CN109286407B - Interference signal suppression device and method for suppressing strong interference signal - Google Patents
Interference signal suppression device and method for suppressing strong interference signal Download PDFInfo
- Publication number
- CN109286407B CN109286407B CN201811389262.6A CN201811389262A CN109286407B CN 109286407 B CN109286407 B CN 109286407B CN 201811389262 A CN201811389262 A CN 201811389262A CN 109286407 B CN109286407 B CN 109286407B
- Authority
- CN
- China
- Prior art keywords
- signal
- gain
- module
- conversion
- processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B2001/1045—Adjacent-channel interference
Abstract
The invention discloses an interference signal suppression device, which comprises a low-noise amplification module, a signal conversion module, a signal processing module and a power amplification module, wherein the low-noise amplification module is used for amplifying a low-noise signal; the input radio frequency signal is processed by the low noise amplification module, the signal processing module and the signal conversion module and then amplified and output by the power amplification module; the signal conversion module is used for performing gain control on the signal input by the low-noise amplification module, performing first conversion processing on the signal after gain control and outputting the signal to the signal processing module, and performing second conversion processing on the signal output by the signal processing module and outputting the signal to the power amplification module; the signal processing module is used for controlling the signal conversion module to carry out gain control and carrying out gain compensation processing on the signal after the first conversion processing. The invention also provides a method for inhibiting the strong interference signal. The device and the method can improve the communication quality of the network communication equipment, improve the reliability of the communication system and achieve the effect of expanding the application scene of the communication system.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to an interference signal suppression apparatus and a method for suppressing a strong interference signal.
Background
With the rapid development of communication technology, the spectrum resources of communication are increasingly tense, and because the spectrum is more and more intensive in use, the suppression of interference signals in a specific frequency band in the spectrum use process is usually filtered by using passive devices such as duplexers and dielectric filters. Generally, a passive device is easy to meet the design when having a requirement for out-of-band suppression of 5MHz, 10MHz, etc., but when the frequency band to be suppressed is very close to the useful frequency band, for example, out-of-band 2.5MHz, etc., strong interference to the useful communication frequency band may be caused, a network call drop may occur, or even a connection may not be possible, and communication quality may be seriously affected.
Disclosure of Invention
Aiming at the defects of strong interference and serious communication quality defect existing in the suppression of the adjacent frequency band, the inventor researches and discovers that the problem is caused because the transition band of the adopted passive filter device is relatively flat, so that when the passive filter device is used for suppressing the interference of the adjacent frequency band, a relatively serious signal leakage can be caused in the filtering process, and further, the power of an ADC sampling link is overlarge, a useful signal is compressed, and the strong interference on the useful communication frequency band is caused.
Based on this, the inventor thought that the problem might be solved if a way to balance the relatively flat nature of the transition band of the passive filter device itself could be sought during signal suppression. Based on the idea, the inventor finally seeks a solution through repeated experiments and attempts: the traditional thought of filtering in the analog signal stage is changed, and the filtering is also performed in the digital signal stage, so that the interference of adjacent frequency bands can be effectively filtered. However, the filtering that only changes the analog signal stage into the digital signal stage is also problematic, for example, when the signal is abnormal, the back-end signal may overflow. Thus, the inventors have finally determined, through numerous attempts, a combination of filtering in the analog signal stage and filtering in the digital stage, while adding gain control and compensation, to achieve effective suppression of strong interfering signals (i.e., interfering signals in very close frequency bands). The purpose of the scheme is as follows: on the basis of effectively filtering interference signals outside a communication band, gain compensation is carried out on useful in-band signals by detecting the attenuation of a front-end attenuator, effective recovery of the useful signals is achieved, and therefore the purposes of filtering strong interference signals and guaranteeing communication are achieved. Based on the thought, the invention provides an interference signal suppression device and a strong interference signal suppression method, so as to overcome the defects, meet the requirements of more users, improve the communication quality of each network communication device, improve the reliability of a communication system and realize the effect of expanding the working application context of the communication system.
In a first aspect, an embodiment of the present invention provides an interference signal suppression apparatus, including a low noise amplification module, a signal conversion module, a signal processing module, and a power amplifier module; the input radio frequency signal is processed by the low noise amplification module, the signal processing module and the signal conversion module and then amplified and output by the power amplification module; the signal conversion module is used for performing gain control on the signal input by the low-noise amplification module, performing first conversion processing on the signal after gain control and outputting the signal to the signal processing module, and performing second conversion processing on the signal output by the signal processing module and outputting the signal to the power amplification module; the signal processing module is used for controlling the signal conversion module to carry out gain control and carrying out gain compensation processing on the signal after the first conversion processing.
In the technical scheme of the embodiment of the invention, the low-noise amplification module can filter the input radio-frequency signal and has the function of amplifying the signal, so that the subsequent signal processing process is more accurate, and interference signals are eliminated; the attenuation unit can effectively adjust the gain of the input radio frequency signal; the signal processing module can effectively carry out gain control on the input signal and carry out corresponding compensation processing; the power amplifier module can amplify the processed signals and filter the output signals, so that the output signals can meet the expected power level and are limited in an expected communication frequency band, and interference on other frequency bands is avoided. Therefore, by arranging the signal processing module in the suppression device, the gain control of the radio frequency signal based on power detection is completed, and the gain compensation is performed on the converted signal according to the gain control condition, namely, the technical scheme of the embodiment of the invention also performs real-time compensation on the link gain according to the real-time comparison of the input radio frequency signal and the processed compensation signal in the signal conversion processing process, so that the strong interference signal outside the communication band is effectively filtered, and the useful signal is effectively recovered, thereby achieving the effect of ensuring the communication.
In a second aspect, the present invention further provides a method for suppressing a strong interference signal, including:
filtering and low-noise amplification processing are carried out on the received radio frequency signal, and a second signal which is in line with expectation is obtained;
performing gain control on the second signal to obtain a third signal;
performing first conversion processing on the third signal to obtain a fourth signal;
performing gain compensation processing on the fourth signal to obtain a fifth signal;
performing second conversion processing on the fifth signal to obtain a radio frequency analog signal;
and filtering and amplifying the radio frequency analog signal and outputting the radio frequency analog signal.
The method carries out gain control on the radio frequency signals after filtering and low-noise amplification processing, carries out filtering on digital signals after analog-digital conversion and carries out gain compensation based on the gain control, realizes filtering of analog signals by using passive devices, secondary filtering of the digital signals, and simultaneously carries out gain compensation based on the gain control, realizes gain recovery on received effective signals, overcomes the defect caused by attenuation of the effective signals due to strong interference of a useful communication frequency band, and improves the communication quality.
Drawings
Fig. 1 is a schematic block diagram of an interference signal suppressing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of an interference signal suppressing apparatus according to another embodiment of the present invention;
fig. 3 is a flowchart of a method for suppressing a strong interference signal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Moreover, it is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Fig. 1 schematically shows a schematic block diagram of an interference signal suppression device according to an embodiment of the present invention, and as shown in fig. 1, the interference signal suppression device 1 includes a low noise amplification module 2, a signal conversion module 3, a signal processing module 4, and a power amplification module 5, where the low noise amplification module 2 is connected to the signal conversion module 3, and the signal conversion module 3 is connected to the signal processing module 4 and the power amplification module 5, respectively. The low-noise amplification module 2 is configured to receive a radio frequency signal input to the device, perform filtering and signal amplification processing on the input radio frequency signal, and input the processed pure radio frequency signal to the signal conversion module 3. The signal conversion module 3 is mainly used for performing conversion on an input radio frequency signal, and includes analog-to-digital conversion (i.e., a first conversion process) and digital-to-analog conversion (i.e., a second conversion process). The signal processing module 4 is used for processing the digital signal, including gain control processing and gain compensation processing, and mainly performs the gain control processing and the gain compensation processing after the signal conversion module 3 performs the first conversion processing, so as to achieve the purpose of suppressing the interference signal on the digital signal level, and overcome the defect that the traditional passive filter device cannot effectively filter the strong interference signal of the adjacent frequency band. The power amplifier module 5 is used for amplifying the radio frequency signals output after being processed by the signal conversion module 3 and the signal processing module 4 and filtering the output signals, so as to ensure that the signals finally output by the device meet the expected power level and are limited in the expected communication frequency band, thereby effectively avoiding the interference to the signals of other frequency bands.
As shown in fig. 1, as an exemplary implementation, the signal conversion module 3 is implemented to include an attenuation unit 301 for adjusting an input gain, which is connected to the signal processing module 4, and controls a link gain according to an attenuation amount determined by the signal processing module 4 to avoid overflow of a signal at an ADC interface. The signal processing module 4 controls the attenuation unit 301 to perform gain control on the signal input to the signal conversion module 3 according to the power of the digital signal after the first conversion processing performed by the signal conversion module 3. After the signal conversion module 3 performs gain control processing on the radio frequency signal input by the low noise amplification module through the attenuation unit 301, the signal after gain control is subjected to first conversion processing, and is converted into a digital domain intermediate frequency signal, that is, down-conversion change from the radio frequency signal to the intermediate frequency signal is performed, and then the signal conversion module 3 outputs the intermediate frequency signal after the first conversion processing to the signal processing module 4 for gain compensation processing. After the signal processing module 4 performs gain compensation processing on the intermediate frequency signal, the processed intermediate frequency signal is returned to the signal conversion module 3, at this time, the signal conversion module 3 performs second conversion processing on the signal, and converts the intermediate frequency signal into a radio frequency analog signal, namely, up-conversion change from the intermediate frequency signal to the radio frequency analog signal is realized. Then, the signal conversion module 3 outputs the radio frequency analog signal to the power amplifier module 5, the amplification of the radio frequency signal to an expected power level and the filtering of the output signal are completed through the power amplifier module 5, the output signal of the device is ensured to meet the expected power level and is limited in an expected communication frequency band, and the interference to other frequency bands is avoided.
As shown in fig. 1, as an exemplary implementation example, the signal conversion module 3 further includes a data conversion unit 302 and a filtering unit 303, where the data conversion unit 302 is respectively connected to the attenuation unit 301, the signal processing module 4, and the power amplification module 5, and receives the radio frequency signal after the gain control processing input by the attenuation unit 301, and outputs the processed radio frequency analog signal to the power amplification module 5 after processing. The data conversion unit 302 is configured to perform analog-to-digital conversion (i.e., first conversion processing) on the signal output by the attenuation unit 301, output an intermediate frequency signal to the ADC interface unit 401 of the signal processing module 4, perform digital-to-analog conversion (i.e., second conversion processing) on the signal output by the DAC interface unit 404 of the signal processing module 4, and output a radio frequency analog signal to the filtering unit 303. The data conversion unit 302 may specifically be implemented to include an ADC conversion component for performing the first conversion processing and a DAC conversion component for performing the second conversion processing, where the ADC conversion component is connected to the attenuation unit 301 and the ADC interface unit 401, the DAC conversion component is connected to the DAC interface unit 404 and the filtering unit 303, and the filtering unit 303 is connected to the power amplifier module 5. The filtering unit 303 is configured to output the radio frequency analog signal to the power amplifier module 5 after filtering the radio frequency analog signal, and the filtering unit 303 is configured to prevent spectrum diffusion generated after the DAC interface unit 404 is abnormal, and meanwhile, perform a certain protection effect on the subsequent power amplifier module 5.
Illustratively, the ADC converting part for performing the first conversion process may be implemented as a radio frequency sampling chip, and the DAC converting part for performing the second conversion process may be implemented as a radio frequency converting chip, such as an AD9361, although other types of radio frequency sampling/converting chips may also be used.
In addition, the filtering unit 303 performs filtering processing on the radio frequency analog signal after the second conversion processing, so as to limit the radio frequency analog signal output after the conversion within a predetermined frequency band, thereby avoiding the occurrence of spectrum diffusion due to data abnormality in the up-conversion process, which causes the occurrence of abnormality in the back-end link. Exemplarily, the filtering unit may be implemented as a SAW (surface acoustic wave filter).
As shown in fig. 1, the signal processing module 4 is exemplarily implemented to include an ADC interface unit 401, an interference suppression unit 402, a link control unit 403, and a DAC interface unit 404.
The ADC interface unit 401 is configured to receive the intermediate frequency signal of the ADC conversion component, convert the intermediate frequency signal to obtain an available internal effective digital signal, control the attenuation unit 301 to perform gain control on the radio frequency signal input to the attenuation unit 301 through the low noise amplification module 2 according to the power of the effective digital signal, and determine a gain attenuation amount to output to the link control unit 403. The internally available valid digital signal is a digital signal obtained by conversion according to a predetermined protocol, such as JESD204B, and the digital signal can be effectively identified in the device link. In a specific implementation, the ADC interface unit 401 may be connected to the ADC conversion components of the attenuation unit 301 and the data conversion unit 302, respectively, and acquire a signal from the ADC conversion component of the data conversion unit 302, convert the input signal into valid digital signal data available inside according to the JESD204B protocol, and perform real-time peak power detection on the signal, specifically, by comparing the power of the valid digital signal with a preset threshold value when the device is rated for power, when the power of the digital signal is greater than the threshold value, the front-end digital attenuation unit 301 is controlled to attenuate the signal, and the attenuation unit 301 controls the signal to be attenuated to the threshold value or below, and transmits the attenuation amount (i.e., gain attenuation amount) at this time to the link control module 403, so as to be used for gain recovery.
The interference suppression unit 402 is configured to perform interference filtering processing on the effective digital signal converted by the ADC interface unit 401 and determine whether to perform gain adjustment on the signal after interference filtering. Illustratively, the interference suppression unit 402 may be implemented as a shaping filter component 4021 and a power calculation component 4022, where the shaping filter component 4021 is configured to perform shaping filtering processing on the digital signal after the conversion processing by the ADC interface unit 401; the power calculating element 4022 is configured to generate a gain indication signal according to a power change of the signal before and after the shaping filtering, and output the gain indication signal to the link control unit. The integer filter element 4021 is implemented as a digital filter with a good transition band performance, which can filter an interference signal at the edge of a pass band, and the implementation manner of the filter may be wideband integer filter or carrier type filter, but the filter has consistent properties and functions, and all the filters are used for filtering interference and recovering useful signals, so the filters with the same function of filtering digital signals are considered to be within the scope of the present invention, and the present embodiment is not exhaustive. The digital signal input by the ADC interface unit 401 is shaped and filtered by the shaping filter element 4021, so that the digital signal after conversion is filtered by a digital filter with a good transition band, and the defect that the existing passive device cannot effectively filter a strong interference signal can be overcome. Power computing element 4022 byAn exemplary implementation of generating the gain indication signal by performing power detection on the signal before and after the shaping by the shaping filter element 4021 may be: the digital signal power before and after shaping filtering is calculated, comparison and judgment are performed according to the calculation result, if the digital signal has no difference in power before and after passing through the shaping filtering element 4021, the gain compensation output judgment result is not started to be "0", if the power before shaping is greater than the power after shaping and the signal power detection value after shaping is greater than the power threshold of no signal, the judgment result is output to be "1", and the gain indication signal, that is, the judgment result is output to the link control unit 403. Wherein, calculating the digital signal power before and after the shaping filtering can be realized by counting the average power of the digital signal in a period of time, and the calculation methods are numerous, such as by function
Calculating, which is not specifically limited in the embodiment of the present invention; the judgment process is to compare the calculated power before and after filtering.
The link control unit 403 is configured to perform gain compensation on the signal after the shaping filtering processing according to the gain indication signal and the gain attenuation amount. The specific implementation of the gain compensation process may be, for example: if it is determined by the judgment of the power calculating element 4022 that gain compensation is required, that is, the power before and after the shaping filtering is changed, a gain attenuation is obtained to perform compensation adjustment, for example, if the front-end ATT is attenuated by 5dB, the adjustment amount is increased by 5dB, and the increase adjustment may be implemented by multiplying the signal by a corresponding gain value (gain restoration value, e.g., gain attenuation amount in the embodiment of the present invention).
The DAC interface unit 404 is configured to perform conversion processing on the gain-compensated signal, and output the signal to a DAC conversion component of the signal conversion module 3 according to the JESD204B protocol, where the DAC conversion component converts the signal output by the DAC interface unit 404 into a radio frequency analog signal, and may be implemented by using a radio frequency conversion chip, in this embodiment, the AD9361 is used.
The working process of the interference signal suppression device 1 is as follows: the input radio frequency signal can be obtained by directly coupling the base station radio frequency signal through a coupler connected with the interfering signal suppression device 1 or receiving the spatial radio frequency signal through an antenna, in this embodiment, a spatial receiving mode is adopted, the frequency band acts as 2620 MHz-2690 MHz, and the uplink is 2500 MHz-2570 MHz, it should be understood by those skilled in the art that the frequency band selection can be set according to the practical application, and can be any communication frequency band within 300 MHz-4 GHz, in the later technical development, the selection is not limited to 4GHz, and only a filter corresponding to the rear end needs to be set and updated according to the requirement, and the interfering signal suppression device 1 amplifies and outputs the radio frequency signal through the low noise amplification module 2, the signal processing module 3 and the signal conversion module 4. The low noise amplification module 2 is implemented as a filter, and filters an incoming radio frequency signal to filter out an out-of-band interference signal, so as to ensure the relative purity of an access signal of the device, the filter may be a duplexer, or a sound meter or a dielectric filter, and the radio frequency signal is amplified to the expected power of the device after entering the low noise amplification module 2, for example, the maximum power reaches 0 dBm. Then, the low noise amplification module 2 outputs the processed rf signal to the attenuation unit 301, the signal is output to a data conversion unit 302 after gain control is carried out by an attenuation unit 301, a DAC conversion part (namely, a part responsible for first conversion processing) of the data conversion unit carries out radio frequency sampling on the signal, the radio frequency signal is directly converted into a digital domain intermediate frequency signal and output to an ADC interface unit, the ADC interface unit converts the data into effective digital signal data according to a JESD204B protocol, real-time peak power detection is carried out, comparison with a preset threshold is carried out, does not operate when the power is less than the threshold value, sets the difference value as the gain attenuation amount when it is greater than the threshold value, and outputs the gain attenuation amount to the link control unit 403, meanwhile, the ADC interface unit also controls the attenuation unit to attenuate the signal input via the low noise amplification module 2, where the attenuation is the gain attenuation output to the link control unit 403. Then, the ADC interface unit outputs the effective digital signal to the shaping filter unit, the shaping filter unit filters out-of-band signals, meanwhile, the power calculation unit detects the power of the data before and after shaping, and sends the power comparison result (namely the gain indication signal) to the link control unit, when the power before shaping is greater than the power after shaping and the power detection value of the signal after shaping is greater than the power threshold without the signal, the judgment result (namely the gain indication signal) is output as '1', otherwise, the judgment result is output as '0'. The shaped signal enters the link control unit, the link control unit firstly judges the gain indication signal, when the judgment result of the power calculation unit is '1', the link control unit starts the gain compensation function of the link control unit, compensates the attenuation amount of the front end attenuation unit into the link, and recovers the gain of the signal after the interference suppression, namely recovers the link gain of the main signal, and if the judgment result is '0', the gain is not adjusted. The processed signal enters a DAC interface unit, data is transmitted to an ADC conversion part of the data conversion unit according to a JESD204B protocol, and the signal is converted into a radio frequency analog signal through digital-to-analog conversion (exemplarily realized by a DAC radio frequency conversion chip). The converted radio frequency signal enters a filtering unit and is used for limiting the signal to a system expected band, so that the frequency spectrum diffusion generated after the DAC interface unit is abnormal is avoided, and a certain protection effect can be performed on the power amplifier circuit. The converted radio frequency analog signal enters a power amplification module for amplification, the signal is amplified to a power level expected by a system, such as 43dBm, and then output.
In the preferred embodiment, the power amplifier module 5 can be further connected with a duplex filter, the filter processes the signal sent to the power amplifier module 5 through the filtering unit 303, and the filtering of the filter can ensure that the nonlinear signal introduced by the power amplifier module 5 does not affect other frequency bands, so as to ensure the working stability and reliability of the whole device.
Illustratively, the attenuation unit 301 may be implemented as a digital attenuator, and the power amplifier module may be implemented as a power amplifier circuit.
Generally, a conventional passive device cannot effectively suppress or suppress an adjacent near frequency band interference signal because a transition band is gentle, but after link analog-to-digital conversion, an effective signal is compressed and distorted and cannot be effectively amplified. The invention effectively restrains the out-of-band interference of the signal through digital signal processing, and carries out gain compensation on the useful in-band signal through detecting the attenuation of the front-end attenuator, thereby making up the defects. The invention also overcomes the defect that the system can not work when the network equipment has large signal interference at the edge of the communication frequency band, and the device architecture of the embodiment can show that the invention has simple and effective implementation, can effectively inhibit interference signals, expands the working application context of the device, and can be used in occasions related to communication and needing to ensure good communication quality.
Fig. 2 schematically shows an interfering signal suppressing apparatus according to still another embodiment of the present invention, as shown in fig. 2,
the interference signal suppression device 1 further includes a monitoring module 6 configured to perform parameter configuration on the device 1, the signal processing module 4 is connected to the monitoring module 6 and configured to acquire parameter information, where the configured parameter information includes a rated power threshold, an average power and a peak power control threshold, the configured parameter information may be manually set according to user requirements and system standards in the communication field, and the monitoring module 6 is not limited to this, and may also customize a monitoring function according to user requirements, such as real-time monitoring, and in this case, as shown in fig. 2, the monitoring module 6 may be connected to all other modules of the device respectively to acquire a working state of each module of the device in real time and perform data interaction such as parameter acquisition.
Illustratively, the monitoring module 6 performs parameter configuration on the apparatus 1, and may be implemented to receive parameter configuration information set by a user, store the parameter configuration information, or read the stored parameter configuration information and output the parameter configuration information to the signal processing module 4. Illustratively, the configured parameter may be a power threshold of the apparatus, or the like.
In this embodiment, the monitoring module 6 further outputs the average power and the peak power control threshold to the link control unit, so that the link control unit can also control the average power and the peak power of the link after performing gain compensation on the signal, and the obtained link average power and the peak power perform power control processing on the signal after the gain compensation, thereby ensuring that the signal output by the system is not abnormal, and protecting the rear-end power amplifier module.
Fig. 3 schematically shows a flowchart of a method for suppressing a strong interference signal according to an embodiment of the present invention, and as shown in fig. 3, the method includes the following steps:
step S301: and filtering and low-noise amplification processing are carried out on the received radio frequency signal to obtain a second signal which is in accordance with the expectation. The concrete implementation is as follows: the radio frequency signals are filtered to filter out-of-band interference signals, the relative purity of signals accessed by the device is ensured, and the filtered signals are subjected to low-noise amplification processing.
Step S302: and performing gain control on the second signal to obtain a third signal. Specifically, after the second signal is obtained, gain control is performed on the second signal, a gain attenuation of the second signal is obtained, and signal attenuation processing is performed according to the gain attenuation. Since the gain attenuation is input from the signal processing module, the initial attenuation is zero, and the specific acquisition mode and the attenuation mode of the processed signal can be referred to the above-mentioned device implementation part.
Step S303: and performing analog-to-digital conversion on the third signal to obtain a fourth signal. The specific implementation manner may be to perform radio frequency sampling on the third signal, directly convert the radio frequency signal into a digital domain intermediate frequency signal, and refer to an analog-to-digital conversion method in the prior art.
Step S304: and performing gain compensation processing on the fourth signal to obtain a fifth signal. The concrete implementation is as follows: performing data conversion on the fourth signal, converting the fourth signal into an available effective digital signal inside according to a corresponding protocol, performing power detection according to the converted digital signal, determining a gain attenuation amount, and performing shaping filtering processing (which can be realized by a digital filter) on the converted digital signal; meanwhile, a gain indication signal is generated according to the power change of the signals before and after the shaping filtering processing; and then, carrying out gain compensation processing on the shape-filtered signal according to the gain indication signal and the gain attenuation amount to generate a fifth signal. The detailed implementation of this section can be referred to the corresponding description of the apparatus section above.
Step S305: and D/A conversion is carried out on the fifth signal to obtain a radio frequency analog signal. The specific implementation manner may refer to a digital-to-analog conversion method in the prior art, for example, a radio frequency conversion chip is adopted.
Step S306: and filtering and amplifying the radio frequency analog signal and outputting the radio frequency analog signal. The processed signals are processed by a filter and an amplifier (specifically, the signals can be processed by a SAW filter and a power amplifier circuit), so that the obtained signals can be amplified to an expected power level and filtered, the output signals of the device can meet the expected power level and are limited in an expected communication frequency band, and interference on other frequency bands is avoided.
In a preferred embodiment, the processing in step S304 is further implemented as: after the gain compensation processing, the average value and the peak value of the signal after the gain compensation processing are controlled according to the set average value power threshold and the set peak value power threshold, and a fifth signal is generated.
In the apparatus and method steps of this embodiment, only the downlink for signal processing is shown, and for the wireless system, the steps required for uplink and downlink are the same, and may be implemented by reference, so that the detailed description is omitted here.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (8)
1. The interference signal suppression device is characterized by comprising a low-noise amplification module, a signal conversion module, a signal processing module and a power amplification module;
the input radio frequency signal is processed by the low noise amplification module, the signal processing module and the signal conversion module and then amplified and output by the power amplification module; wherein the content of the first and second substances,
the signal conversion module is used for performing gain control on the signal input by the low-noise amplification module, performing first conversion processing on the signal after gain control and outputting the signal to the signal processing module, and performing second conversion processing on the signal output by the signal processing module and outputting the signal to the power amplification module;
the signal processing module is used for controlling the signal conversion module to carry out gain control and carrying out gain compensation processing on the signal after the first conversion processing; wherein the content of the first and second substances,
the signal conversion module comprises an attenuation unit used for carrying out gain control on the signal input by the low-noise amplification module;
the signal processing module comprises
The ADC interface unit is used for receiving the data after the first conversion processing and generating an available internal effective digital signal; according to the effective digital signal power, the control attenuation unit performs gain control on the signal input by the low-noise amplification module and outputs gain attenuation to the link control unit;
the interference suppression unit is used for carrying out interference filtering on the effective digital signals output by the ADC interface unit and generating gain indication signals according to filtering conditions and outputting the gain indication signals to the link control unit;
the link control unit is used for carrying out gain compensation on the signal output by the interference suppression unit according to the gain indication signal and the gain attenuation amount;
and the DAC interface unit is used for converting the signal output by the link control unit and outputting the converted signal to the signal conversion module for second conversion processing.
2. The apparatus of claim 1, wherein the interference suppression unit comprises
The shaping filter element is used for shaping and filtering the effective digital signal processed by the ADC interface unit; and
and the power calculation element is used for generating a gain indication signal according to the power change of the signals before and after the shaping filtering and outputting the gain indication signal to the link control unit.
3. The apparatus according to claim 2, wherein the link control unit is further configured to perform power control processing on the gain-compensated signal according to the obtained link mean power threshold and peak power threshold.
4. The apparatus of claim 3, further comprising a monitoring module for configuring parameters of the apparatus,
the signal processing module is connected with the monitoring module and is used for acquiring configured parameter information, wherein the configured parameter information comprises a rated power threshold, a mean power threshold and a peak power threshold.
5. The apparatus of any one of claims 1 to 4, wherein the signal conversion module further comprises a data conversion unit and a filtering unit,
the data conversion unit includes an ADC conversion section and a DAC conversion section,
the ADC conversion part is used for performing first conversion processing on the signal output by the attenuation unit and outputting an intermediate frequency signal to the ADC interface unit;
the DAC conversion part is used for carrying out second conversion processing on the signals output by the DAC interface unit and outputting radio frequency analog signals to the filtering unit;
and the filtering unit is used for outputting the signal to the power amplification module after filtering the radio frequency analog signal.
6. A method for suppressing a strong interfering signal, comprising:
filtering and low-noise amplification processing are carried out on the received radio frequency signal, and a second signal which is in line with expectation is obtained;
performing gain control on the second signal to obtain a third signal;
performing first conversion processing on the third signal to obtain a fourth signal;
performing gain compensation processing on the fourth signal to obtain a fifth signal;
performing second conversion processing on the fifth signal to obtain a radio frequency analog signal;
filtering and amplifying the radio frequency analog signal and then outputting the radio frequency analog signal; wherein the content of the first and second substances,
the gain compensation processing is carried out on the fourth signal to obtain a fifth signal comprising
Converting the fourth signal into an available effective digital signal, and determining a gain attenuation amount according to the effective digital signal power;
shaping and filtering the effective digital signal, and generating a gain indication signal according to the power change of the signal before and after shaping and filtering;
and carrying out gain compensation processing on the signal subjected to shaping filtering according to the gain indication signal and the gain attenuation amount to generate a fifth signal.
7. The method of claim 6, wherein gain controlling the second signal to obtain a third signal comprises:
and acquiring the gain attenuation amount, and performing signal attenuation processing according to the gain attenuation amount.
8. The method of claim 6 or 7, wherein after performing the gain compensation process on the shape-filtered signal according to the gain indication signal and the gain attenuation amount, the gain-compensated signal is further subjected to mean and peak control according to a mean power threshold and a peak power threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389262.6A CN109286407B (en) | 2018-11-21 | 2018-11-21 | Interference signal suppression device and method for suppressing strong interference signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389262.6A CN109286407B (en) | 2018-11-21 | 2018-11-21 | Interference signal suppression device and method for suppressing strong interference signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109286407A CN109286407A (en) | 2019-01-29 |
| CN109286407B true CN109286407B (en) | 2020-08-04 |
Family
ID=65176279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811389262.6A Active CN109286407B (en) | 2018-11-21 | 2018-11-21 | Interference signal suppression device and method for suppressing strong interference signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109286407B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511178B (en) * | 2020-10-19 | 2022-04-05 | 河南智微电子有限公司 | Communication receiving module |
| CN112272351B (en) * | 2020-10-22 | 2022-07-08 | 浙江天则通信技术有限公司 | Anti-passive positioning device and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656562B (en) * | 2009-09-22 | 2012-07-18 | 武汉虹信通信技术有限责任公司 | Device and method for realizing elimination of self-excitation interference of repeater |
| US8862064B2 (en) * | 2010-09-24 | 2014-10-14 | Broadcom Corporation | Self-testing transceiver architecture and related method |
-
2018
- 2018-11-21 CN CN201811389262.6A patent/CN109286407B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109286407A (en) | 2019-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2731265B1 (en) | Reception device, and gain control method | |
| JP5840626B2 (en) | Process for achieving spur mitigation in integrated circuits including wideband receivers | |
| JP3989572B2 (en) | Apparatus and method for optimizing received signal quality in a radio receiver | |
| CN103036827B (en) | Full division duplex system and leakage cancellation method | |
| US20110065408A1 (en) | Mismatched delay based interference cancellation device and method | |
| KR20110104489A (en) | Method and system of calibration of a second order intermodulation intercept point of a radio transceiver | |
| US6714775B1 (en) | Interference canceller | |
| US7639998B1 (en) | RF receiver utilizing dynamic power management | |
| US20110028115A1 (en) | Receiver apparatus having filters implemented using frequency translation techniques | |
| JP2001230686A (en) | Method and device for protecting interference-received signal overload | |
| CN107257245B (en) | Anti-interference transmitting and receiving unit, transmitting and receiving device and anti-interference attenuation processing method | |
| US6959170B2 (en) | Communications receivers and methods therefor | |
| JP2007221758A (en) | Telephone signal elimination circuit, digital broadcast receiving circuit, and portable digital broadcast receiver | |
| CN109286407B (en) | Interference signal suppression device and method for suppressing strong interference signal | |
| CN104821861A (en) | Signal processing method and device | |
| JP3878811B2 (en) | Frequency multiplexing transceiver and crosstalk cancellation method | |
| JP2004328639A (en) | Signal strength measuring device and receiver using it | |
| CN106788813B (en) | Interference signal detection and elimination device and method and mobile terminal | |
| CN109067413B (en) | Ultrashort wave channel receiver with high dynamic range | |
| US20060251186A1 (en) | Wireless communication receiver having an adc with a limited dynamic range | |
| CN109150211B (en) | Broadband transmitting device | |
| US7103323B2 (en) | Apparatus for transmitting RF signal in mobile communication terminal and method for controlling the same | |
| WO2024082887A1 (en) | Signal transceiving device, self-interference cancellation method, and computer readable storage medium | |
| Williamson et al. | Performance Analysis of Adaptive Wideband Duplexer | |
| CN108667503B (en) | Method, device and equipment for improving equipment blocking index |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |