corresponding to each target SCC is determined. For example, in connection with FIG. 7, assuming that the target SCC includes two, one sub-band of B5 and the other sub-band of B1, the first low noise amplifier is LNA1 in LB-LPAMID and LNA1 in MHB-LPAMID.

Step 509, controlling the CA to sequentially input a low-pass filter and a first low-noise amplifier, performing filtering processing on PCC in the CA, and performing amplification processing on the target SCC to obtain the target SCC.

And under the condition that the target SCC is one, the control CA inputs the low-pass channel in the radio frequency module corresponding to the target SCC.

Illustratively, as shown in fig. 10, it is assumed that the received CA includes one PCC and one SCC, the sub-band of the PCC is B1 (medium-high band), and the sub-band of the SCC is B5 (low band). In this way, the SCC satisfies the preset condition of the low-pass path, i.e., the SCC is the target SCC. CA is respectively input to the middle-high frequency radio frequency module MHB-LPAMID and the low frequency radio frequency module LB-LPAMID.

In MHB-LPAMID, the first switching element 401 electrically connects the antenna 407 to the first end of the duplexer 404a corresponding to the B1 sub-band, and the second end of the duplexer 404a corresponding to the B1 sub-band is electrically connected to the LNA1 through the second switching element 402, so that after processing through the receiving path corresponding to the above-mentioned duplexer 404a, the receiver RX1 can receive the PCC.

In LB-LPAMID, the first switching element 401 connects the antenna 407 to the input of the low-pass filter 408, and the output of the low-pass filter 408 is connected to the LNA1 corresponding to B5 through the second switching element 402, so that after the low-pass processing, the receiver RX1 can receive the SCC.

Since the insertion loss of the low-pass filter 408 is smaller than that of the diplexer, the above scheme can improve the sensitivity of the receiver RX1 in LB-LPAMID.

And under the condition that a plurality of target SCCs are adopted, the CA is respectively controlled to input the low-pass channels in the radio frequency modules corresponding to the target SCCs. The carrier signals except the target SCC in the CA are output to the corresponding receivers through the corresponding duplexer receiving paths.

As shown in fig. 11, it is assumed that the received CA includes one PCC and four SCCs, the PCC has a frequency band of sub6G, the SCC1 has a frequency sub 5 (low frequency band), the SCC2 has a frequency sub 8 (low frequency band), the SCC3 has a frequency sub 3 (medium-high frequency band), and the SCC4 has a frequency sub 1 (medium-high frequency band). In this case, SCC1, SCC2, SCC3, and SCC4 are all candidate SCCs. Because SCC1 and SCC2 correspond to the same radio frequency module LB-LPAMID, SCC3 and SCC4 correspond to the same radio frequency module MHB-LPAMID, one of SCC1 and SCC2 can be selected as a target SCC, and one of SCC3 and SCC4 can be selected as a target SCC. For example, SCC2 and SCC3 are selected as target SCCs, so that SCC2 can select a low-pass path in the walk-away radio frequency module LB-LPAMID, and SCC3 can select a low-pass path in the walk-away radio frequency module MHB-LPAMID, thereby improving the sensitivity of the corresponding receivers of the two paths.

In this way, CA is respectively input to the low-frequency radio frequency module LB-LPAMID, the medium-high frequency radio frequency module MHB-LPAMID and the sub6G radio frequency module sub6G-LPAMID.

In sub6G-LPAMID, the first switching element 401 electrically connects the antenna 407 with the first end of the duplexer 404a corresponding to the sub6G sub-band, and the second end of the duplexer 404a corresponding to the sub6G sub-band is electrically connected with the LNA1 through the second switching element 402, so that after processing through the receiving path corresponding to the duplexer 404a, the receiver RX1 can receive PCC.

In MHB-LPAMID, the diplexer receive path and the low-pass path of diplexer 404a corresponding to the B1 sub-band are on. In this way, after CA is processed by the duplexer reception path corresponding to the duplexer 404a, the receiver RX1 may receive the SCC4. After the CA has undergone the low-pass path processing, the receiver RX3 may receive SCC3. Thus, this scheme may improve the sensitivity of receiver RX3 in MHB-LPAMID.

In LB-LPAMID, the diplexer receive path and the low-pass path of diplexer 404a corresponding to the B5 sub-band are on. In this way, after the CA is processed through the duplexer reception path of the duplexer 404a, the receiver RX1 may receive the SCC1. After the CA has undergone low-pass path processing, receiver RX2 may receive SCC2. Thus, the scheme can improve the sensitivity of the receiver RX2 in LB-LPAMID.

It should be noted that, in the embodiment of the present application, the cut-off frequency of the low-pass filter 408 can support the low-frequency or medium-high-frequency signal passing. The cut-off frequency of the low pass filter 408 takes a value greater than f1 and less than f2.

Illustratively, in connection with FIG. 6, in this case, f1 is the maximum frequency of the multiple sub-bands supported by LB-LPAMID and f2 is the minimum frequency of the multiple sub-bands supported by MHB-LPAMID (or sub 6G-LPAMID). That is, the cut-off frequency of the low pass filter 408 in LB-LPAMID is greater than the maximum frequency in the multiple sub-bands supported by LB-LPAMID and less than the minimum frequency of the multiple sub-bands supported by MHB-LPAMID (or sub 6G-LPAMID). Thus, the low pass filter 408 may support cutting any of the MHB-LPAMID (or sub 6G-LPAMID) sub-bands and supporting the LB-LPAMID sub-band pass. That is, in the embodiment of the present application, a low-pass filter 408 is added to one LB-LPAMID, and there is no need to set one low-pass filter 408 for each sub-band, so as to meet the requirement of high integration of the rf module.

Illustratively, in connection with FIG. 7, in this case, f1 of the low pass filter 408 in LB-LPAMID is the maximum frequency of the multiple sub-bands supported by LB-LPAMID and f2 is the minimum frequency of the multiple sub-bands supported by MHB-LPAMID. F1 of the low pass filter 408 in MHB-LPAMID is the maximum frequency in the multiple sub-bands supported by MHB-LPAMID, and f2 is the minimum frequency in the multiple sub-bands supported by sub 6G-LPAMID. Thus, the low pass filter 408 in LB-LPAMID is capable of supporting the passage of each sub-band on LB-LPAMID while blocking each sub-band in MHB-LPAMID and sub 6G-LPAMID. The low pass filter 408 in MHB-LPAMID is capable of supporting the passage of each sub-band on MHB-LPAMID while cutting off each sub-band in LB-LPAMID and sub 6G-LPAMID.

The effect of the receiver sensitivity improvement scheme provided by the embodiment of the application is described below with reference to a simulation diagram.

Fig. 12 is a schematic diagram of simulation results of simulating the insertion loss of the duplexer receiving path of the normal sub-band based on fig. 4, and fig. 13 is a schematic diagram of simulation results of simulating the insertion loss of the low-pass path of the normal sub-band based on fig. 4. In the simulation, S (1, 2) represents the insertion loss value.

As shown in fig. 12 (a), the average insertion loss value of the duplexer reception path corresponding to B26 is-2 dB, and as shown in fig. 12 (B), the average insertion loss value of the duplexer reception path corresponding to B8 is-1.5 dB. As shown in fig. 12 (c), the average insertion loss value of the duplexer reception path corresponding to B20 is-1.5 dB. As shown in fig. 12 (d), the average insertion loss value of the duplexer reception path corresponding to B1 is-1.5 dB. As shown in fig. 12 (e), the average insertion loss value of the duplexer reception path corresponding to B3 is-1.5 dB. As shown in fig. 12 (f), the average insertion loss value of the duplexer reception path corresponding to B7 is-1.5 dB.

As shown in fig. 13 (b) which is a partial enlarged view of fig. 13 (a), m1 is an insertion loss value of a low-pass path corresponding to a 960MHz signal, which is-1.094 dB, m2 is an insertion loss value of a low-pass path corresponding to a 1.700GHz signal, which is-28.284 dB, and m3 is an insertion loss value of a low-pass path corresponding to a 700MHz signal, which is-0.786 dB. As shown in fig. 13 (b), m4 is the insertion loss value of the low-pass path corresponding to the 960MHz signal, which is-1.094 dB, m5 is the insertion loss value of the low-pass path corresponding to the 1.700GHz signal, which is-28.284 dB, and m6 is the insertion loss value of the low-pass path corresponding to the 700MHz signal, which is-0.786 dB. That is, for low frequencies, the insertion loss value is-0.786 to-1.094 dB.

As can be seen from comparison between fig. 12 and 13, for low frequency signals of 900MHz or less, the average insertion loss value of the diplexer receive path is about 1.5dB to 2.0dB, and the insertion loss value of the low pass path is about 0.786dB to 1dB, so that the insertion loss of the pass path can be optimized by about 0.7dB to 1dB as compared with the diplexer receive path.

In the commercial low-pass filter, the insertion loss of the corresponding low-pass path is about 0.5dB, and therefore, in this case, the insertion loss of the low-pass path can be optimized by about 1.0dB to 1.5dB as compared with the reception path of the duplexer.

In addition, as can be seen from comparing fig. 12 and fig. 13, the low-pass channel provided by the embodiment of the application has a suppression degree of less than 1dB for low-frequency signals below 900MHz and a suppression degree of more than 30dB for high-frequency signals above 1.7GHz and sub6G signals, which proves that the low-pass channel can ensure the low-frequency signals to pass through and can suppress the high-frequency signals. That is, in the embodiment of the present application, the target SCC of the low-pass path is not interfered by the PCC of the higher frequency band.

In summary, according to the method for improving the sensitivity of the receiver provided by the embodiment of the application, by determining whether the DLCA scene includes the alternative SCCs meeting the preset conditions, if the DLCA scene includes the alternative SCCs meeting the preset conditions, the target SCC is selected from the alternative SCCs, and then the target SCC is received through the low-pass path, so that the sensitivity of the receiver corresponding to the target SCC can be improved.

The method for improving the sensitivity of the receiver provided by the embodiment of the application can be applied to the communication system and/or the radio frequency module provided by the embodiment, or can be applied to a terminal comprising the communication system and/or the radio frequency module.

In some examples, the terminal may be a mobile phone, a tablet computer, a handheld computer, a personal computer (personal computer, PC), a Personal Digital Assistant (PDA), a wearable device, or an electronic device with communication function. The embodiment of the application does not limit the specific form of the terminal.

By way of example, taking a terminal as a mobile phone, fig. 14 shows a schematic structural diagram of the terminal according to an embodiment of the present application.

As shown in fig. 14, the handset 60 may include a processor 601, an external memory interface 602, an internal memory 603, an antenna 1, an antenna 2, a mobile communication module 604, a wireless communication module 605, a display 606, and the like.

It should be understood that the structure illustrated in this embodiment is not limited to the specific configuration of the mobile phone 60. In other embodiments, the handset 60 may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 601 may be the neural and command centers of cell phone 60. The processor 601 may generate operation control signals according to the instruction operation code and the timing signals to complete instruction fetching and instruction execution control.

A memory may be provided in the processor 601 for storing instructions and data. In some embodiments, the memory in the processor 601 is a cache memory. The memory may hold instructions or data that the processor 601 has just used or recycled. If the processor 601 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 601 is reduced, thereby improving the operating efficiency of the processor 601.

The wireless communication function of the mobile phone 60 can be implemented by the antenna 1, the antenna 2, the mobile communication module 604, the wireless communication module 605, the modem processor, the baseband processor, and the like. For example, the method for improving the sensitivity of the receiver in the embodiment of the application can be realized based on the wireless communication function.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the handset 60 may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example, the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network.

The mobile communication module 604 may provide a solution for wireless communication including 2G/3G/4G/5G, etc. applied to the handset 60. The mobile communication module 604 may include at least one filter, switch, power amplifier, low noise amplifier, etc. The mobile communication module 604 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the electromagnetic waves to the modem processor for demodulation. The mobile communication module 604 may amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate. In some embodiments, at least some of the functional modules of the mobile communication module 604 may be provided in the processor 601. In some embodiments, at least some of the functional modules of the mobile communication module 604 may be provided in the same device as at least some of the modules of the processor 601.

The wireless communication module 605 may provide solutions for wireless communications, including wireless local area networks (wireless local area networks, WLAN), BT, etc., as applied to the handset 60. The wireless communication module 605 may be one or more devices that integrate at least one communication processing module. The wireless communication module 605 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 601. The wireless communication module 605 may also receive a signal to be transmitted from the processor 601, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation via the antenna 2.

In some embodiments, the antenna 1 of the handset 60 is coupled to the mobile communication module 604 and the antenna 2 is coupled to the wireless communication module 605 so that the handset 60 can communicate with a network and other devices (e.g., servers) via wireless communication technology. The wireless communication technology may include a global system for mobile communications (global system for mobile communications, GSM), BT, and/or WLAN, among others.

The external memory interface 602 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the handset 60. The internal memory 603 may be used to store computer executable program code including computer instructions. The processor 601 executes various functional applications of the handset 60 and data processing by executing computer instructions stored in the internal memory 503.

It will be understood, of course, that the illustration of fig. 14 is merely exemplary of the case where the terminal is in the form of a cellular phone. If the terminal is a tablet computer, a handheld computer, a PC, a PDA, a wearable device, or other devices, the structure of the terminal may include fewer structures than those shown in fig. 14, or may include more structures than those shown in fig. 14, which is not limited herein.

It will be appreciated that the terminal or communication system, in order to implement the above-mentioned functions, includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

The method embodiments described herein may be independent schemes or may be combined according to internal logic, and these schemes fall within the protection scope of the present application.

It will be appreciated that in the various method embodiments described above, the methods and operations performed by the terminal or the communication system may also be performed by components (e.g., chips, modules, or circuits) that may be used in the terminal or the communication system.

The above embodiment describes the method for optimizing the sensitivity of the receiver provided by the application. It will be appreciated that the terminal or communication system, in order to carry out the functions described above, includes corresponding hardware structures and/or software modules that perform each of the functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional modules of the terminal or the communication system according to the method example, for example, each functional module can be divided corresponding to each function, and two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

The method for optimizing the sensitivity of the receiver provided by the embodiment of the application is described in detail above with reference to fig. 1 to 13. The device provided by the embodiment of the application is described in detail below with reference to fig. 15. It should be understood that the descriptions of the apparatus embodiments and the descriptions of the method embodiments correspond to each other, and thus, descriptions of details not described may be referred to the above method embodiments, which are not repeated herein for brevity.

Referring to fig. 15, fig. 15 is a block diagram of a receiver sensitivity optimizing apparatus according to an embodiment of the present application. The device can be part of a terminal and can be applied to the terminal. Or may be a terminal, to which the present application is not limited. As shown in fig. 15, the apparatus 700 may include a communication scenario determination module 701, a frequency band determination module 702, an alternative secondary carrier signal determination module 703, a target secondary carrier signal determination module 704, a first low noise amplifier determination module 705, and a control module 706. The apparatus 700 may perform the operations performed by the terminal in any of the method embodiments described above with respect to fig. 9.

For example, in an alternative embodiment of the present application, the communication scenario determination module 701 is configured to determine a communication scenario of the communication system;

A frequency band determining module 702, configured to determine a frequency band of a multi-carrier signal in downlink carrier aggregation in the case where the communication scenario is downlink carrier aggregation;

An alternative auxiliary carrier signal determining module 703, configured to determine an alternative auxiliary carrier signal from the at least one auxiliary carrier signal based on a preset condition, where the preset condition includes that a frequency band of the auxiliary carrier signal is lower than a frequency band of the main carrier signal;

a target auxiliary carrier signal determining module 704, configured to determine, when the number of the candidate auxiliary carrier signals is one, that the candidate auxiliary carrier signal is a target auxiliary carrier signal;

A first low noise amplifier determining module 705, configured to determine a first low noise amplifier corresponding to the target auxiliary carrier signal based on a sub-band of the target auxiliary carrier signal;

And the control module 706 is configured to control the plurality of carrier signals to be sequentially input into the low-pass filter and the first low-noise amplifier, perform filtering processing on the main carrier signal in the plurality of carrier signals, and amplify the target auxiliary carrier signal to obtain the target auxiliary carrier signal.

That is, the apparatus 700 may implement steps or processes performed by a terminal in an embodiment of a method for optimizing sensitivity of any one of the receivers shown in fig. 9, and the apparatus 700 may include modules for performing a method performed by the terminal in an embodiment of any one of the methods shown in fig. 9. It should be understood that the specific process of each module to perform the corresponding steps is described in detail in the above method embodiments, and is not described herein for brevity.

The embodiment of the application also provides a terminal which comprises a processor, a memory, a communication interface and a communication bus. The processor, the memory and the communication interface complete communication with each other through a communication bus. The memory is used for storing computer instructions. Wherein the processor, when executing the computer instructions, causes the terminal to perform the functions or steps performed by the terminal in the method embodiments described above.

The embodiment of the application also provides a processing device which comprises at least one processor and a communication interface. The communication interface is configured to provide information input and/or output to the at least one processor, which is configured to perform the method of the above-described method embodiments.

It should be understood that the processing means may be a chip. For example, the chip may be a general-purpose processor or a special-purpose processor. The chip may include at least one processor. Wherein the at least one processor may be configured to support the apparatus shown in fig. 15 to perform the technical solution shown in any one of the embodiments in fig. 9.

Optionally, the chip may further include a communication system, where the communication system is configured to receive control of the processor, and is configured to support the apparatus shown in fig. 15 to perform the technical solution shown in any one of the embodiments in fig. 9. Optionally, the chip may further comprise a storage medium.

The embodiment of the application also provides a chip, which comprises the radio frequency module in the embodiment or the communication system in the embodiment.

Embodiments of the present application also provide a computer-readable storage medium storing computer instructions. The computer instructions, when executed on the communications device, cause the terminal to perform the various functions or steps performed by the terminal in the method embodiments described above.

For example, the computer readable storage medium may be Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), compact disc Read-Only Memory (CD-ROM), magnetic tape, floppy disk, optical data storage device, and the like.

The embodiments of the present application also provide a computer program product comprising computer instructions which, when run on a communications device, cause the terminal to perform the functions or steps performed by the terminal in the method embodiments described above.

The terminal, the communication system, the computer readable storage medium or the computer program product provided by the embodiments of the present application are used to execute the corresponding method provided above, so that the beneficial effects thereof can be referred to the beneficial effects in the corresponding method provided above, and will not be described herein.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules, that is, the internal structures of the devices (e.g., terminals, communication systems) are divided into different functional modules to implement all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) or a processor to perform all or part of the steps of the method according to the embodiments of the present application. The storage medium includes various media capable of storing program codes such as flash memory, removable hard disk, read-only memory, random access memory, magnetic disk or optical disk.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A radio frequency module, characterized in that it comprises: a first switch element, a low-pass filter, a second switch element and a first low-noise amplifier, wherein the first switch element comprises a first end and a second end, the second end comprises a first pin, the second switch element comprises a third end and a fourth section, the third end comprises a second pin, and the fourth section comprises a third pin; the first end is used to be electrically connected to an antenna, the first pin is electrically connected to an input end of the low-pass filter, the output end of the low-pass filter is electrically connected to the second pin, and the third pin is electrically connected to the first low-noise amplifier;

The first switch element is used to output the multiple carrier signals received by the RF module when there is a target auxiliary carrier signal; wherein the multiple carrier signals include a main carrier signal and the target auxiliary carrier signal;

The low-pass filter is used to filter the main carrier signal among the multiple carrier signals to obtain at least one auxiliary carrier signal, wherein the at least one auxiliary carrier signal includes the target auxiliary carrier signal;

The second switch element is used to output the at least one auxiliary carrier signal;

The first low noise amplifier is used to amplify the target secondary carrier signal in the at least one secondary carrier signal to obtain the target secondary carrier signal.

2. The RF module according to claim 1 is characterized in that the RF module includes a transceiver serial port and an LNA serial port; the first pin is electrically connected to the transceiver serial port, and the transceiver serial port is electrically connected to the input end of the low-pass filter; the output end of the low-pass filter is electrically connected to the LNA serial port, and the LNA serial port is electrically connected to the second pin.

3. The RF module according to claim 1 is characterized in that the second end of the first switching element also includes at least one fourth pin, and the RF module also includes at least one duplexer, the first end of the at least one duplexer group is respectively electrically connected to the fourth pin, and the second end of the at least one duplexer group is respectively electrically connected to the second pin.

4. The RF module according to claim 1 is characterized in that the RF module also includes at least one second low-noise amplifier connected in parallel with the first low-noise amplifier, and the first low-noise amplifier and the at least one second low-noise amplifier are respectively used to amplify and process carrier signals of different sub-frequency bands.

5. The RF module according to claim 3 is characterized in that the RF module also includes a third switch and at least one power amplifier, the third switch includes a fifth end and a sixth end, the fifth end includes at least one fifth pin, the sixth end includes at least one sixth pin, the third end of the at least one duplexer group is electrically connected to the fifth pin, and the output end of the at least one power amplifier is electrically connected to the sixth pin, respectively.

6. The radio frequency module according to claim 1 is characterized in that the target auxiliary carrier signal is an auxiliary carrier signal that meets the following preset conditions, and the preset conditions include: a frequency band of the auxiliary carrier signal is lower than a frequency band of the main carrier signal.

7. The radio frequency module according to claim 6, wherein the preset condition further comprises at least one of the following:

The reference signal received power RSRP of the secondary carrier signal is lower than the RSRP threshold;

The bit error rate of the auxiliary carrier signal is lower than the bit error rate threshold;

The auxiliary carrier signal and the main carrier signal correspond to different radio frequency modules.

8. A communication system, characterized in that the communication system comprises a first radio frequency module, and the first radio frequency module is the radio frequency module according to any one of claims 1-7.

9. The communication system according to claim 8 is characterized in that the communication system also includes a second radio frequency module, and the frequency band of the carrier signal received and transmitted by the second radio frequency module is higher than the frequency band of the carrier signal received and transmitted by the first radio frequency module.

10. The communication system according to claim 9 is characterized in that the communication system further comprises a third RF module, and a frequency band of a carrier signal received and transmitted by the third RF module is higher than a frequency band of a carrier signal received and transmitted by the second RF module.

11. The communication system according to claim 10, characterized in that the second RF module is the RF module according to any one of claims 1-6.

12. The communication system according to claim 11 is characterized in that the first RF module is used to transmit and receive low-frequency carrier signals, the second RF module is used to transmit and receive medium- and high-frequency carrier signals, and the third RF module is used to transmit and receive sub6G carrier signals.

13. A chip, characterized in that the chip comprises the radio frequency module according to any one of claims 1 to 7, or the communication system according to any one of claims 8 to 12.

14. A method for optimizing receiver sensitivity, characterized in that the method is applied to the communication system according to any one of claims 8 to 12, and the method comprises:

Determining a communication scenario of the communication system;

In the case where the communication scenario is downlink carrier aggregation, determining frequency bands of multiple carrier signals in the downlink carrier aggregation; the multiple carrier signals include a primary carrier signal and at least one secondary carrier signal;

Based on a preset condition, determining a candidate auxiliary carrier signal from the at least one auxiliary carrier signal; wherein the preset condition includes: a frequency band of the auxiliary carrier signal is lower than a frequency band of the main carrier signal;

When the number of the candidate secondary carrier signal is one, determining the candidate secondary carrier signal as a target secondary carrier signal;

Determining a first low noise amplifier corresponding to the target secondary carrier signal based on the sub-frequency band of the target secondary carrier signal;

The multiple carrier signals are controlled to be sequentially input into a low-pass filter and the first low-noise amplifier, the main carrier signal among the multiple carrier signals is filtered, and the target auxiliary carrier signal is amplified to obtain the target auxiliary carrier signal.

15. The method according to claim 14, characterized in that when there are multiple candidate auxiliary carrier signals, the method further comprises:

Determining, based on the frequency band of each of the candidate auxiliary carrier signals, a radio frequency module corresponding to each of the candidate auxiliary carrier signals;

In a case where the radio frequency modules corresponding to the candidate auxiliary carrier signals are the same radio frequency module, selecting a candidate auxiliary carrier signal from the plurality of candidate auxiliary carrier signals as a target auxiliary carrier signal;

In the case that the radio frequency modules corresponding to the candidate auxiliary carrier signals include a plurality of different radio frequency modules, one of the candidate auxiliary carrier signals corresponding to different radio frequency modules is selected as the target auxiliary carrier signal.

16. The method according to claim 15, characterized in that the method further comprises: obtaining a signal quality parameter of the at least one auxiliary carrier signal;

The preset condition also includes: a signal quality parameter of the secondary carrier signal is lower than a signal quality parameter threshold.

17. The method according to claim 16, characterized in that the signal quality parameter comprises RSRP and/or bit error rate.

18. The method according to any one of claims 14 to 17, characterized in that the method further comprises:

Determine a radio frequency module corresponding to the at least one auxiliary carrier signal and the main carrier signal;

The preset condition also includes: the RF module corresponding to the auxiliary carrier signal and the RF module corresponding to the main carrier signal are two different RF modules.

19. The method according to claim 14 is characterized in that the frequency band of the target auxiliary carrier signal is low frequency, and the frequency band of the main carrier signal is medium-high frequency or sub6G; or, the frequency band of the target auxiliary carrier signal is medium-high frequency, and the frequency band of the main carrier signal is sub6G.

20. A device for optimizing receiver sensitivity, characterized in that the device comprises:

A communication scenario determination module, used to determine the communication scenario of the communication system;

A frequency band determination module, configured to determine a frequency band of a multi-carrier signal in downlink carrier aggregation when the communication scenario is downlink carrier aggregation; the multiple carrier signals include a primary carrier signal and at least one secondary carrier signal;

A candidate auxiliary carrier signal determination module, configured to determine a candidate auxiliary carrier signal from the at least one auxiliary carrier signal based on a preset condition; wherein the preset condition includes: a frequency band of the auxiliary carrier signal is lower than a frequency band of the main carrier signal;

a target secondary carrier signal determining module, configured to determine, when the number of the candidate secondary carrier signals is one, the candidate secondary carrier signal as a target secondary carrier signal;

A first low noise amplifier determination module, configured to determine a first low noise amplifier corresponding to the target auxiliary carrier signal based on a sub-frequency band of the target auxiliary carrier signal;

A control module is used to control the multiple carrier signals to be input into the low-pass filter and the first low-noise amplifier in sequence, filter the main carrier signal among the multiple carrier signals, and amplify the target auxiliary carrier signal to obtain the target auxiliary carrier signal.

21. A terminal, characterized in that the terminal comprises the communication system according to any one of claims 8 to 12, and/or the device according to claim 20.

22. A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer program or instruction is executed on a computer, the computer executes the method according to any one of claims 14 to 19.