CN106330220B - Signal receiving method and device and communication equipment - Google Patents
Signal receiving method and device and communication equipment Download PDFInfo
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Abstract
The invention provides a signal receiving method and device and communication equipment, wherein the method comprises the following steps: receiving signals by a receiving antenna and inputting the signals to a frequency selection filter; the frequency selection filter outputs signals of different frequency bands to corresponding transmission branches; the transmission branch utilizes an adjustable gain amplifier and a noise suppression filter which are connected in sequence to process signals and then outputs the signals to a combiner; the combiner processes the input signals of all transmission branches and outputs the input signals to the radio frequency sampler; and the radio frequency sampler processes the combiner and then outputs the combiner to a signal processing device in the equipment. The implementation of the invention can realize the simultaneous receiving of multiple frequency bands, and because the transmission branches are mutually independent, the invention can realize that when a blocking signal exists in one frequency band, the other frequency band still can realize the receiving sensitivity performance, the invention has simple structure, lower power consumption and PCB occupation area, is beneficial to the miniaturization of a base station and improves the applicability of the multiple frequency band receiving technology.
Description
Technical Field
The present invention relates to the field of signal reception, and in particular, to a signal receiving method and apparatus, and a communication device.
Background
With the increasing demand of wireless communication systems for multi-band and integration, base station systems are developing towards the trend of small size, large bandwidth and multi-band. The requirements for dual band receivers are currently implemented in two ways: as shown in fig. 1, due to the limitation of the bandwidth of the intermediate frequency adjustable gain amplifier, the bandwidth of the receiving ADC and the requirement of independent control of the gain of each frequency band transmission branch, only one single frequency band transmission branch can be duplicated, which brings about the problems of large number of devices, large occupied area, large power consumption, and unsatisfied with the requirement of a miniaturized base station, and the applicability of the existing dual-frequency band receiving method is poor.
Therefore, how to provide a signal receiving method with improved applicability is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a signal receiving method and device and communication equipment, and aims to solve the problem of poor applicability of the prior art.
The invention provides a signal receiving method, which comprises the following steps: receiving signals by a receiving antenna and inputting the signals to a frequency selection filter; the frequency selection filter outputs signals of different frequency bands to corresponding transmission branches; the transmission branch utilizes an adjustable gain amplifier and a noise suppression filter which are connected in sequence to process signals and then outputs the signals to a combiner; the combiner processes the input signals of all transmission branches and outputs the input signals to the radio frequency sampler; and the radio frequency sampler processes the combiner and then outputs the combiner to a signal processing device in the equipment.
Furthermore, the transmission branch also comprises a low noise amplifier, and the output signal of the frequency selective filter is output to the adjustable gain amplifier after being processed by the low noise amplifier.
Furthermore, the frequency selective filter comprises a receiving duplexer frequency selective filter, and the number of the transmission branches is two.
Further, the method also comprises the following steps: and calculating and controlling the suppression degree of the noise suppression filter in each transmission branch.
Further, the method also comprises the following steps: and controlling the attenuation of the adjustable gain amplifier in each transmission branch by calculating in each transmission branch and controlling according to the output power of the radio frequency sampler and the output power of each transmission branch.
The present invention also provides a signal receiving apparatus, comprising: the device comprises a receiving antenna, a frequency selection filter, at least two transmission branches, a combiner and a radio frequency sampler; the transmission branches comprise an adjustable gain amplifier and a noise suppression filter which are connected in sequence; the input end of the frequency selective filter is connected with the receiving antenna and comprises a plurality of output ends with different output frequency bands, and each output end is connected to the input end of the corresponding transmission branch; the output end of the transmission branch is connected to the input end of the combiner; the output end of the combiner is connected with the input end of the radio frequency sampler, and the output end of the radio frequency sampler is connected with a signal processing device in the equipment.
Furthermore, the transmission branch also comprises a low noise amplifier, the input end of the low noise amplifier is connected with the output end of the frequency selective filter, and the output end of the low noise amplifier is connected with the input end of the adjustable gain amplifier.
Furthermore, the frequency selective filter comprises a receiving duplexer frequency selective filter, and the number of the transmission branches is two.
Furthermore, the device also comprises a calculation module, wherein the calculation module is used for calculating and controlling the suppression degree of the noise suppression filter in each transmission branch.
And the control module is used for controlling the attenuation of the adjustable gain amplifier in each transmission branch by calculating and controlling the attenuation in each transmission branch according to the output power of the radio frequency sampler and the output power of each transmission branch.
The invention also provides a communication device which comprises the signal processing device and the signal receiving device provided by the invention.
The invention has the beneficial effects that:
the invention provides a signal receiving method, which can realize the simultaneous receiving of multiple frequency bands, and can realize the receiving sensitivity performance of the other frequency band when a blocking signal exists in one frequency band because transmission branches are mutually independent, the invention has simple structure, lower power consumption and PCB occupation area, is beneficial to the miniaturization of a base station and improves the applicability of the multiple frequency band receiving technology.
Drawings
Fig. 1 is a schematic structural diagram of a conventional signal receiving apparatus;
fig. 2 is a schematic structural diagram of a signal receiving apparatus according to a first embodiment of the present invention;
fig. 3 is a flowchart of a signal receiving method according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a signal receiving apparatus according to a third embodiment of the present invention;
fig. 5 is a flowchart of a signal receiving method according to a third embodiment of the present invention.
Detailed Description
The invention will now be further explained by means of embodiments in conjunction with the accompanying drawings.
The first embodiment:
fig. 2 is a schematic structural diagram of a signal receiving apparatus according to a first embodiment of the present invention, and as can be seen from fig. 2, in this embodiment, a signal receiving apparatus 1 according to the present invention includes: a receiving antenna 11, a frequency selective filter 12, at least two transmission branches 13, a combiner 14 and a radio frequency sampler 15; the transmission branches 13 each include an adjustable gain amplifier 131 and a noise suppression filter 132 connected in sequence; the input end of the frequency selective filter 12 is connected to the receiving antenna 11, and includes a plurality of output ends with different output frequency bands, and each output end is connected to the input end of the corresponding transmission branch 13; the output end of the transmission branch 13 is connected to the input end of the combiner 14; the output end of the combiner 14 is connected with the input end of the radio frequency sampler 15, and the output end of the radio frequency sampler 15 is connected with a signal processing device in the device.
In some embodiments, the transmission branch 13 in the above embodiments further includes a low noise amplifier, an input terminal of the low noise amplifier is connected to the output terminal of the frequency selective filter 12, and an output terminal of the low noise amplifier is connected to the input terminal of the adjustable gain amplifier 131.
In some embodiments, the frequency selective filter 12 in the above embodiments includes a receiving duplexer frequency selective filter, and the number of the transmission branches 13 is two.
In some embodiments, the signal receiving apparatus 1 in the above embodiments further includes a calculating module, which is configured to calculate and control the suppression degree of the noise suppression filter in each transmission branch 13.
In some embodiments, the signal receiving apparatus 1 in the above embodiments further includes a control module, and the control module is configured to control the attenuation of the adjustable gain amplifier in each transmission branch 13 and calculate and control the attenuation in each transmission branch 13 according to the output power of the rf sampler and the output power of each transmission branch 13.
Correspondingly, the invention also provides communication equipment which comprises the signal processing device and the signal receiving device provided by the invention. Generally, the communication device is a base station or the like.
Second embodiment:
fig. 3 is a flowchart of a signal receiving method according to a second embodiment of the present invention, and as can be seen from fig. 3, in this embodiment, the signal receiving method according to the present invention includes the following steps:
s301: receiving signals by a receiving antenna and inputting the signals to a frequency selection filter;
s302: the frequency selection filter outputs signals of different frequency bands to corresponding transmission branches;
s303: the transmission branch utilizes an adjustable gain amplifier and a noise suppression filter which are connected in sequence to process signals and then outputs the signals to a combiner;
s304: the combiner processes the input signals of all transmission branches and outputs the input signals to the radio frequency sampler;
s305: and the radio frequency sampler processes the combiner and then outputs the combiner to a signal processing device in the equipment.
In some embodiments, the transmission branch in the above embodiments further includes a low noise amplifier, and the output signal of the frequency selective filter is processed by the low noise amplifier and then output to the adjustable gain amplifier.
In some embodiments, the frequency selective filter in the above embodiments includes a receiving duplexer frequency selective filter, and the number of the transmission branches is two.
In some embodiments, the above embodiments further comprise: and calculating and controlling the suppression degree of the noise suppression filter in each transmission branch.
In some embodiments, the above embodiments further comprise: and controlling the attenuation of the adjustable gain amplifier in each transmission branch by calculating in each transmission branch and controlling according to the output power of the radio frequency sampler and the output power of each transmission branch.
The present invention will now be further explained with reference to specific application scenarios.
The third embodiment:
the present embodiment is further explained with reference to specific application scenarios.
Fig. 4 is a schematic structural diagram of a signal receiving apparatus according to a third embodiment of the present invention, and as can be seen from fig. 4, in this embodiment, the signal receiving apparatus according to the present invention includes:
the radio frequency sampler comprises a receiving antenna 11, a frequency selective filter 12, at least two transmission branches 13, a combiner 14, a radio frequency sampler 15, a calculation module 16 and a control module 17; the transmission branches 13 each include a low noise amplifier 133, an adjustable gain amplifier 131, and a noise suppression filter 132 connected in sequence; the input end of the frequency selective filter 12 and the receiving antenna 11, and includes a plurality of output ends with different output frequency bands, and each output end is connected to the input end of the corresponding transmission branch 13; the output end of the transmission branch 13 is connected to the input end of the combiner 14; the output end of the combiner 14 is connected with the input end of the radio frequency sampler 15, and the output end of the radio frequency sampler 15 is connected with a signal processing device in the device.
Fig. 5 is a schematic structural diagram of a signal receiving method according to a third embodiment of the present invention, and as can be seen from fig. 5, in this embodiment, the signal receiving method according to the present invention includes:
s501: the frequency selective filter separates the dual-band signals received by the receiving antenna to the corresponding transmission branches.
S502: and the low-noise amplifier respectively performs low-noise power amplification on the received small signals of the two frequency bands.
S503: the adjustable gain amplifier performs gain processing on the signal under the control of the control module.
Specifically, the adjustable gain amplifier module is respectively used for gain adjustment of the two frequency band receivers, gain attenuation is performed when a large blocking signal is input, and gain amplification is performed when a small sensitivity signal is input.
The method comprises the following substeps:
51-1: the control module calculates the saturation power output power level of the radio frequency sampler RFADC, wherein the power level refers to the total power of two frequency bands; setting an attenuation threshold and an attenuation step of an adjustable gain amplifier AGC according to the peak-to-average ratio of a system signal;
51-2: the control module reads whether the power level detected by the PD1 reaches the attenuation threshold, if so, the 51-3 is executed, otherwise, the 51-2 is executed again;
51-3: reading power levels of a PD2 detection point and a PD3 detection point, and judging whether the power at the PD2 is larger than the detection power + Z at the PD3, wherein the Z is selected to be a proper value according to specific system design, if so, executing 51-4, and if not, executing 51-5;
51-4: an adjustable gain amplifier on a frequency band 1 link is attenuated according to attenuation stepping, and then 51-2 is executed to detect whether an attenuation threshold is reached;
51-5: judging whether the power at the PD3 is larger than the detection power + Z at the PD2, if so, executing 51-6, and if not, executing 51-7;
51-6: attenuating an adjustable gain amplifier on a frequency band 2 link according to attenuation stepping, and then executing 51-2 to detect whether an attenuation threshold is reached;
51-7: the adjustable gain amplifiers on the two frequency band links are attenuated step by step according to the attenuation, and then 61-2 is executed to detect whether the attenuation threshold is reached.
Correspondingly, the step further comprises a gain callback process:
52-1: setting a proper gain callback threshold according to system requirements;
52-2: reading the detected power at the PD1 to see if a gain backoff threshold is found, if so, executing 52-3, and if not, executing 52-2 again;
52-3: judging whether the power at the PD2 is larger than the detection power + Z at the PD3, if so, executing 52-4, and if not, executing 52-7;
52-4: judging whether the attenuation of the link of the frequency band 2 is 0dB or not, if so, executing 52-5, and if not, executing 52-6;
52-5: the gain on the link of the frequency band 1 is adjusted back, the step is adjusted back to be the attenuation step, and then 52-3 is executed again;
52-6: the gain on the link of the frequency band 2 is adjusted back, the step is adjusted back to be the attenuation step, and then 52-3 is executed again;
52-7: judging whether the power at the PD3 is larger than the detection power + Z at the PD2, if so, executing 52-8, and if not, executing 52-11;
52-8: judging whether the attenuation of a link in which the frequency band 1 is positioned is 0dB, if so, executing 52-9, and if not, executing 52-10;
52-9: the gain on the link of the frequency band 2 is adjusted back, the step is adjusted back to be the attenuation step, and then 52-3 is executed again;
52-10: the gain on the link of the frequency band 1 is adjusted back, the step is adjusted back to be the attenuation step, and then 52-3 is executed again;
52-11: respectively calling back gains on the two frequency band links, calling back the step to be an attenuation step, and then executing 52-3 again;
s504: the noise suppression filter carries out filtering processing under the control of the computing module.
The calculation module respectively calculates the minimum gains under the sensitivity required by the two frequency band transmission branches according to the low noise performance of the RFADC; according to the saturation power level of the RFADC and the blocking level in the air interface band required by the two frequency bands, respectively calculating the maximum gain under blocking required by the transmission branches of the two frequency bands; and extracting the maximum value required by the gain attenuation amount under the blocking condition of the two frequency bands.
Under the blocking level of the frequency band 2, the gain attenuation of the transmission branch is X2, the in-band non-blocking input level of the frequency band 1 is the sensitivity signal power, the link non-attenuation noise coefficient of the frequency band 1 is NF1, the gain is G1, the noise coefficient of the link after the gain attenuation of the frequency band 2 is NF2, and the gain is G2; defining the suppression degree of the frequency band 1 filter in the frequency range of the frequency band 2 as A1 (positive value), and the suppression degree of the frequency band 2 filter in the frequency range of the frequency band 1 as A2 (positive value); calculating the thermal noise level of the analog link of the frequency band 1 in the frequency range of-174 dBm/Hz + NF1+ G1-A1 before the combiner, and the thermal noise level of the analog link of the frequency band 2 in the frequency range of the frequency band 2 before the combiner is-174 dBm/Hz + NF2+ G2-X2, when the thermal noise of the former is smaller than that of the latter by a certain amount of Y (positive value), the total noise after superposition can be equal to the thermal noise of the analog link of the frequency band 2 in the frequency range of the frequency band 2, namely the total noise after superposition is equal to the thermal noise of the analog link of the frequency band 2 in the frequency range of the frequency band 2
The inhibition degree is required to be A1-NF 1-NF2+ X2+ Y if-174 dBm/Hz + NF1+ G1-A1-174 dBm/Hz + NF2+ G2-X2-Y;
under the blocking level of the frequency band 1, the gain attenuation of the transmission branch is X1, the in-band non-blocking input level of the frequency band 2 is the sensitivity signal power, the link non-attenuation noise coefficient of the frequency band 2 is NF2, the gain is G2, the noise coefficient of the link after the gain attenuation of the frequency band 1 is X1 is NF1, and the gain is G1; defining the suppression degree of the frequency band 1 filter in the frequency range of the frequency band 2 as A1 (positive value), and the suppression degree of the frequency band 2 filter in the frequency range of the frequency band 1 as A2 (positive value); calculating the thermal noise level of the analog link of the frequency band 2 in the frequency range of-174 dBm/Hz + NF2+ G2-A2 before the combiner, and the thermal noise level of the analog link of the frequency band 1 in the frequency range of the frequency band 1 before the combiner is-174 dBm/Hz + NF1+ G1-X1, when the thermal noise of the former is smaller than that of the latter by a certain amount of Y (positive value), the total noise after superposition can be equal to the thermal noise of the analog link of the frequency band 2 in the frequency range of 2, namely the total noise is equal to the thermal noise of the analog link of the frequency band 2 in the frequency range of 2
And the inhibition degree A2 is NF2-NF1+ X1+ Y when the-174 dBm/Hz + NF2+ G2-A2 is-174 dBm/Hz + NF1+ G1-X1-Y.
S505: the combiner combines the signals of the two frequency bands and outputs the combined signals to the radio frequency sampler.
S506: the radio frequency sampler realizes large-bandwidth multi-band radio frequency sampling and directly converts a radio frequency signal into a baseband signal.
In this embodiment, the noise suppression filter is configured to suppress noise in the frequency range of the frequency band 2 to a certain level in the frequency band 1 receiving and transmitting branch, and suppress noise in the frequency range of the frequency band 1 to a certain level in the frequency band 2 receiving and transmitting branch; if a blocking signal exists in the frequency band 1, the gain attenuation is carried out on the gain of the receiver in the frequency band 1 to ensure that the power of the RFADC device does not overflow, and the gain of the receiver without the blocking in the frequency band 2 still keeps the maximum gain, so that the low noise levels output after the variable gain amplifier are different, the difference of the low noise levels of the two frequency bands is related to the gain difference of a link and NF, the noise levels are superposed after the combiner, if the difference of the noise powers of the two paths is large, the SNR of a low transmission branch of the noise level is influenced, and therefore, the noise suppression filter must be placed in front of the combiner.
In summary, the implementation of the present invention has at least the following advantages:
the multi-band simultaneous receiving can be realized, and because the transmission branches are mutually independent, when a blocking signal exists in one band, the receiving sensitivity performance of the other band can still be realized, the structure is simple, the power consumption and the occupied area of a PCB (printed circuit board) are lower, the miniaturization of a base station is facilitated, and the applicability of the multi-band receiving technology is improved.
The above embodiments are only examples of the present invention, and are not intended to limit the present invention in any way, and any simple modification, equivalent change, combination or modification made by the technical essence of the present invention to the above embodiments still fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. A signal receiving method, comprising:
receiving signals by a receiving antenna and inputting the signals to a frequency selection filter;
the frequency selective filter outputs signals of different frequency bands to corresponding transmission branches, and the number of the transmission branches is two;
the transmission branch utilizes an adjustable gain amplifier and a noise suppression filter which are connected in sequence to process signals and then outputs the signals to a combiner;
the combiner processes the input signals of all transmission branches and outputs the input signals to the radio frequency sampler;
the radio frequency sampler processes the combiner and then outputs the combiner to a signal processing device in the equipment;
the signal receiving method further includes:
controlling the attenuation of the adjustable gain amplifier in each transmission branch according to the output power of the radio frequency sampler and the output power of each transmission branch, comprising:
determining whether the power level of a detection point PD1 at the output end of the radio frequency sampler reaches an attenuation threshold, if so, respectively reading the power levels of a detection point PD2 and a detection point PD3 at the output end of the noise suppression filters on the two transmission branches;
determining whether the power level at the detection point PD2 is greater than the power level + Z at the detection point PD3, if so, attenuating the adjustable gain amplifier on the transmission branch where the detection point PD2 is located according to attenuation steps, and then switching to determining whether the power level at the detection point PD1 reaches an attenuation threshold;
if not, determining whether the power level at the detection point PD3 is greater than the level power + Z at the detection point PD2, if so, attenuating the adjustable gain amplifier on the transmission branch where the detection point PD3 is located according to attenuation steps, and then switching to determining whether the power level at the detection point PD1 reaches an attenuation threshold;
if not, respectively attenuating the adjustable gain amplifiers on the two transmission branches according to attenuation steps, and then determining whether the power level at the detection point PD1 reaches an attenuation threshold.
2. The signal receiving method according to claim 1, wherein the transmission branch further comprises a low noise amplifier, and an output signal of the frequency selective filter is processed by the low noise amplifier and then output to the adjustable gain amplifier.
3. The signal receiving method of claim 1, wherein the frequency selective filter comprises a receive duplexer frequency selective filter.
4. The signal receiving method of claim 1, further comprising: and calculating and controlling the suppression degree of the noise suppression filter in each transmission branch.
5. A signal receiving apparatus, comprising: the device comprises a receiving antenna, a frequency selection filter, two transmission branches, a combiner and a radio frequency sampler; the transmission branches comprise an adjustable gain amplifier and a noise suppression filter which are connected in sequence; the input end of the frequency selective filter is connected with the receiving antenna and comprises a plurality of output ends with different output frequency bands, and each output end is connected to the input end of a corresponding transmission branch; the output end of the transmission branch is connected to the input end of the combiner; the output end of the combiner is connected with the input end of the radio frequency sampler, and the output end of the radio frequency sampler is connected with a signal processing device in the equipment;
the control module is used for controlling the attenuation of the adjustable gain amplifier in each transmission branch according to the output power of the radio frequency sampler and the output power of each transmission branch, and comprises:
determining whether the power level of a detection point PD1 at the output end of the radio frequency sampler reaches an attenuation threshold, if so, respectively reading the power levels of a detection point PD2 and a detection point PD3 at the output end of the noise suppression filters on the two transmission branches;
determining whether the power level at the detection point PD2 is greater than the power level + Z at the detection point PD3, if so, attenuating the adjustable gain amplifier on the transmission branch where the detection point PD2 is located according to attenuation steps, and then switching to determining whether the power level at the detection point PD1 reaches an attenuation threshold;
if not, determining whether the power level at the detection point PD3 is greater than the level power + Z at the detection point PD2, if so, attenuating the adjustable gain amplifier on the transmission branch where the detection point PD3 is located according to attenuation steps, and then switching to determining whether the power level at the detection point PD1 reaches an attenuation threshold;
if not, respectively attenuating the adjustable gain amplifiers on the two transmission branches according to attenuation steps, and then determining whether the power level at the detection point PD1 reaches an attenuation threshold.
6. The signal receiving apparatus of claim 5, wherein the transmission branch further comprises a low noise amplifier, an input of the low noise amplifier is connected to the output of the frequency selective filter, and an output of the low noise amplifier is connected to the input of the adjustable gain amplifier.
7. The signal receiving apparatus of claim 5, wherein the frequency selective filter comprises a receive duplexer frequency selective filter.
8. The signal receiving apparatus of claim 5, further comprising a calculation module for calculating and controlling a degree of suppression of said noise suppression filter in each transmission branch.
9. A communication apparatus, comprising signal processing means, and signal receiving means according to any one of claims 5 to 8.
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| CN201510368400.2A CN106330220B (en) | 2015-06-29 | 2015-06-29 | Signal receiving method and device and communication equipment |
| JP2017564739A JP2018524884A (en) | 2015-06-29 | 2016-03-03 | Signal receiving method and apparatus, communication device, program, and recording medium |
| PCT/CN2016/075485 WO2017000579A1 (en) | 2015-06-29 | 2016-03-03 | Signal receiving method and apparatus, and communication device |
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| CN201510368400.2A CN106330220B (en) | 2015-06-29 | 2015-06-29 | Signal receiving method and device and communication equipment |
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| CN109150216B (en) * | 2017-06-13 | 2021-01-22 | 中兴通讯股份有限公司 | Dual-band receiver and automatic gain control method thereof |
| CN109756238A (en) * | 2017-11-08 | 2019-05-14 | 中兴通讯股份有限公司 | A kind of processing method and processing device of multi-band signal |
| CN108232392A (en) * | 2017-12-26 | 2018-06-29 | 广东盛路通信科技股份有限公司 | Combiner and the integrated radio-frequency devices of power splitter |
| CN108566216B (en) * | 2018-03-16 | 2023-06-23 | 成都锦江电子系统工程有限公司 | Radio frequency reconstruction type double-channel receiving assembly |
| CN112821902B (en) * | 2019-11-18 | 2022-08-30 | 海能达通信股份有限公司 | Receiver, control method of receiver and mobile terminal |
| CN112290973B (en) * | 2020-10-23 | 2024-07-09 | 湖南六九零六信息科技股份有限公司 | Combiner |
| CN113890642B (en) * | 2021-10-09 | 2023-12-05 | 中信科移动通信技术股份有限公司 | Method and device for checking communication system receiver |
| CN115276691A (en) * | 2021-10-14 | 2022-11-01 | 神基科技股份有限公司 | Wireless signal receiving device and system |
| CN115296733B (en) * | 2022-07-18 | 2024-02-06 | 三维通信股份有限公司 | Uplink combined signal overflow prevention method, device, DAS system and storage medium |
| CN115664441B (en) * | 2022-10-21 | 2023-05-16 | 电子科技大学 | High dynamic range receiver based on N-Path wave trap and receiving method |
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Also Published As
| Publication number | Publication date |
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| JP2018524884A (en) | 2018-08-30 |
| WO2017000579A1 (en) | 2017-01-05 |
| CN106330220A (en) | 2017-01-11 |
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