CN217010858U - A radio frequency circuit and electronic equipment - Google Patents

Abstract

The utility model provides a radio frequency circuit and electronic equipment, radio frequency circuit is including the wiFi radio frequency circuit of work at first frequency channel and the cellular radio frequency circuit of work at the second frequency channel, there is adjacent frequency interference between the wiFi signal of first frequency channel and the cellular signal of second frequency channel, pass through the passageway that is provided with coexistence filter in wiFi front-end circuit and cellular front-end circuit and the passageway that does not have coexistence filter, can be when these two radio frequency circuits simultaneous workings, avoid mutual interference through the passageway that has coexistence filter, do not work simultaneously at these two radio frequency circuits, reduce the insertion loss through the passageway that does not have coexistence filter, and the performance is improved.

Description

A radio frequency circuit and electronic equipment

technical field

The present disclosure relates to, but is not limited to, wireless communication technology, and more particularly, to a radio frequency circuit and an electronic device.

Background technique

With the rapid development of communication technology, cellular mobile communication (hereinafter referred to as cellular or cellular communication) has entered the 5G era. In the 5G New Radio (5G New Radio, 5GNR), a global 5G (fifth generation mobile communication) communication standard based on a new air interface design based on Orthogonal Frequency Division Multiplexing (OFDM). The spectrum has been expanded, and multiple frequency bands between 3.3G and 5G have been added to the Sub6G (electromagnetic waves with frequencies below 6GHz), including the N79 frequency band with a frequency range of 4.4GHz-5GHz. For WiFi5G, which is based on IEEE802.11, a wireless local area network communication standard, the frequency range of the commonly used frequency band includes 5.15GHz -5.835GHz, which is referred to as the 5G frequency band in this paper. Since the frequency interval between the N79 band and the 5G band is only 150MHz, and the bandwidth of the n79 band is wider, there is serious adjacent-channel interference between the cellular signal working in the N79 band and the Wi-Fi signal working in the 5G band.

Utility model content

The following is an overview of the topics detailed in this article. This summary is not intended to limit the scope of protection of the claims.

An embodiment of the present disclosure provides a radio frequency circuit, including a WiFi radio frequency circuit operating in a first frequency band and a cellular radio frequency circuit operating in a second frequency band, the WiFi signal in the first frequency band and the cellular signal in the second frequency band There is adjacent channel interference between:

The WiFi radio frequency circuit operating in the first frequency band includes a WiFi transceiver and one or more WiFi front-end circuits, wherein at least one WiFi front-end circuit is provided with two paths: a path without a WiFi coexistence filter and a path with a WiFi coexistence filter. path, and can switch between the path without the WiFi coexistence filter and the path with the WiFi coexistence filter;

The cellular radio frequency circuit operating in the second frequency band includes a cellular transceiver and one or more cellular front-end circuits, wherein at least one cellular front-end circuit is provided with two paths: a path without a cellular coexistence filter and a path with a cellular coexistence filter. and can switch between the path without the cellular coexistence filter and the path with the cellular coexistence filter.

An embodiment of the present disclosure further provides an electronic device, including: a device body; and the radio frequency circuit according to any embodiment of the present disclosure, wherein the radio frequency circuit is disposed on the device body.

In the radio frequency circuit and electronic device of the embodiments of the present disclosure, by setting a path with a coexistence filter and a path without a coexistence filter, it is possible to use the coexistence filter when the WiFi radio frequency circuit in the first frequency band and the cellular radio frequency circuit in the second frequency band work simultaneously. Solve the problem of mutual interference, and can switch to the channel without coexistence filter to reduce RF link insertion loss and improve performance when not working at the same time.

Other aspects will become apparent upon reading and understanding of the drawings and detailed description.

Description of drawings

The accompanying drawings are used to provide an understanding of the embodiments of the present disclosure, and constitute a part of the specification, and together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure, and do not limit the technical solutions of the present disclosure.

1 is a schematic diagram of a radio frequency circuit according to an embodiment of the present disclosure;

2 is a schematic diagram of a radio frequency circuit according to another embodiment of the present disclosure;

3 is a schematic diagram of a radio frequency circuit only provided with a coexistence filter path;

4 is a flowchart of a WiFi signal transmission control process in a signal transmission control method according to an embodiment of the present disclosure;

5 is a flowchart of a transmission control process of a cellular signal in a signal transmission control method according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a signal transmission control apparatus according to an embodiment of the present disclosure.

Detailed ways

The present disclosure describes various embodiments, but the description is exemplary rather than restrictive, and it will be apparent to those of ordinary skill in the art that within the scope of the embodiments described in this disclosure can be There are many more examples and implementations.

In the description of the present disclosure, the words "exemplary" or "such as" are used to mean serving as an example, illustration, or illustration. Any embodiment described in this disclosure as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments. In this article, "and/or" is a description of the association relationship between associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist simultaneously, and exist independently B these three cases. "Plural" means two or more. In addition, for the convenience of clearly describing the technical solutions of the embodiments of the present disclosure, words such as "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and functions. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like are not necessarily different.

In describing representative exemplary embodiments, the specification may have presented methods and/or processes as a particular sequence of steps. However, to the extent that the method or process does not depend on the specific order of steps described herein, the method or process should not be limited to the specific order of steps described. Other sequences of steps are possible, as will be understood by those of ordinary skill in the art. Therefore, the specific order of steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to performing their steps in the order written, as those skilled in the art will readily appreciate that these orders may be varied and still remain within the spirit and scope of the disclosed embodiments Inside.

There is adjacent channel interference between the cellular signal working in the N79 band and the WiFi signal working in the 5G band, which needs to be overcome. Similarly, the B40 frequency band and B41 frequency band used by 4G cellular mobile communication technology are completely adjacent to the 2.4G frequency band used by WiFi communication, which will cause 4G communication working in the B40 frequency band or B41 frequency band to work in the 2.4G frequency band. When the WiFi communication of the frequency band is jointly turned on, the stray signals transmitted by both parties will fall within the working frequency band of the other party, causing interference.

An embodiment of the present disclosure provides a radio frequency circuit. As shown in FIG. 1 , the radio frequency circuit includes a WiFi radio frequency circuit 20 operating in a first frequency band and a cellular radio frequency circuit 30 operating in a second frequency band. The second frequency band is adjacent, wherein: the WiFi radio frequency circuit 20 operating in the first frequency band includes a WiFi transceiver 201 and one or more WiFi front-end circuits, wherein at least one WiFi front-end circuit 203 is provided with two paths: no WiFi coexistence filter 2037 and the path with the WiFi coexistence filter 2037, and can switch between the path without the WiFi coexistence filter 2037 and the path with the WiFi coexistence filter 2037. The cellular radio frequency circuit 30 operating in the second frequency band includes a cellular transceiver 301 and one or more cellular front-end circuits, wherein at least one cellular front-end circuit 303 is provided with two paths: a path without a cellular coexistence filter and a path with a cellular coexistence filter. and can switch between the path without the cellular coexistence filter and the path with the cellular coexistence filter.

In the example of FIG. 1 , both the WiFi radio frequency circuit 20 and the cellular radio frequency circuit 30 are connected to the processor 10 . The front-end circuit in the text refers to the circuit used for transmitting and receiving radio frequency signals, including at least a front-end module and an antenna.

The WiFi front-end circuit provided with two channels in this embodiment can switch between the channel without the WiFi coexistence filter and the channel with the WiFi coexistence filter, and the cellular front-end circuit provided with two channels can switch between the channel without the WiFi coexistence filter and the channel with the WiFi coexistence filter. Switches between the channel with the cellular coexistence filter and the channel with the cellular coexistence filter. In this way, when the WiFi radio frequency circuit 20 and the cellular radio frequency circuit 30 work at the same time, and large mutual interference occurs, the WiFi front-end circuit with two channels can be switched to the channel with the WiFi coexistence filter, and the WiFi coexistence filter is used to filter out the The interference of the adjacent cellular signals of the second frequency band meets the transmission quality requirements of the WiFi signal, and when the cellular radio frequency circuit 30 does not work, that is, does not send and receive cellular signals of the second frequency band, the WiFi front-end circuit provided with two channels can be switched to The path without the WiFi coexistence filter avoids the insertion loss of the coexistence filter, which reduces the transmission quality of the WiFi signal.

In this embodiment, when the WiFi radio frequency circuit 20 working in the first frequency band and the cellular radio frequency circuit 30 working in the second frequency band are working at the same time, two cellular front-end circuits are provided, and can also be switched to the channel with the cellular coexistence filter. The coexistence filter filters out the adjacent WiFi signals of the first frequency band to meet the transmission quality requirements of the cellular signal, and when the WiFi radio frequency circuit 20 does not work, that is, does not send and receive WiFi signals of the first frequency band, two cellular front-end circuits are provided to Switch to the channel without the cellular coexistence filter to avoid the loss of insertion loss of the coexistence filter and reduce the transmission quality of the cellular signal.

The radio frequency circuit of this embodiment can be used for Customer Premise Equipment (CPE for short), which can well solve the mutual interference of signals when the cellular radio frequency circuit in the N79 frequency band and the WiFi radio frequency circuit in the 5G frequency band existing in the CPE work at the same time. In addition, when the cellular RF circuit in the N79 band and the WiFi RF circuit in the 5G band do not need to work at the same time, the high insertion loss of the coexistence filter can be avoided, and the performance of the N79 and WiFi 5G RF link can be improved.

It should be noted that it is also possible to set only a WiFi front-end circuit with two channels in the WiFi radio frequency circuit, or a cellular front-end circuit with two channels only in the cellular radio frequency circuit. Or the WiFi radio frequency circuit can use other methods to avoid interference, such as setting only the path with the coexistence filter in the front-end circuit, which can still achieve good results as a whole.

In an exemplary embodiment of the present disclosure, the first frequency band is a 5G frequency band, and the second frequency band is an N79 frequency band; or, the first frequency band is a 2.4G frequency band, and the second frequency band is a B40 frequency band; Alternatively, the first frequency band is the 2.4G frequency band, and the second frequency band is the B41 frequency band.

The following embodiments of the present disclosure are described by taking the first frequency band as the 5G frequency band and the second frequency band as the N79 frequency band for illustration. However, these embodiments are also applicable to the 2.4G frequency band as the first frequency band and the B40 frequency band as the second frequency band. , and the first frequency band is the 2.4G frequency band, and the second frequency band is the B41 frequency band.

In an exemplary embodiment of the present disclosure, please refer to FIG. 1 , the WiFi front-end circuit 203 provided with two channels includes a WiFi front-end module 2031, a WiFi switch 2033, a WiFi coexistence filter 2037, a first WiFi antenna 2035, and a first WiFi antenna 2035. Two WiFi antennas 2039, wherein the WiFi switch 2033 is set to respond to the first WiFi path control signal, turn on the path formed by the WiFi front-end module 2031 and the first WiFi antenna 2035 without the WiFi coexistence filter, or, in response to the second WiFi coexistence filter The WiFi channel control signal turns on the WiFi coexistence filter channel formed by the WiFi front-end module 2031 , the WiFi coexistence filter 2037 and the second WiFi antenna 2039 .

In an example of this embodiment, the WiFi switch 2033 is a SPDT switch, the fixed end of the SPDT switch is connected to the WiFi front-end module 2031, the first switch is connected to the first WiFi antenna 2035, and the second switch is connected to the WiFi front-end module 2031. The end is connected to one end of the WiFi coexistence filter 2037 , and the other end of the WiFi coexistence filter 2037 is connected to the second WiFi antenna 2039 .

In an example of this embodiment, the WiFi transceiver 201 is configured to send a first WiFi channel control signal to the WiFi switch 2033 when it is detected that the cellular communication does not work in the N79 frequency band (including the case where the cellular communication does not work), Connect the channel without the WiFi coexistence filter, at this time the WiFi front-end module 2031 is connected with the WiFi coexistence filter 2037 and the second WiFi antenna 2039, and the received signal will be filtered by the WiFi coexistence filter to suppress the interference of the cellular signal in the N79 frequency band; And when it is detected that the cellular communication works in the N79 frequency band, the second WiFi channel control signal is sent to the WiFi switch 2033, and the channel with the WiFi coexistence filter is connected, and the WiFi front-end module 2031 is connected to the first WiFi antenna 2035 at this time. , because the cellular communication will not transmit the cellular signal of the N79 frequency band at this time, and there is no adjacent frequency interference, the signal received by the first WiFi antenna 2035 does not need to be filtered by the WiFi coexistence filter.

Although this example is that the WiFi transceiver 201 sends the first WiFi path control signal and the second WiFi path control signal to the WiFi switch 2033, this is only exemplary. For example, in other examples, the processor 10 may also send the first WiFi path control signal and the second WiFi path control signal to the WiFi switch 2033 . The first WiFi channel control signal and the second WiFi channel control signal may correspond to two different values of the same channel control signal, for example, when the value is 1, it is the first WiFi channel control signal, and when the value is 0, it is the second WiFi channel control signal, or vice versa. In FIG. 1 , the WiFi transceiver 201 sends the first WiFi channel control signal and the second WiFi channel control signal to the WiFi switch 2033 through a general-purpose input/output (GPIO) interface, but also Can be sent over other types of interfaces.

In an exemplary embodiment of the present disclosure, please refer to FIG. 1 , the cellular front-end circuit 303 provided with two channels includes a cellular front-end module 3031, a cellular switch 3033, a cellular coexistence filter 3037, a first cellular antenna 3035, and a first cellular antenna 3035. Two cellular antennas 3039, wherein the cellular switching switch 3033 is set to turn on the path formed by the cellular front-end module 3031 and the first cellular antenna 3035 without the cellular coexistence filter in response to the first cellular path control signal, or, in response to the second cellular antenna 3035 The cellular channel control signal is used to connect the cellular front-end module 3031 , the cellular coexistence filter 3037 and the second cellular antenna 3039 to the channel with the cellular coexistence filter.

In an example of this embodiment, the cellular switch 3033 is a SPDT switch, the fixed end of the SPDT switch is connected to the cellular front-end module 3031, the first switching end is connected to the first cellular antenna 3035, and the second switching The end is connected to one end of the cellular coexistence filter 3037 , and the other end of the cellular coexistence filter 3037 is connected to the second cellular antenna 3039 .

In an example of this embodiment, the cellular transceiver 301 is configured to send the first cellular channel control signal to the cellular switch 3033 when it is detected that the WiFi communication is not working in the 5G frequency band (including the case where the WiFi communication is not working), Turn on the channel without the cellular coexistence filter. At this time, the cellular front-end module 3031 is connected to the cellular coexistence filter 3037 and the second cellular antenna 3039. The received signal will be filtered by the cellular coexistence filter to suppress the interference of the WiFi signal in the G5 frequency band; And when it is detected that the WiFi communication works in the G5 frequency band, the second cellular channel control signal is sent to the cellular switch 3033, and the channel with the cellular coexistence filter is connected, and the cellular front-end module 3031 is connected to the first cellular antenna 3035. , because at this time the WiFi communication will not transmit the WiFi signal in the G5 frequency band, and there is no adjacent frequency interference, the signal received by the first cellular antenna 3035 may not be filtered by the cellular coexistence filter.

Although the present example is of the cellular transceiver 301 sending the first cellular path control signal and the second cellular path control signal to the cellular switch 3033, this is merely exemplary. For example, in other examples, the processor 10 may also send the first cellular access control signal and the second cellular access control signal to the cellular switch 3033 . The first cellular access control signal and the second cellular access control signal may correspond to two different values of the same access control signal. In FIG. 1 , the cellular transceiver 301 sends the first cellular channel control signal and the second cellular channel control signal to the cellular switch 3033 through the GPIO interface, but it is not limited thereto.

An embodiment of the present disclosure further provides an electronic device, the electronic device comprising:

equipment body;

According to the radio frequency circuit according to any embodiment of the present disclosure, the radio frequency circuit is disposed on the device body.

In an exemplary embodiment of the present disclosure, the electronic device is a customer premises equipment.

The WiFi transceiver 201 in the WiFi radio frequency circuit 20 may be configured to complete the conversion and inverse conversion process from digital signals to radio frequency signals. After the digital signal encoded by the processor 10 is sent to the WiFi transceiver 201, the corresponding WiFi signal is finally generated through the process of encapsulation into a frame, digital-to-analog signal conversion, modulation, and frequency up-conversion. Alternatively, the received WiFi signal goes through a series of inverse processes in the WiFi transceiver 201 such as frequency conversion, demodulation, analog-to-digital signal conversion, and decapsulation, and then is sent to the processor for decoding and subsequent signal processing. The WiFi front-end module 2031 in the WiFi front-end circuit 203 is configured to amplify the transmitted radio frequency signal to increase the transmit power and increase the transmission distance, and to amplify the received radio frequency signal through a low noise amplifier to improve the reception sensitivity and increase the reception distance. It is used to feed back part of the transmit power connection to the WiFi transceiver 201 for power control. The first WiFi antenna 2035 and the second WiFi antenna 2039 in the WiFi front end circuit 203 are arranged to convert the conducted signals into wireless signals for transmission into the air.

The cellular transceiver 301 in the cellular radio frequency circuit 30 performs functions similar to the WiFi transceiver 201 . The functions of the front-end module 2031 , the first WiFi antenna 2035 and the second WiFi antenna 2039 are also similar, except that the transmitted signals are cellular signals instead of WiFi signals. I won't go into details here.

In an example of this embodiment, the two WiFi antennas of the same WiFi front-end circuit 203 and the two cellular antennas of the same cellular front-end circuit 303 can be set close to each other, so that the environments of the two antennas are similar, and the environment (For example, the environment where one antenna is located has no obstructions and the spherical environment where the other antenna is located has obstructions), resulting in sudden changes in the quality of data transmission.

Coexistence filters can provide high isolation, high rejection between frequency bands. The WiFi coexistence filter in this paper can pass the WiFi signal in the first frequency band (such as the 5G frequency band), and at the same time, the suppression capability of the cellular signal in the second frequency band (such as the N79 frequency band) can meet the requirement of at least 25dB. Similarly, the cellular coexistence filter in this paper can pass cellular signals in the second frequency band (such as the N79 frequency band), and at the same time, the suppression capability of the WiFi signal in the first frequency band (such as the 5G frequency band) can meet the requirement of at least 25dB. In one example, the WiFi coexistence filter has a suppression capability of 35dB for the entire frequency band of N79, and the cellular coexistence filter has a suppression capability of 35dB for the entire WiFi 5G band.

The example of FIG. 1 shows two WiFi front-end circuits 203, the two WiFi front-end circuits 203 have the same structure, and both include a path without a WiFi coexistence filter and a path with a WiFi coexistence filter, but in other examples of the present disclosure, There may also be some WiFi front-end circuits in the WiFi radio frequency circuit 20 that only have a path with or without a WiFi coexistence filter. Similarly, FIG. 1 shows two cellular front-end circuits 303, the two cellular front-end circuits 303 have the same structure, and both include a path without a cellular coexistence filter and a path with a cellular coexistence filter, but the present disclosure is not limited to this . There may also be some cellular front-end circuits in the cellular radio circuit 30 that are only provided with paths without cellular coexistence filters.

In an exemplary embodiment of the present disclosure, the antenna isolation between the WiFi antenna in the WiFi front-end circuit provided with two channels and the at least one cellular antenna in the cellular radio frequency circuit operating in the N79 frequency band is smaller than a preset the communication isolation threshold; the antenna isolation between the cellular antenna in the cellular front-end circuit with two channels and at least one WiFi antenna in the WiFi radio circuit operating in the 5G frequency band is less than the preset communication isolation threshold .

The WiFi radio frequency circuit working in the 5G frequency band in this embodiment may include 2 or 3 or 4 or more WiFi front-end circuits; the cellular radio frequency circuit working in the N79 frequency band may include 1 or 2 or 3 or 4 or More cellular front-end circuits. Some of these WiFi front-end circuits may only be provided with paths without WiFi coexistence filters, and some of these cellular front-end circuits may be provided with only paths without cellular coexistence filters. For example, if space permits, the distance between a cellular antenna in a cellular front-end circuit and a WiFi antenna in a WiFi front-end circuit is far enough that the antenna isolation between the two can meet the preset communication isolation threshold, then the The cellular front-end circuit and the WiFi front-end circuit may only have paths without coexistence filters. The communication isolation threshold is the lower limit of the allowable isolation between the antennas under the condition that the signal transmission between the antennas will not cause mutual interference, which can be expressed by the distance between the antennas. The engineering experience or experimental simulation data in the WIFI 5G coexistence scenario is preset.

In the example shown in FIG. 2 , the WiFi radio circuit 20 includes two WiFi front-end circuits, and one WiFi front-end circuit 203 includes two paths, namely, a path with the WiFi coexistence filter 2037 and a path without the WiFi coexistence filter 2037 . Another WiFi front-end circuit 203 ′ is only provided with a path without a WiFi coexistence filter, and the WiFi antenna in the WiFi front-end circuit 203 ′ and the cellular antenna in the cellular radio frequency circuit 30 operating in the N79 frequency band both satisfy the antenna isolation degree. Require. Similarly, the cellular radio frequency circuit 30 includes two cellular front-end circuits, one of which is a cellular front-end circuit 303 including two paths, namely a path with the cellular coexistence filter 3037 and a path without the cellular coexistence filter 3037, and the other cellular front-end circuit 303' only has two paths. A path without a cellular coexistence filter is provided, and the cellular antenna in the cellular front-end circuit 303' and the WiFi antenna in the WiFi radio circuit 20 operating in the 5G frequency band both meet the requirements of antenna isolation.

Although increasing the distance between the antennas of the WiFi RF circuit and the cellular RF circuit can avoid mutual interference between the antennas, there is often not enough space in actual products to meet this requirement, especially in the number and In the case of many types.

In order to solve the adjacent channel interference between the cellular signal in the N79 band and the WiFi in the 5G band, other solutions can also be used. Switch the WiFi working frequency band to other frequency bands such as 2.4 frequency band, and as long as the cellular communication works in the N79 frequency band, it is not allowed to switch the WiFi working frequency band back to the 5G frequency band. Alternatively, before triggering the WiFi communication to work in the 5G frequency band, make the cellular communication work in other frequency bands than the N79 frequency band. If the WiFi works in the 5G frequency band, it is not allowed to switch the working frequency band of the cellular communication to the N79 frequency band. In this way, by switching the frequency band of the cellular or WiFi, the cellular signal of the N79 frequency band and the WiFi signal of the 5G frequency band do not coexist, and adjacent frequency interference will not occur. In this way, the circumvention strategy will limit the working bandwidth of the device. At the same time, if the current network conditions only support the networking mode of cellular communication working in the N79 frequency band and WiFi working in the 5G frequency band, the device will be unavailable.

Another solution is to add a protection mechanism for coexistence to work in coexistence, such as when cellular communication works in the N79 band and WiFi works in the 5G band, restricting the transmission of cellular signals and not being able to receive WiFi signals, and WiFi The cellular signal cannot be received while the signal is being transmitted. Protection for low noise amplifiers (LNAs) can also be added. Such a scheme would result in a significant drop in traffic performance.

Another solution is to add high isolation coexistence filters to all channels of WiFi RF circuits operating in the 5G band and all channels of cellular RF circuits operating in the N79 band to prevent interference signals from falling into the corresponding frequency bands. , to achieve optimized demodulation performance. Since the N79 frequency band and the WiFi 5G frequency band are only 150MHz apart, in order to achieve the high isolation required for coexistence, the coexistence filter used often brings large insertion loss.

As shown in FIG. 3 , the radio frequency circuit includes a processor 50 , a WiFi radio frequency circuit 60 and a cellular radio frequency circuit 70 connected to the processor 50 . The WiFi radio frequency circuit 60 includes a WiFi transceiver 601 and a WiFi front-end circuit 603 , and each WiFi front-end circuit 603 includes a WiFi front-end module 6031 , a WiFi coexistence filter 6033 and a WiFi antenna 6035 . That is to say, the WiFi front-end circuit 603 is only provided with the path of the WiFi coexistence filter. The cellular radio frequency circuit 70 is similar to this, including a cellular transceiver 701 and a cellular front-end circuit 703. Each cellular front-end circuit 703 includes a cellular front-end module 7031, a cellular coexistence filter 7033 and a cellular antenna 7035. The cellular front-end circuit 703 is only provided with cellular Path of the coexistence filter. Although this solution can achieve the high isolation effect required for coexistence, the existing coexistence filter will generate an insertion loss close to 3 dB, resulting in a large insertion loss. Especially when the cellular communication does not work in the N79 frequency band, the WiFi coexistence filter will still exist on the receiving path of the WiFi signal, resulting in the degradation of the Wi-Fi performance. Alternatively, when WiFi operates in a non-5G frequency band (such as the 2.4G frequency band), the cellular coexistence filter will also exist on the receiving path of the cellular signal, causing the performance of cellular communication to degrade.

However, in the embodiment of the present disclosure, by dynamically switching the channel with the coexistence filter and the channel without the coexistence filter, in the case that the cellular communication works in the N79 frequency band and the WiFi communication works in the 5G frequency band at the same time, the working bandwidth of the device is not limited, Cellular communication and WiFi communication can also transmit and receive at the same time, and can avoid the insertion loss caused by the coexistence filter by switching to the channel without the coexistence filter when the two do not work in the N79 frequency band and the 5G frequency band at the same time. In this way, the transmission performance of WiFi signals and cellular signals can be guaranteed to the greatest extent.

An embodiment of the present disclosure further provides a signal transmission control method, which is implemented in an electronic device, and the electronic device includes the radio frequency circuit according to any embodiment of the present disclosure. As shown in FIG. 4 , the method includes the following operations The transmission control process of the WiFi signal in the first frequency band:

Step 110, determining the working frequency band of the cellular radio frequency circuit currently transmitting the signal of the electronic device;

Step 120, determine whether the working frequency band of the cellular radio frequency circuit currently transmitting the signal includes the second frequency band (such as the N79 frequency band), if the second frequency band is included, go to step 130, if the second frequency band is not included, go to step 140;

Step 130, when the working frequency band of the cellular radio frequency circuit currently transmitting the signal includes the second frequency band, control the WiFi front-end circuit provided with two paths to transmit the WiFi signal through the path with the WiFi coexistence filter, and end;

Step 140: Control the WiFi front-end circuit provided with two channels to transmit WiFi signals through the channel without the WiFi coexistence filter when the working frequency band of the cellular radio frequency circuit currently transmitting the signal does not include the second frequency band.

The method of this embodiment can control the WiFi front-end circuit provided with two channels to transmit WiFi signals through the channel with the WiFi coexistence filter when the cellular radio frequency circuit operates in the second frequency band, such as the N79 frequency band, thereby suppressing the cellular signal of the second frequency band interference. At the same time, when the cellular radio frequency circuit works in other frequency bands than the second frequency band, the WiFi front-end circuit with two channels can be controlled to transmit WiFi signals through the channel without WiFi coexistence filter, avoiding the interference caused by the WiFi coexistence filter. Therefore, the transmission performance of the WiFi signal can be guaranteed.

In an exemplary embodiment of the present disclosure, the transmission control process of the WiFi signal operating in the first frequency band further includes:

After controlling the WiFi front-end circuit provided with two channels to transmit the WiFi signal through the channel with the WiFi coexistence filter, when it is detected that the working frequency band of the cellular radio frequency circuit currently transmitting the signal does not include the second frequency band, the setting is controlled The WiFi front-end circuit with two channels is switched to transmit WiFi signals through the channel without WiFi coexistence filter;

After controlling the WiFi front-end circuit provided with two channels to transmit WiFi signals through the channel without the WiFi coexistence filter, and detecting that the working frequency band of the cellular radio frequency circuit currently transmitting the signal includes the second frequency band, control the WiFi front-end circuit provided with the WiFi coexistence filter. The WiFi front-end circuits of the two channels are switched to transmit WiFi signals through the channel with the WiFi coexistence filter.

In this embodiment, when the working frequency band of the cellular radio frequency circuit currently transmitting the signal changes, the corresponding channel switching is performed on the WiFi front-end circuit in time, so that good transmission performance can be obtained.

Controlling a WiFi front-end circuit with two channels to transmit WiFi signals through a channel with a WiFi coexistence filter or a channel without a WiFi coexistence filter can be achieved by sending the corresponding WiFi channel control signal to the WiFi switch in the WiFi front-end circuit , the WiFi channel control signal can be generated and sent by a WiFi transceiver or a processor in the electronic device.

In an exemplary embodiment of the present disclosure, as shown in FIG. 5 , the method further includes the following transmission control process of the cellular signal operating in the second frequency band:

Step 210, determining the working frequency band of the WiFi radio frequency circuit of the current transmission signal of the electronic device;

Step 220, judging whether the working frequency band of the WiFi radio frequency circuit currently transmitting the signal includes the first frequency band, if it includes the first frequency band, go to step 230, if it does not include the first frequency band, go to step 240;

Step 230, in the case that the working frequency band of the WiFi radio frequency circuit of the current transmission signal includes the first frequency band, control the cellular front-end circuit provided with two paths to transmit the cellular signal through the path with the cellular coexistence filter, and end;

Step 240 , when the working frequency band of the WiFi radio frequency circuit currently transmitting the signal does not include the first frequency band, control the cellular front-end circuit provided with two channels to transmit the cellular signal through the channel without the cellular coexistence filter.

The method of this embodiment can control the cellular front-end circuit provided with two channels to transmit cellular signals through the channel with the cellular coexistence filter when the WiFi radio frequency circuit works in the first frequency band, such as the 5G frequency band, thereby suppressing the WiFi signal in the first frequency band interference. At the same time, when the WiFi radio frequency circuit works in other frequency bands than the first frequency band, the cellular front-end circuit with two channels can be controlled to transmit the cellular signal through the channel without the cellular coexistence filter, so as to avoid the interference caused by the cellular coexistence filter. loss, so as to ensure the transmission performance of the cellular signal.

In an exemplary embodiment of the present disclosure, the transmission control process of the cellular signal operating in the second frequency band further includes:

After controlling the cellular front-end circuit provided with two channels to transmit the cellular signal through the channel with the cellular coexistence filter, it is detected that the working frequency band of the WiFi radio frequency circuit currently transmitting the signal does not include the first frequency band, and the setting is controlled A cellular front-end circuit with two paths transmits the cellular signal through the path without the cellular coexistence filter;

After controlling the cellular front-end circuit provided with two channels to transmit the cellular signal through the channel without the cellular coexistence filter, when it is detected that the working frequency band of the WiFi radio frequency circuit currently transmitting the signal includes the first frequency band, the control is provided with the The two-path cellular front-end circuit transmits the cellular signal through the path with the cellular coexistence filter.

In this embodiment, when the working frequency band of the WiFi radio frequency circuit currently transmitting the signal changes, the cellular front-end circuit is switched correspondingly in time, so that good transmission performance can be obtained.

Controlling a cellular front-end circuit with two channels to transmit cellular signals through a channel with a cellular coexistence filter or a channel without a cellular coexistence filter can be achieved by sending a corresponding cellular channel control signal to the cellular switch in the cellular front-end circuit , the cellular path control signal may be generated and transmitted by a cellular transceiver or a processor in the electronic device.

An embodiment of the present disclosure further provides a signal transmission control device, as shown in FIG. 6 , including a memory 90 and a processor 80 , the memory 90 stores a computer program, and when the processor 80 executes the computer program The signal transmission control method according to any embodiment of the present disclosure can be implemented. The processor 80 in this embodiment may be a general-purpose processor, for example, a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it may also be a digital signal processor (DSP) , Application Specific Integrated Circuits (ASICs), Off-the-Shelf Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The memory 90 in this embodiment may include RAM, ROM, EEPROM, CD-ROM, or other optical disk storage devices, magnetic disk storage devices, or other magnetic storage devices, flash memory, or may store required data in the form of instructions or data structures program code and any other medium that can be accessed by a computer.

The signal transmission control apparatus in this embodiment may be implemented by a processor or integrated in a radio frequency circuit, or some functions may be implemented by a processor, and some functions may be integrated in the radio frequency circuit. When integrated in a radio frequency circuit, it can be integrated in a WiFi transceiver in a WiFi radio frequency circuit and a cellular transceiver in a cellular radio frequency circuit.

In an example of this embodiment, the electronic device is a customer premise equipment (Customer Premise Equipment, CPE for short). CPE is a mobile signal access device that receives mobile signals and forwards them with wireless WIFI signals. CPE can convert high-speed 4G/5G signals into WiFi signals, and the number of mobile terminals that can support simultaneous Internet access is also large. CPE can be widely used in rural areas, towns, hospitals, units, factories, communities, etc. It can be used for wireless network access, which can save broadband costs and eliminate wiring links. 5G CPE can perform secondary relay of mobile phone signals (such as 5G/4G signals). Turn the received 5G/4G signal into a WiFi signal and provide it to the devices around you. The CPE is used to perform secondary relay of the operator's network signal. When the method and device of the above embodiments of the present disclosure are used for CPE, the interference between the cellular signal of the N79 frequency band and the WiFi signal of the 5G frequency band that exist in the CPE can be well resolved when working at the same time, and can be avoided when the simultaneous working is not required The high insertion loss of the coexistence filter improves the performance of the N79 and WiFi 5G RF links.

An embodiment of the present disclosure further provides a computer program product, including the computer program, which implements the signal transmission control method according to any embodiment of the present disclosure when the computer program is executed by a processor.

An embodiment of the present disclosure further provides a non-transitory computer-readable storage medium, where the computer-readable storage medium stores a computer program, wherein, when the computer program is executed by a processor, any implementation of the present disclosure is implemented The signal transmission control method described in the example.

In any one or more of the above-described exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium and executed by a hardware-based processing unit. Computer-readable media may include computer-readable storage media corresponding to tangible media, such as data storage media, or communication media including any medium that facilitates transfer of a computer program from one place to another, eg, according to a communication protocol. In this manner, a computer-readable medium may generally correspond to a non-transitory, tangible computer-readable storage medium or a communication medium such as a signal or carrier wave. Data storage media can be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, code and/or data structures for implementing the techniques described in this disclosure. The computer program product may comprise a computer-readable medium.

By way of example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk or other magnetic storage, flash memory, or may be used to store instructions or data Any other medium in the form of a structure that stores the desired program code and that can be accessed by a computer. Moreover, any connection is also termed a computer-readable medium if, for example, a connection is made from a website, server, or other remote sources transmit instructions, coaxial cable, fiber optic cable, twine, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. It should be understood, however, that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transitory (transitory) media, but are instead directed to non-transitory, tangible storage media. As used herein, magnetic disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks, or Blu-ray disks, etc., where disks typically reproduce data magnetically, while optical disks use lasers to Optically reproduce data. Combinations of the above should also be included within the scope of computer-readable media.

By way of example, and not limitation, may be implemented by, for example, one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits, etc. One or more processors to execute instructions. Accordingly, the term "processor," as used herein may refer to any of the foregoing structure or any other structure suitable for implementation of the techniques described herein. Additionally, in some aspects, the functionality described herein may be provided within dedicated hardware and/or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.

The technical solutions of the embodiments of the present disclosure may be implemented in a wide variety of devices or apparatuses, including a wireless handset, an integrated circuit (IC), or a set of ICs (eg, a chip set). Various components, modules, or units are described in the disclosed embodiments to emphasize functional aspects of devices configured to perform the described techniques, but do not necessarily require realization by different hardware units. Rather, as described above, the various units may be combined in codec hardware units or provided by a collection of interoperating hardware units (including one or more processors as described above) in conjunction with suitable software and/or firmware.

Claims (11)

1. a radio frequency circuit, it is characterized in that, comprise the WiFi radio frequency circuit that works in the first frequency band and the cellular radio frequency circuit that works in the second frequency band, the WiFi signal of described first frequency band and the cellular signal of described second frequency band are mixed; There is adjacent channel interference between the two, where: The WiFi radio frequency circuit operating in the first frequency band includes a WiFi transceiver and one or more WiFi front-end circuits, wherein at least one WiFi front-end circuit is provided with two paths: a path without a WiFi coexistence filter and a path with a WiFi coexistence filter. path, and can switch between the path without the WiFi coexistence filter and the path with the WiFi coexistence filter; The cellular radio frequency circuit operating in the second frequency band includes a cellular transceiver and one or more cellular front-end circuits, wherein at least one cellular front-end circuit is provided with two paths: a path without a cellular coexistence filter and a path with a cellular coexistence filter. and can switch between the path without the cellular coexistence filter and the path with the cellular coexistence filter. 2. radio frequency circuit as claimed in claim 1 is characterized in that: The first frequency band is the 5G frequency band, and the second frequency band is the N79 frequency band; or The first frequency band is the 2.4G frequency band, and the second frequency band is the B40 frequency band; or The first frequency band is the 2.4G frequency band, and the second frequency band is the B41 frequency band. 3. radio frequency circuit as claimed in claim 1 is characterized in that: The WiFi front-end circuit provided with two channels includes a WiFi front-end module, a WiFi switch, a WiFi coexistence filter, a first WiFi antenna and a second WiFi antenna, wherein the WiFi switch is set to respond to the first WiFi channel A control signal to turn on the channel without the WiFi coexistence filter formed by the WiFi front-end module and the first WiFi antenna, or in response to the second WiFi channel control signal, turn on the WiFi front-end module, the WiFi coexistence filter and the WiFi coexistence filter. The second WiFi antenna forms the path with the WiFi coexistence filter. 4. radio frequency circuit as claimed in claim 3, is characterized in that: The WiFi switch is a SPDT switch, the fixed end of the SPDT switch is connected to the WiFi front-end module, the first switch is connected to the first WiFi antenna, and the second switch is coexisting with the WiFi One end of the filter is connected, and the other end of the WiFi coexistence filter is connected to the second WiFi antenna. 5. radio frequency circuit as claimed in claim 3, is characterized in that: The WiFi transceiver is configured to send the first WiFi path control signal to the WiFi switch to turn on the path of the non-WiFi coexistence filter when detecting that the cellular communication is not operating in the second frequency band; and When it is detected that the cellular communication works in the second frequency band, the second WiFi channel control signal is sent to the WiFi switch to turn on the channel with the WiFi coexistence filter. 6. The radio frequency circuit of claim 1, wherein: The cellular front-end circuit provided with two paths includes a cellular front-end module, a cellular switch, a cellular coexistence filter, a first cellular antenna, and a second cellular antenna, wherein the cellular switch is configured to respond to the first cellular path a control signal to turn on the path without the cellular coexistence filter formed by the cellular front-end module and the first cellular antenna, or turn on the cellular front-end module, the cellular coexistence filter and the cellular coexistence filter in response to the second cellular path control signal The second cellular antenna forms the path with the cellular coexistence filter. 7. The radio frequency circuit of claim 6, wherein: The cellular switch is a single-pole double-throw switch, the fixed end of the single-pole double-throw switch is connected to the cellular front-end module, the first switching end is connected to the first cellular antenna, and the second switching end coexists with the cellular One end of the filter is connected, and the other end of the cellular coexistence filter is connected to the second cellular antenna. 8. The radio frequency circuit of claim 6, wherein: The cellular transceiver is configured to send the first cellular path control signal to the cellular switch to turn on the path without the cellular coexistence filter when detecting that the WiFi communication is not operating in the first frequency band; and When it is detected that the WiFi communication works in the first frequency band, the second cellular channel control signal is sent to the cellular switch to turn on the channel with the cellular coexistence filter. 9. The radio frequency circuit of claim 1, wherein: The antenna isolation between the WiFi antenna in the WiFi front-end circuit provided with two channels and the at least one cellular antenna in the cellular radio frequency circuit operating in the second frequency band is less than a preset communication isolation threshold; Antenna isolation between the cellular antenna in the cellular front-end circuit provided with two channels and at least one WiFi antenna in the WiFi radio frequency circuit operating in the first frequency band is less than a preset communication isolation threshold. 10. An electronic device, characterized in that the electronic device comprises: equipment body; The radio frequency circuit according to any one of claims 1 to 9, wherein the radio frequency circuit is arranged on the device body. 11. The electronic device of claim 10, wherein: The electronic equipment is customer premise equipment.

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