WO2017036161A1 - Self-adaptive filtering method and apparatus - Google Patents

Self-adaptive filtering method and apparatus Download PDF

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Publication number
WO2017036161A1
WO2017036161A1 PCT/CN2016/081167 CN2016081167W WO2017036161A1 WO 2017036161 A1 WO2017036161 A1 WO 2017036161A1 CN 2016081167 W CN2016081167 W CN 2016081167W WO 2017036161 A1 WO2017036161 A1 WO 2017036161A1
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interference ratio
filtering
channel
adjacent
interference
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PCT/CN2016/081167
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French (fr)
Chinese (zh)
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刘兵
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中兴通讯股份有限公司
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    • 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
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

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  • This document relates to, but is not limited to, the field of wireless communications, and relates to an adaptive filtering method and apparatus.
  • wireless interference is diverse.
  • a useful device transmits a useful signal, due to the limitation of the device itself and the out-of-band rejection of the filter, unwanted signals such as spurious, harmonic, and intermodulation are generated outside the operating band, and these signals fall to other wireless systems.
  • unwanted signals such as spurious, harmonic, and intermodulation are generated outside the operating band, and these signals fall to other wireless systems.
  • the working frequency band it will form interference, usually including adjacent channel interference and co-channel interference.
  • Narrowband communication systems such as GSM (Global System for Mobile Communication) do not configure adjacent carriers in the same cell. When a cell is configured with adjacent carriers, frequency hopping is used to resolve mutual interference of adjacent frequencies. ).
  • Broadband communication system such as E-UTRAN (Evolved Universal Terrestrial Radio Access Network) 20M carrier bandwidth, useful carrier only accounts for 18MHz bandwidth, and each side has a 1MHz bandwidth for carrier Inter-isolation protection reduces inter-carrier interference.
  • the guard interval of the carrier should also be considered between different wireless standards. Due to limited spectrum resources, in order to improve spectrum utilization, the guard interval between carriers is often reduced, resulting in adjacent channel interference. For example, between adjacent cells, there may be interference of adjacent frequencies. The frequency band spacing between different modes is reduced. Especially for the base station receiver, since the signal level range of the user equipment (UE, User Equipment) to the base station receiver is large, the adjacent frequency interference may be severe, which may seriously affect the reception performance.
  • UE User Equipment
  • the channel filter adopts a relatively fixed filtering mode to filter the carrier data to filter out-band interference.
  • the filter mode adopted by the channel filter is fixed, and its passband performance and out-of-band rejection performance are fixed.
  • the performance of the channel filter is a compromise result, which inevitably leads to the inability to achieve optimal filtering performance in all interference scenarios. .
  • the channel filter of the fixed filtering mode will lose more useful carrier signals and cannot obtain the best reception performance.
  • the filter of the fixed filtering mode does not suppress the adjacent channel interference, and can not obtain higher reception. performance.
  • the embodiment of the invention provides an adaptive filtering method and device, which solves the problem that the channel filter has poor filtering performance caused by adopting a fixed filtering mode for different interference scenarios.
  • An embodiment of the present invention discloses an adaptive filtering method, where the adaptive filtering method includes:
  • the wideband digital signal is channel filtered using the channel filtering mode.
  • acquiring an interference ratio of the wideband digital signal to be subjected to filtering processing includes:
  • the interference ratio includes an adjacent frequency interference ratio.
  • the channel filtering mode that matches the filtering performance according to the interference ratio setting and the interference ratio includes:
  • the preset neighboring interference ratio threshold includes a first preset adjacent interference ratio threshold and a second preset adjacent interference ratio threshold;
  • the channel filtering mode that determines that the filtering performance matches the adjacent frequency interference ratio according to the comparison result includes:
  • the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold and less than or equal to the second preset adjacent-channel interference ratio threshold, setting the filtering performance to be out-of-band in the performance of the medium passband Channel filtering mode that suppresses performance;
  • the channel filtering mode with the filtering performance being the high pass band performance is set.
  • An embodiment of the present invention further provides an adaptive filtering apparatus, where the adaptive filtering apparatus includes: an interference ratio acquiring unit, a filtering mode setting unit, and a channel filtering unit;
  • the interference ratio acquisition unit is configured to acquire an interference ratio of the wideband digital signal to be subjected to filtering processing
  • the filtering mode setting unit is configured to set a channel filtering mode in which a filtering performance matches the interference ratio according to the interference ratio;
  • the channel filtering unit is configured to perform channel filtering on the wideband digital signal by using the channel filtering mode.
  • the interference ratio obtaining unit includes: a signal processing module and an interference ratio calculating module;
  • the signal processing module is configured to intercept at least one segment as a sample wideband digital signal from the wideband digital signal to be subjected to filtering processing;
  • the interference ratio calculation module is configured to extract an in-band signal and an interference signal of the sample wideband digital signal, calculate a power of the in-band signal and a power of the interference signal, and compare the power of the in-band signal with the The ratio of the power of the interference signal is taken as the interference ratio.
  • the interference ratio calculation module includes an adjacent frequency interference ratio calculation submodule, where the interference ratio includes an adjacent frequency interference ratio, and the adjacent frequency interference ratio calculation submodule is configured to extract the inband of the sample wideband digital signal.
  • the signal and the adjacent-frequency interference signal calculate the power of the in-band signal and the power of the adjacent-frequency interference signal, and the ratio of the power of the in-band signal to the power of the adjacent-frequency interference signal is used as an adjacent-channel interference ratio.
  • the filtering mode setting unit includes an adjacent frequency interference filtering setting module, and the adjacent frequency interference filtering setting module is configured to compare the adjacent frequency interference ratio with a preset adjacent frequency interference ratio threshold. Comparing, the adjacent channel interference channel filtering mode in which the filtering performance matches the adjacent frequency interference ratio is determined according to the comparison result.
  • the preset neighboring interference ratio threshold includes a first preset adjacent interference ratio threshold and a second preset adjacent interference ratio threshold; and the adjacent interference filtering setting module is determined according to the comparison result by: Channel filtering mode with filtering performance matching the adjacent frequency interference ratio:
  • the channel filtering mode with the filtering performance being high out-of-band rejection performance is set;
  • the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold, and is less than or equal to the second preset adjacent-channel interference ratio threshold, setting a filtering performance to a medium passband performance Channel filtering mode with out-of-band rejection performance;
  • the channel filtering mode with the filtering performance being the high pass band performance is set.
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and the computer executable instructions are implemented to implement an adaptive filtering method.
  • An embodiment of the present invention provides an adaptive filtering method and apparatus, which acquires an interference ratio of the wideband digital signal, that is, an interference condition of the wideband digital signal, before the obtained wideband digital signal is filtered;
  • the interference of the digital signal is set to a channel filtering mode in which the filtering performance matches the interference ratio; the wideband digital signal is filtered based on a channel filtering mode set in real time. It can be seen that, before filtering the obtained wideband digital signal, the embodiment of the present invention matches a filtering mode with the most suitable filtering performance in real time according to the current interference ratio of the current wideband digital signal, that is, according to the current filtering process.
  • the signal interference condition is adaptively matched to the optimal filtering mode. It is not uniformly filtered by the fixed filtering mode with performance compromise, and better filtering performance can be obtained.
  • FIG. 1 is a schematic flowchart of an adaptive filtering method according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic flowchart of acquiring an interference ratio according to Embodiment 1 of the present invention
  • Embodiment 3 is a system block diagram of a wideband receiver in Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of an adaptive filtering apparatus according to Embodiment 2 of the present invention.
  • FIG. 5 is another schematic structural diagram of an adaptive filtering apparatus according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of an adaptive filtering apparatus according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the adaptive filtering method provided by this embodiment is applicable to various application scenarios, and is particularly suitable for processing a received wireless signal by a wideband receiver.
  • the application of the wideband receiver will be described below as an example.
  • the basic process of receiving a processed signal by a wideband receiver is: receiving a radio frequency signal, performing analog-to-digital conversion on the wideband digital signal, performing channel filtering on the obtained wideband digital signal, and obtaining a digital baseband signal, and then receiving the digital baseband information. Demodulation and decoding processing.
  • a filtering method capable of improving filtering performance is proposed for the channel filtering processing link in the above processing flow. The following examples are as follows:
  • the present embodiment does not immediately perform channel filtering processing, but first acquires the interference condition of the wideband digital signal.
  • the interference ratio of the wideband digital signal can be characterized by the interference ratio, and then According to the obtained interference condition, the filtering mode with the most matching filtering performance is set in real time for the wideband digital signal, and then the corresponding channel filter is used to filter the wideband digital signal by using the filtering mode.
  • the obtained wideband digital signal may be subjected to delay processing, and the filtering mode is set in the delay, and the specific time value of the delay may be It is set in accordance with the time required to complete the setting process of the above filter mode.
  • FIG. 1 The process of adaptive filtering in this embodiment is shown in FIG. 1 and includes:
  • Step 101 Acquire a wideband digital signal interference ratio to be filtered
  • Step 102 Set a channel filtering mode that matches a filtering performance and the interference ratio according to the interference ratio.
  • Step 103 Perform channel filtering on the wideband digital signal by using the set channel filtering mode.
  • the channel filtering in this embodiment may filter the adjacent channel interference of the signal, but is not limited to filtering for the adjacent channel interference of the signal.
  • the interference ratio includes an adjacent frequency interference ratio.
  • acquiring the interference ratio of the wideband digital signal to be filtered includes:
  • Step 201 intercepting at least one segment from the wideband digital signal to be subjected to filtering processing as a sample wideband digital signal;
  • the number of interception in this step can be flexibly selected according to specific application scenarios (such as requirements for accuracy and real-time requirements for filtering processing), and a segment of a preset length can be intercepted as a sample wideband digital signal in a bandwidth digital signal period.
  • a segment of a preset length can be intercepted as a sample wideband digital signal in a bandwidth digital signal period.
  • the interference situation provides a better basis for the setting of the subsequent interference mode; the wideband digital signal of the entire period can also be directly intercepted as the sample bandwidth digital signal, so as to accurately characterize the interference situation.
  • Step 202 Extract an in-band signal and an adjacent-frequency interference signal of the sample wideband digital signal.
  • the extraction method of the in-band signal and the adjacent-frequency interference signal may be extracted by using a corresponding filter, or may be extracted by any other effective method.
  • Step 203 Calculate the power of the in-band signal and the power of the adjacent-frequency interference signal, and use the ratio of the power of the in-band signal to the power of the adjacent-frequency interference signal as the adjacent-channel interference ratio.
  • the obtained adjacent channel interference ratio may be compared with the corresponding adjacent channel interference ratio threshold in the foregoing step 102, so that the channel filtering mode in which the filtering performance matches the adjacent frequency interference ratio is set according to the comparison result.
  • the number of interference ratio thresholds can be flexibly set according to requirements, for example, it can be set to one, and a relatively coarse division of the interference scene can be performed, or multiple settings can be set to perform a more precise fine on the interference scene. Minute.
  • the following embodiment is exemplified by setting the preset adjacent channel interference ratio threshold to two.
  • the preset adjacent channel interference ratio threshold set at this time includes a first preset adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold (the second preset adjacent channel interference ratio threshold is greater than the first preset adjacent channel interference ratio) Threshold), comparing the obtained adjacent channel interference ratio with a preset first set adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold, and setting a corresponding channel filtering mode according to the comparison result, as follows:
  • the filtering performance is high.
  • the out-of-band adjacent-frequency interference is generally indicated, so filtering is set.
  • the performance is a channel filtering mode with out-of-band rejection performance in the performance of the medium pass band;
  • the outband adjacent channel interference is weak, which is a low adjacent frequency interference scenario, and sufficient passband performance is required to minimize the useful carrier.
  • the signal is lost, so the filtering performance is set to the channel filtering mode of the high pass band performance.
  • the channel filtering mode in this embodiment is mainly for different filtering performances, that is, the corresponding filter coefficients are correspondingly adjusted to meet different filtering performances, and different filtering performances are corresponding. Different filtering modes.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the adaptive filtering device in this embodiment can be used in various application scenarios, and is suitable for processing a received wireless signal by a wideband receiver.
  • the application of the wideband receiver will be described below as an example.
  • FIG. 3 is a schematic structural diagram of a wideband receiver, which includes an antenna 11, an RF channel 12, an ADC (Analog-to-Digital Converter) module 13, a digital intermediate frequency module 14, and a baseband.
  • Module 15 the signal processing process is:
  • the RF channel 12 receives the RF signal through the antenna 11 and performs analog filtering, amplification, and frequency shifting to obtain an analog intermediate frequency or baseband signal, and the ADC module 13 performs analog-to-digital conversion on the analog intermediate frequency or baseband signal to obtain a wideband digital intermediate frequency signal, which is provided to Digital intermediate frequency module 14.
  • the digital intermediate frequency module 14 performs channel filtering and the like on the wideband digital intermediate frequency signal to obtain a digital baseband signal of the carrier, and the baseband module 15 performs processing such as reception demodulation and decoding.
  • a filtering device capable of improving filtering performance is proposed mainly for the channel filtering processing link in the above processing flow.
  • the following examples are as follows:
  • the present embodiment does not immediately perform channel filtering processing, but first acquires the interference condition of the wideband digital signal.
  • the interference ratio can be used to characterize the interference of the wideband digital signal, and then according to the obtained
  • the interference condition is that the wideband digital signal sets the filtering mode with the most matching filtering performance in real time, and then the corresponding channel filter uses the filtering mode to filter the wideband digital signal.
  • the obtained wideband digital signal may be subjected to delay processing by the delay unit, and the filtering mode is set in the delay, and the specific time value of the delay may be completed according to the above.
  • the setting process of the filter mode is set by the time required.
  • the adaptive filtering apparatus of this embodiment includes an interference ratio acquiring unit 21, a filtering mode setting unit 22, and a channel filtering unit 23.
  • the interference ratio acquisition unit 21 is configured to acquire an interference ratio of the wideband digital signal to be subjected to the filtering process
  • the filter mode setting unit 22 is configured to set a channel filtering mode of the wideband digital signal according to the interference ratio
  • the channel filtering unit 23 is configured to perform channel filtering on the wideband digital signal by using the channel filtering mode
  • the device further includes: a delay unit 24 configured to perform delay processing on the obtained wideband digital signal, and complete setting of the filtering mode in a delay, and the time value of the delay unit 24 may be completed according to the completion.
  • the setting process of the above filter mode is set by the time required.
  • the channel filtering in this embodiment may filter the adjacent channel interference of the signal, but is not limited to filtering for the adjacent channel interference of the signal.
  • the interference ratio acquisition unit 21 further includes a signal processing module 211 and an interference ratio calculation module 212.
  • the signal processing module 211 is configured to intercept at least one segment from the wideband digital signal to be subjected to filtering processing. Sample wideband digital signal; it should be understood that the number of intercepts can be flexibly selected according to specific application scenarios (such as requirements for accuracy and real-time requirements for filtering processing), and the preset length can be intercepted in the wideband digital signal period.
  • the interference ratio calculation module 212 is configured to extract the in-band signal and the interference signal of the sample wideband digital signal, calculate the power of the in-band signal and the power of the interference signal, and use the ratio of the power of the in-band signal to the power of the interference signal as Interference ratio.
  • the interference ratio calculation module 212 in this embodiment includes an adjacent frequency interference signal processing sub-module, and the interference ratio includes an adjacent frequency interference ratio; the adjacent frequency interference signal processing sub-module is configured to extract an in-band signal and an adjacent frequency of the sample wideband digital signal.
  • the interference signal calculates a power of the in-band signal and a power of the adjacent-frequency interference signal, and uses a ratio of a power of the in-band signal to a power of the adjacent-frequency interference signal as an adjacent-channel interference ratio.
  • the filtering mode setting unit 22 in this embodiment includes an adjacent frequency interference filtering setting module, and the adjacent frequency interference filtering setting module is configured to set the adjacent frequency interference ratio to a preset neighbor when the interference ratio includes an adjacent frequency interference ratio.
  • the frequency interference is compared with the threshold, and the adjacent channel interference channel filtering mode whose filtering performance matches the adjacent frequency interference ratio is determined according to the comparison result.
  • the number of the interference ratio thresholds in this embodiment can be flexibly set according to the requirements. For example, it can be set to one.
  • the interference scene can be divided into a rougher one, or multiple, to accurately compare the interference scene. Subdivision.
  • the following embodiment is exemplified by setting the preset adjacent channel interference ratio threshold to two.
  • the preset adjacent channel interference ratio threshold set at this time includes a first preset adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold (the second preset adjacent channel interference ratio threshold is greater than the first preset adjacent channel interference ratio) Threshold).
  • the channel filtering mode with the filtering performance being high out-of-band rejection performance is set;
  • the filtering performance is set to the medium-passband performance.
  • the channel filtering mode with the filtering performance being the high pass band performance is set.
  • the interference ratio obtaining unit 61 includes a signal processing module 611 and an interference ratio calculating module 612.
  • the signal processing module 611 is configured to intercept at least one segment from the wideband digital signal as a sample wideband digital signal. It should be understood that the number of interceptions can be flexibly selected according to specific application scenarios (such as requirements for accuracy and real-time requirements for filtering processing), and a segment of a preset length can be intercepted as a sample bandwidth during the period of the wideband digital signal.
  • Digital signal as long as the sampled wideband digital signal intercepted can effectively characterize the interference of the wideband digital signal; or two or more segments of the wideband digital signal can be intercepted as a sample wideband digital signal for more accurate characterization
  • the interference condition of the wideband digital signal provides a better basis for the setting of the subsequent interference mode; the wideband digital signal of the entire period can also be directly intercepted as the sample bandwidth digital signal, so as to accurately characterize the interference situation.
  • the interference ratio calculation module 612 is configured to extract an in-band signal and an interference signal of the sample wideband digital signal, calculate a power of the in-band signal and a power of the interference signal, and compare the power of the in-band signal with the The ratio of the power of the interference signal is used as the interference ratio.
  • the interference ratio calculation module 612 includes an adjacent interference ratio calculation submodule 6121, the interference ratio includes an adjacent frequency interference ratio, and the adjacent frequency interference ratio calculation submodule 6121 is configured to extract the sample wideband digital signal. In-band signal and adjacent-frequency interference signal, calculating a power of the in-band signal and a power of the adjacent-frequency interference signal, and using a ratio of a power of the in-band signal to a power of the adjacent-frequency interference signal as an adjacent frequency Interference ratio.
  • the adjacent-frequency interference ratio calculation sub-module 6121 includes a first low-pass filter configured to extract an in-band signal of the sample wideband digital signal, and the adjacent-frequency interference ratio calculation sub-module 6121 further includes a second a low pass filter (or first band pass filter) configured to extract a left adjacent frequency interference signal after the spectrum is shifted right in the sample wideband digital signal, the adjacent frequency interference ratio calculation submodule 6121 including a third low pass A filter (or a second band pass filter) is arranged to extract a right adjacent frequency interference signal after the left shift of the spectrum in the sample wideband digital signal.
  • the filtering mode setting unit 62 in this embodiment includes an adjacent frequency interference filtering setting module 621, and the adjacent frequency interference filtering setting unit 621 is configured to compare the adjacent frequency interference ratio when the interference ratio includes an adjacent frequency interference ratio. Comparing with the preset adjacent-channel interference ratio threshold, determining, according to the comparison result, the adjacent-frequency interference channel filtering mode in which the filtering performance matches the adjacent-frequency interference ratio;
  • the number of adjacent interferences in the present embodiment can be flexibly set according to the requirements of the threshold, for example, it can be set to one, and a relatively coarse division of the interference scene can be performed, or multiple settings can be performed to perform an interference scenario. More precise subdivision.
  • the preset adjacent-channel interference ratio threshold in the adjacent-frequency interference filtering setting sub-unit is compared with the adjacent-frequency interference ratio, and the channel filtering mode in which the filtering performance matches the adjacent-frequency interference ratio is determined according to the comparison result.
  • the adjacent channel interference ratio threshold when the adjacent channel interference ratio threshold is set to two, the first adjacent channel interference ratio threshold and the second adjacent channel interference ratio threshold may be set, and the second adjacent channel interference ratio threshold is greater than the first neighbor. Frequency interference ratio threshold.
  • the channel filtering mode with the filtering performance being high out-of-band rejection performance is set; when the comparison result is that the adjacent-frequency interference ratio is greater than or When the first preset adjacent channel interference ratio threshold is equal to or less than or equal to the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the outband suppression performance in the middle passband performance is set; As a result, when the adjacent-channel interference ratio is greater than the second preset adjacent-channel interference ratio threshold, the channel filtering mode in which the filtering performance is high-passband performance is set.
  • the channel filtering unit 63 in this embodiment includes a filter 631 for filtering, and the channel filtering unit 63 is provided with at least one filter 631 whose filter parameters are adjustable, or a plurality of filters 631 having different filter parameters.
  • the channel filtering unit 23 is provided with a filter 631 with adjustable filter coefficients, and the filter parameters are adjusted accordingly for different filtering performances. Filtering for different wideband digital signals.
  • the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and the computer executable instructions are implemented to implement an adaptive filtering method.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the above technical solution solves the performance tradeoff of the fixed channel filter in different in-band signals and adjacent-band interference scenarios, and the filtering effect is not good, so that the signal filtering effect is better.

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Abstract

A self-adaptive filtering method, comprising: acquiring an interference ratio of a broadband digital signal on which filtering processing is to be performed; setting a filtering performance and a channel filtering mode matching the interference ratio according to the interference ratio; and using the channel filtering mode to perform channel filtering on the broadband digital signal. The technical solution solves the problems of a performance tradeoff and a bad filtering effect of a fixed channel filter in different in-band signal and adjacent-channel interference scenarios, so as to achieve a better signal filtering effect.

Description

一种自适应滤波方法和装置Adaptive filtering method and device 技术领域Technical field
本文涉及但不限于无线通信领域，涉及一种自适应滤波方法和装置。This document relates to, but is not limited to, the field of wireless communications, and relates to an adaptive filtering method and apparatus.
背景技术Background technique
在无线通信系统中，无线干扰是多种多样的。通常，有源设备在发射有用信号时，由于器件本身的原因和滤波器带外抑制的限制，在工作频带外会产生杂散、谐波、互调等无用信号，这些信号落到其他无线系统的工作频带内，就会对其形成干扰，通常包括邻频干扰和同频干扰。In wireless communication systems, wireless interference is diverse. Generally, when a useful device transmits a useful signal, due to the limitation of the device itself and the out-of-band rejection of the filter, unwanted signals such as spurious, harmonic, and intermodulation are generated outside the operating band, and these signals fall to other wireless systems. In the working frequency band, it will form interference, usually including adjacent channel interference and co-channel interference.
窄带通信系统，比如GSM(Global System for Mobile Communication，全球移动通信系统)同一个小区中，不会配置相邻的载波(一个小区配置相邻载波时，会利用跳频来解决邻频的相互干扰)。宽带通信系统，比如E-UTRAN(Evolved Universal Terrestrial Radio Access Network，演进的通用移动通信系统陆地无线接入网)20M的载波带宽，有用载波只占了18MHz带宽，两边分别有一个1MHz带宽用于载波间的隔离保护，降低载波间干扰。Narrowband communication systems, such as GSM (Global System for Mobile Communication), do not configure adjacent carriers in the same cell. When a cell is configured with adjacent carriers, frequency hopping is used to resolve mutual interference of adjacent frequencies. ). Broadband communication system, such as E-UTRAN (Evolved Universal Terrestrial Radio Access Network) 20M carrier bandwidth, useful carrier only accounts for 18MHz bandwidth, and each side has a 1MHz bandwidth for carrier Inter-isolation protection reduces inter-carrier interference.
同样，不同无线制式之间也要考虑载波的保护间隔。由于频谱资源有限，为了提高频谱利用率，常常会降低载波间的保护间隔，导致出现邻频干扰情况。比如邻小区之间，就可能存在邻频的干扰。不同制式之间的频带间隔降低。尤其对于基站接收机，由于用户设备(UE，User Equipment)到基站接收机的信号电平范围很大，邻频干扰可能很严重，会严重影响接收性能。Similarly, the guard interval of the carrier should also be considered between different wireless standards. Due to limited spectrum resources, in order to improve spectrum utilization, the guard interval between carriers is often reduced, resulting in adjacent channel interference. For example, between adjacent cells, there may be interference of adjacent frequencies. The frequency band spacing between different modes is reduced. Especially for the base station receiver, since the signal level range of the user equipment (UE, User Equipment) to the base station receiver is large, the adjacent frequency interference may be severe, which may seriously affect the reception performance.
相关技术中，针对载波所有的干扰场景，信道滤波器采用的是一个相对固定的滤波模式对载波数据进行滤波，滤除带外干扰。因为信道滤波器受实现的限制，必须在带内纹波、带外抑制、过渡带宽度等指标之间进行折中考虑。信道滤波器采用的滤波模式固定，其通带内性能和带外抑制性能也就是固定的，信道滤波器的性能是折中的结果，必然会导致不能在所有干扰场景下做到滤波性能最优。例如，在低邻频干扰场景，固定滤波模式的信道滤波器会对有用载波信号损失较多，不能获取最好的接收性能。在高邻频干扰场景，固定滤波模式的滤波器对邻频干扰的抑制不够，也不能获取更高的接收 性能。In the related art, for all interference scenarios of the carrier, the channel filter adopts a relatively fixed filtering mode to filter the carrier data to filter out-band interference. Because channel filters are limited by implementation, compromises must be made between in-band ripple, out-of-band rejection, and transition band width. The filter mode adopted by the channel filter is fixed, and its passband performance and out-of-band rejection performance are fixed. The performance of the channel filter is a compromise result, which inevitably leads to the inability to achieve optimal filtering performance in all interference scenarios. . For example, in a low adjacent frequency interference scenario, the channel filter of the fixed filtering mode will lose more useful carrier signals and cannot obtain the best reception performance. In the high adjacent frequency interference scenario, the filter of the fixed filtering mode does not suppress the adjacent channel interference, and can not obtain higher reception. performance.
发明内容Summary of the invention
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.
本发明实施例提供一种自适应滤波方法和装置，解决了信道滤波器针对不同干扰场景采用固定滤波模式而导致的滤波性能不好的问题。The embodiment of the invention provides an adaptive filtering method and device, which solves the problem that the channel filter has poor filtering performance caused by adopting a fixed filtering mode for different interference scenarios.
本发明实施例公开了一种自适应滤波方法，所述自适应滤波方法包括：An embodiment of the present invention discloses an adaptive filtering method, where the adaptive filtering method includes:
获取待进行滤波处理的宽带数字信号的干扰比；Obtaining an interference ratio of the wideband digital signal to be filtered;
根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式；And setting a channel filtering mode in which the filtering performance matches the interference ratio according to the interference ratio;
采用所述信道滤波模式对所述宽带数字信号进行信道滤波。The wideband digital signal is channel filtered using the channel filtering mode.
可选地，获取所述待进行滤波处理的宽带数字信号的干扰比包括：Optionally, acquiring an interference ratio of the wideband digital signal to be subjected to filtering processing includes:
从所述待进行滤波处理的宽带数字信号中截取至少一段作为样本宽带数字信号；Extracting at least one segment from the wideband digital signal to be subjected to filtering processing as a sample wideband digital signal;
提取所述样本宽带数字信号的带内信号和干扰信号；Extracting an in-band signal and an interference signal of the sample wideband digital signal;
计算所述带内信号的功率和所述干扰信号的功率，将所述带内信号的功率与所述干扰信号的功率的比值作为干扰比。Calculating a power of the in-band signal and a power of the interference signal, and using a ratio of a power of the in-band signal to a power of the interference signal as an interference ratio.
可选地，所述干扰比包括邻频干扰比。Optionally, the interference ratio includes an adjacent frequency interference ratio.
可选地，所述根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式包括：Optionally, the channel filtering mode that matches the filtering performance according to the interference ratio setting and the interference ratio includes:
将所述邻频干扰比与预设邻频干扰比阈值进行比较，根据比较结果确定滤波性能与该邻频干扰比匹配的邻频干扰信道滤波模式。Comparing the adjacent-channel interference ratio with a preset adjacent-channel interference ratio threshold, and determining, according to the comparison result, an adjacent-channel interference channel filtering mode in which the filtering performance matches the adjacent-frequency interference ratio.
可选地，所述预设邻频干扰比阈值包括第一预设邻频干扰比阈值和第二预设邻频干扰比阈值；Optionally, the preset neighboring interference ratio threshold includes a first preset adjacent interference ratio threshold and a second preset adjacent interference ratio threshold;
所述根据比较结果确定滤波性能与该邻频干扰比匹配的信道滤波模式包括：The channel filtering mode that determines that the filtering performance matches the adjacent frequency interference ratio according to the comparison result includes:
当所述邻频干扰比小于所述第一预设邻频干扰比阈值时，设置滤波性能 为高带外抑制性能的信道滤波模式；Setting filter performance when the adjacent channel interference ratio is less than the first preset adjacent channel interference ratio threshold Channel filtering mode for high out-of-band rejection performance;
当所述邻频干扰比大于或等于所述第一预设邻频干扰比阈值，且小于或等于所述第二预设邻频干扰比阈值时，设置滤波性能为中通带性能中带外抑制性能的信道滤波模式；When the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold and less than or equal to the second preset adjacent-channel interference ratio threshold, setting the filtering performance to be out-of-band in the performance of the medium passband Channel filtering mode that suppresses performance;
当所述邻频干扰比大于所述第二预设邻频干扰比阈值时，设置滤波性能为高通带性能的信道滤波模式。When the adjacent channel interference ratio is greater than the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the high pass band performance is set.
本发明实施例还提供一种自适应滤波装置，所述自适应滤波装置包括：干扰比获取单元、滤波模式设置单元和信道滤波单元；An embodiment of the present invention further provides an adaptive filtering apparatus, where the adaptive filtering apparatus includes: an interference ratio acquiring unit, a filtering mode setting unit, and a channel filtering unit;
所述干扰比获取单元设置为获取待进行滤波处理的宽带数字信号的干扰比；The interference ratio acquisition unit is configured to acquire an interference ratio of the wideband digital signal to be subjected to filtering processing;
所述滤波模式设置单元设置为根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式；The filtering mode setting unit is configured to set a channel filtering mode in which a filtering performance matches the interference ratio according to the interference ratio;
所述信道滤波单元设置为采用所述信道滤波模式对所述宽带数字信号进行信道滤波。The channel filtering unit is configured to perform channel filtering on the wideband digital signal by using the channel filtering mode.
可选地，所述干扰比获取单元包括：信号处理模块和干扰比计算模块；Optionally, the interference ratio obtaining unit includes: a signal processing module and an interference ratio calculating module;
所述信号处理模块设置为从所述待进行滤波处理的宽带数字信号中截取至少一段作为样本宽带数字信号；The signal processing module is configured to intercept at least one segment as a sample wideband digital signal from the wideband digital signal to be subjected to filtering processing;
所述干扰比计算模块设置为提取所述样本宽带数字信号的带内信号和干扰信号，计算所述带内信号的功率和所述干扰信号的功率，将所述带内信号的功率与所述干扰信号的功率的比值作为干扰比。The interference ratio calculation module is configured to extract an in-band signal and an interference signal of the sample wideband digital signal, calculate a power of the in-band signal and a power of the interference signal, and compare the power of the in-band signal with the The ratio of the power of the interference signal is taken as the interference ratio.
可选地，所述干扰比计算模块包括邻频干扰比计算子模块，所述干扰比包括邻频干扰比；所述邻频干扰比计算子模块设置为提取所述样本宽带数字信号的带内信号和邻频干扰信号，计算所述带内信号的功率和所述邻频干扰信号的功率，将所述带内信号的功率与所述邻频干扰信号的功率的比值作为邻频干扰比。Optionally, the interference ratio calculation module includes an adjacent frequency interference ratio calculation submodule, where the interference ratio includes an adjacent frequency interference ratio, and the adjacent frequency interference ratio calculation submodule is configured to extract the inband of the sample wideband digital signal. The signal and the adjacent-frequency interference signal calculate the power of the in-band signal and the power of the adjacent-frequency interference signal, and the ratio of the power of the in-band signal to the power of the adjacent-frequency interference signal is used as an adjacent-channel interference ratio.
可选地，所述滤波模式设置单元包括邻频干扰滤波设置模块，所述邻频干扰滤波设置模块设置为将所述邻频干扰比与预设邻频干扰比阈值进行比 较，根据比较结果确定滤波性能与该邻频干扰比匹配的邻频干扰信道滤波模式。Optionally, the filtering mode setting unit includes an adjacent frequency interference filtering setting module, and the adjacent frequency interference filtering setting module is configured to compare the adjacent frequency interference ratio with a preset adjacent frequency interference ratio threshold. Comparing, the adjacent channel interference channel filtering mode in which the filtering performance matches the adjacent frequency interference ratio is determined according to the comparison result.
可选地，所述预设邻频干扰比阈值包括第一预设邻频干扰比阈值和第二预设邻频干扰比阈值；所述邻频干扰滤波设置模块通过如下方式实现根据比较结果确定滤波性能与该邻频干扰比匹配的信道滤波模式：Optionally, the preset neighboring interference ratio threshold includes a first preset adjacent interference ratio threshold and a second preset adjacent interference ratio threshold; and the adjacent interference filtering setting module is determined according to the comparison result by: Channel filtering mode with filtering performance matching the adjacent frequency interference ratio:
当比较结果为所述邻频干扰比小于所述第一预设邻频干扰比阈值时，设置滤波性能为高带外抑制性能的信道滤波模式；When the comparison result is that the adjacent-channel interference ratio is smaller than the first preset adjacent-channel interference ratio threshold, the channel filtering mode with the filtering performance being high out-of-band rejection performance is set;
当比较结果为所述邻频干扰比大于或等于所述第一预设邻频干扰比阈值，且小于或等于所述第二预设邻频干扰比阈值时，设置滤波性能为中通带性能中带外抑制性能的信道滤波模式；When the comparison result is that the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold, and is less than or equal to the second preset adjacent-channel interference ratio threshold, setting a filtering performance to a medium passband performance Channel filtering mode with out-of-band rejection performance;
当比较结果为所述邻频干扰比大于所述第二预设邻频干扰比阈值时，设置滤波性能为高通带性能的信道滤波模式。When the comparison result is that the adjacent channel interference ratio is greater than the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the high pass band performance is set.
本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行时实现自适应滤波方法。The embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and the computer executable instructions are implemented to implement an adaptive filtering method.
本发明实施例的有益效果是：The beneficial effects of the embodiments of the present invention are:
本发明实施例提供一种自适应滤波方法和装置，在对得到的宽带数字信号进行滤波之前，获取到该宽带数字信号的干扰比，也即获取到该宽带数字信号的干扰情况；根据该宽带数字信号的干扰比设置滤波性能与该干扰比匹配的信道滤波模式；基于实时设置的信道滤波模式对该宽带数字信号进行滤波。可见，本发明实施例在对得到的宽带数字信号进行滤波之前，会根据当前宽带数字信号的当前干扰比情况为其实时匹配一个滤波性能最为适配的滤波模式，也即根据当前待滤波处理的信号干扰情况为其自适应的匹配到最佳的滤波模式，并不是统一采用以性能折中的固定滤波模式对其进行简单的滤波，可以得到更好的滤波性能。An embodiment of the present invention provides an adaptive filtering method and apparatus, which acquires an interference ratio of the wideband digital signal, that is, an interference condition of the wideband digital signal, before the obtained wideband digital signal is filtered; The interference of the digital signal is set to a channel filtering mode in which the filtering performance matches the interference ratio; the wideband digital signal is filtered based on a channel filtering mode set in real time. It can be seen that, before filtering the obtained wideband digital signal, the embodiment of the present invention matches a filtering mode with the most suitable filtering performance in real time according to the current interference ratio of the current wideband digital signal, that is, according to the current filtering process. The signal interference condition is adaptively matched to the optimal filtering mode. It is not uniformly filtered by the fixed filtering mode with performance compromise, and better filtering performance can be obtained.
在阅读并理解了附图和详细描述后，可以明白其它方面。 Other aspects will be apparent upon reading and understanding the drawings and detailed description.
附图说明DRAWINGS
图1为本发明实施例一中的自适应滤波方法的流程示意图；1 is a schematic flowchart of an adaptive filtering method according to Embodiment 1 of the present invention;
图2为本发明实施例一中的获取干扰比的流程示意图；2 is a schematic flowchart of acquiring an interference ratio according to Embodiment 1 of the present invention;
图3为本发明实施例二中的宽带接收机的系统框图；3 is a system block diagram of a wideband receiver in Embodiment 2 of the present invention;
图4为本发明实施例二中的自适应滤波装置的结构示意图；4 is a schematic structural diagram of an adaptive filtering apparatus according to Embodiment 2 of the present invention;
图5为本发明实施例二中的自适应滤波装置的另一结构示意图；FIG. 5 is another schematic structural diagram of an adaptive filtering apparatus according to Embodiment 2 of the present invention; FIG.
图6为本发明实施例三中的自适应滤波装置的结构示意图。FIG. 6 is a schematic structural diagram of an adaptive filtering apparatus according to Embodiment 3 of the present invention.
具体实施方式detailed description
下面通过具体实施方式结合附图对本发明实施例作进一步的说明。The embodiments of the present invention are further described below with reference to the accompanying drawings.
实施例一：Embodiment 1:
应当理解的是，本实施例提供的自适应滤波方法是适用于多种应用场景的，尤其适用于宽带接收机对接收到的无线信号的处理。下面以宽带接收机的应用作为示例进行说明。It should be understood that the adaptive filtering method provided by this embodiment is applicable to various application scenarios, and is particularly suitable for processing a received wireless signal by a wideband receiver. The application of the wideband receiver will be described below as an example.
宽带接收机接收处理信号的基本流程为：接收射频信号，对其进行模数转换得到宽带数字信号，对得到的宽带数字信号进行信道滤波等处理后得到数字基带信号，然后对数字基带信息进行接收解调解码等处理。本实施例对上述处理流程中的信道滤波处理环节提出了能提高滤波性能的滤波方式，下面示例说明如下：The basic process of receiving a processed signal by a wideband receiver is: receiving a radio frequency signal, performing analog-to-digital conversion on the wideband digital signal, performing channel filtering on the obtained wideband digital signal, and obtaining a digital baseband signal, and then receiving the digital baseband information. Demodulation and decoding processing. In this embodiment, a filtering method capable of improving filtering performance is proposed for the channel filtering processing link in the above processing flow. The following examples are as follows:
本实施例在得到的宽带数字信号之后，并不是马上对其进行信道滤波处理，而是先获取该宽带数字信号的干扰情况，本实施例可选以干扰比表征宽带数字信号的干扰情况，然后根据得到的干扰情况为宽带数字信号实时设置滤波性能最为匹配的滤波模式，然后让对应的信道滤波器采用该滤波模式对该宽带数字信号进行滤波。After the obtained wideband digital signal, the present embodiment does not immediately perform channel filtering processing, but first acquires the interference condition of the wideband digital signal. In this embodiment, the interference ratio of the wideband digital signal can be characterized by the interference ratio, and then According to the obtained interference condition, the filtering mode with the most matching filtering performance is set in real time for the wideband digital signal, and then the corresponding channel filter is used to filter the wideband digital signal by using the filtering mode.
在上述为宽带数字信号设置滤波模式过程中，可对得到的宽带数字信号进行延时处理，在延时中完成上述滤波模式的设置，该延时的具体时间值可 以根据完成上述滤波模式的设置过程所需时间而设定。In the process of setting the filtering mode for the wideband digital signal, the obtained wideband digital signal may be subjected to delay processing, and the filtering mode is set in the delay, and the specific time value of the delay may be It is set in accordance with the time required to complete the setting process of the above filter mode.
本实施例的自适应滤波的过程请参见图1所示，包括：The process of adaptive filtering in this embodiment is shown in FIG. 1 and includes:
步骤101：获取待滤波处理的宽带数字信号干扰比；Step 101: Acquire a wideband digital signal interference ratio to be filtered;
步骤102：根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式；Step 102: Set a channel filtering mode that matches a filtering performance and the interference ratio according to the interference ratio.
步骤103：采用设置好的信道滤波模式对宽带数字信号进行信道滤波。Step 103: Perform channel filtering on the wideband digital signal by using the set channel filtering mode.
应当的理解的是，本实施例中的信道滤波可针对信号的邻频干扰情况进行滤波，却不仅限于针对信号的邻频干扰情况进行滤波。It should be understood that the channel filtering in this embodiment may filter the adjacent channel interference of the signal, but is not limited to filtering for the adjacent channel interference of the signal.
本实施例中，所述干扰比包括邻频干扰比。请参见图2所示，针对邻频干扰比，获取所述待进行滤波处理的宽带数字信号的干扰比包括：In this embodiment, the interference ratio includes an adjacent frequency interference ratio. Referring to FIG. 2, for the adjacent-channel interference ratio, acquiring the interference ratio of the wideband digital signal to be filtered includes:
步骤201：从所述待进行滤波处理的宽带数字信号中截取至少一段作为样本宽带数字信号；Step 201: intercepting at least one segment from the wideband digital signal to be subjected to filtering processing as a sample wideband digital signal;
该步骤截取的数量可以根据具体应用场景(例如对精度的要求以及对滤波处理实时性的要求等因素)具体灵活选择，可以在带宽数字信号周期内截取预设长度的一段作为样本宽带数字信号，只要所截取的样本宽带数字信号能有效表征该宽带数字信号的干扰情况即可；也可在带宽数字信号周期内截取两段或三段以上作为样本宽带数字信号，以更精确的表征宽带数字信号的干扰情况，为后续干扰模式的设置提供更好的依据；也可以直接截取整个周期的宽带数字信号作为样本带宽数字信号，以便准确的表征干扰情况。The number of interception in this step can be flexibly selected according to specific application scenarios (such as requirements for accuracy and real-time requirements for filtering processing), and a segment of a preset length can be intercepted as a sample wideband digital signal in a bandwidth digital signal period. As long as the intercepted sample wideband digital signal can effectively characterize the interference of the wideband digital signal; two or more segments of the wideband digital signal can be intercepted in the bandwidth digital signal period to more accurately characterize the wideband digital signal. The interference situation provides a better basis for the setting of the subsequent interference mode; the wideband digital signal of the entire period can also be directly intercepted as the sample bandwidth digital signal, so as to accurately characterize the interference situation.
步骤202：提取样本宽带数字信号的带内信号和邻频干扰信号；Step 202: Extract an in-band signal and an adjacent-frequency interference signal of the sample wideband digital signal.
对于带内信号和邻频干扰信号的提取方式可以采用相应的滤波器提取，也可采用其他任意有效方式提取。The extraction method of the in-band signal and the adjacent-frequency interference signal may be extracted by using a corresponding filter, or may be extracted by any other effective method.
步骤203：计算带内信号的功率和邻频干扰信号的功率，将带内信号的功率与邻频干扰信号的功率的比值作为邻频干扰比。Step 203: Calculate the power of the in-band signal and the power of the adjacent-frequency interference signal, and use the ratio of the power of the in-band signal to the power of the adjacent-frequency interference signal as the adjacent-channel interference ratio.
在得到邻频干扰比后，上述步骤102中可以将得到的邻频干扰比与对应的邻频干扰比阈值进行比较，从而根据比较结果设置滤波性能与该邻频干扰比匹配的信道滤波模式。 After the adjacent channel interference ratio is obtained, the obtained adjacent channel interference ratio may be compared with the corresponding adjacent channel interference ratio threshold in the foregoing step 102, so that the channel filtering mode in which the filtering performance matches the adjacent frequency interference ratio is set according to the comparison result.
本实施例中干扰比阈值设置的个数可以根据需求灵活设置，例如可设置为一个，对干扰场景进行一个比较粗的划分，也可以设置为多个，以对干扰场景进行一个比较精确的细分。In this embodiment, the number of interference ratio thresholds can be flexibly set according to requirements, for example, it can be set to one, and a relatively coarse division of the interference scene can be performed, or multiple settings can be set to perform a more precise fine on the interference scene. Minute.
下面本实施例以预设邻频干扰比阈值设置为两个为例进行示例说明。此时设置的预设邻频干扰比阈值包括第一预设邻频干扰比阈值和第二预设邻频干扰比阈值(第二预设邻频干扰比阈值大于第一预设邻频干扰比阈值)，将得到的邻频干扰比与预设第一设邻频干扰比阈值和第二预设邻频干扰比阈值进行比较，根据比较结果设置对应的信道滤波模式，如下：The following embodiment is exemplified by setting the preset adjacent channel interference ratio threshold to two. The preset adjacent channel interference ratio threshold set at this time includes a first preset adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold (the second preset adjacent channel interference ratio threshold is greater than the first preset adjacent channel interference ratio) Threshold), comparing the obtained adjacent channel interference ratio with a preset first set adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold, and setting a corresponding channel filtering mode according to the comparison result, as follows:
当比较结果为邻频干扰比小于第一预设邻频干扰比阈值时，此时表明带外邻频干扰较强，为高邻频干扰场景，需加强带外抑制，因此设置滤波性能为高带外抑制性能的信道滤波模式；When the comparison result is that the adjacent channel interference ratio is smaller than the first preset adjacent channel interference ratio threshold, it indicates that the outband adjacent channel interference is strong, and the high adjacent channel interference scenario needs to be enhanced. Therefore, the filtering performance is high. Channel filtering mode with out-of-band rejection performance;
当比较结果为邻频干扰比大于或等于第一预设邻频干扰比阈值，且小于或等于第二预设邻频干扰比阈值时，此时表明带外邻频干扰情况一般，因此设置滤波性能为中通带性能中带外抑制性能的信道滤波模式即可；When the comparison result is that the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold and less than or equal to the second preset adjacent-channel interference ratio threshold, the out-of-band adjacent-frequency interference is generally indicated, so filtering is set. The performance is a channel filtering mode with out-of-band rejection performance in the performance of the medium pass band;
当比较结果为邻频干扰比大于第二预设邻频干扰比阈值时，此时表明带外邻频干扰较弱，为低邻频干扰场景，需保证足够的通带性能尽可能减少有用载波信号损失，因此设置滤波性能为高通带性能的信道滤波模式。When the comparison result is that the adjacent channel interference ratio is greater than the second preset adjacent channel interference ratio threshold, the outband adjacent channel interference is weak, which is a low adjacent frequency interference scenario, and sufficient passband performance is required to minimize the useful carrier. The signal is lost, so the filtering performance is set to the channel filtering mode of the high pass band performance.
应当理解的是，本实施例中的信道滤波模式主要是针对不同的滤波性能而言的，也即对相应的滤波器系数进行对应的调整设置以满足不同滤波性能，而不同的滤波性能则对应不同的滤波模式。It should be understood that the channel filtering mode in this embodiment is mainly for different filtering performances, that is, the corresponding filter coefficients are correspondingly adjusted to meet different filtering performances, and different filtering performances are corresponding. Different filtering modes.
实施例二：Embodiment 2:
本实施例结合自适应滤波装置做进一步说明。本实施例中的自适应滤波装置可用于多种应用场景的，适用于宽带接收机对接收到的无线信号的处理。下面以宽带接收机的应用作为示例进行说明。This embodiment is further described in conjunction with an adaptive filtering device. The adaptive filtering device in this embodiment can be used in various application scenarios, and is suitable for processing a received wireless signal by a wideband receiver. The application of the wideband receiver will be described below as an example.
请参见图3所示，该图所示为宽带接收机的结构示意图，其包括天线11、射频通道12、ADC(Analog-to-Digital Converter，模数转换)模块13、数字中频模块14以及基带模块15，其信号处理过程为： Please refer to FIG. 3, which is a schematic structural diagram of a wideband receiver, which includes an antenna 11, an RF channel 12, an ADC (Analog-to-Digital Converter) module 13, a digital intermediate frequency module 14, and a baseband. Module 15, the signal processing process is:
射频通道12通过天线11接收射频信号并对其进行模拟滤波、放大、频率搬移，得到模拟中频或者基带信号，ADC模块13对模拟中频或者基带信号进行模数转换，得到宽带数字中频信号，提供给数字中频模块14。数字中频模块14对宽带数字中频信号进行信道滤波等处理得到载波的数字基带信号，供基带模块15进行接收解调解码等处理。本实施例则主要对上述处理流程中的信道滤波处理环节提出了能提高滤波性能的滤波装置，下面示例说明如下：The RF channel 12 receives the RF signal through the antenna 11 and performs analog filtering, amplification, and frequency shifting to obtain an analog intermediate frequency or baseband signal, and the ADC module 13 performs analog-to-digital conversion on the analog intermediate frequency or baseband signal to obtain a wideband digital intermediate frequency signal, which is provided to Digital intermediate frequency module 14. The digital intermediate frequency module 14 performs channel filtering and the like on the wideband digital intermediate frequency signal to obtain a digital baseband signal of the carrier, and the baseband module 15 performs processing such as reception demodulation and decoding. In this embodiment, a filtering device capable of improving filtering performance is proposed mainly for the channel filtering processing link in the above processing flow. The following examples are as follows:
本实施例在得到宽带数字信号之后，并不是马上对其进行信道滤波处理，而是先获取该宽带数字信号的干扰情况，本实施例可选以干扰比表征宽带数字信号干扰情况，然后根据得到的干扰情况为宽带数字信号实时设置滤波性能最为匹配的滤波模式，然后让对应的信道滤波器采用该滤波模式对该宽带数字信号进行滤波。After obtaining the wideband digital signal, the present embodiment does not immediately perform channel filtering processing, but first acquires the interference condition of the wideband digital signal. In this embodiment, the interference ratio can be used to characterize the interference of the wideband digital signal, and then according to the obtained The interference condition is that the wideband digital signal sets the filtering mode with the most matching filtering performance in real time, and then the corresponding channel filter uses the filtering mode to filter the wideband digital signal.
在上述为宽带数字信号设置滤波模式过程中，可对得到的宽带数字信号通过延时单元进行延时处理，在延时中完成上述滤波模式的设置，该延时的具体时间值可以根据完成上述滤波模式的设置过程所需时间而设定。In the process of setting the filtering mode for the wideband digital signal, the obtained wideband digital signal may be subjected to delay processing by the delay unit, and the filtering mode is set in the delay, and the specific time value of the delay may be completed according to the above. The setting process of the filter mode is set by the time required.
本实施例的自适应滤波装置请参见图4所示，包括：干扰比获取单元21、滤波模式设置单元22和信道滤波单元23。Referring to FIG. 4, the adaptive filtering apparatus of this embodiment includes an interference ratio acquiring unit 21, a filtering mode setting unit 22, and a channel filtering unit 23.
干扰比获取单元21设置为获取待进行滤波处理的宽带数字信号的干扰比；The interference ratio acquisition unit 21 is configured to acquire an interference ratio of the wideband digital signal to be subjected to the filtering process;
滤波模式设置单元22设置为根据所述干扰比设置该宽带数字信号的信道滤波模式；The filter mode setting unit 22 is configured to set a channel filtering mode of the wideband digital signal according to the interference ratio;
信道滤波单元23设置为采用所述信道滤波模式对所述宽带数字信号进行信道滤波；The channel filtering unit 23 is configured to perform channel filtering on the wideband digital signal by using the channel filtering mode;
可选地，所述装置还包括：延时单元24，设置为对得到的宽带数字信号进行延时处理，在延时中完成上述滤波模式的设置，该延时单元24的时间值可以根据完成上述滤波模式的设置过程所需时间而设定。Optionally, the device further includes: a delay unit 24 configured to perform delay processing on the obtained wideband digital signal, and complete setting of the filtering mode in a delay, and the time value of the delay unit 24 may be completed according to the completion. The setting process of the above filter mode is set by the time required.
应当的理解的是，本实施例中的信道滤波可针对信号的邻频干扰情况进行滤波，却不仅限于针对信号的邻频干扰情况进行滤波。 It should be understood that the channel filtering in this embodiment may filter the adjacent channel interference of the signal, but is not limited to filtering for the adjacent channel interference of the signal.
本实施例中，干扰比获取单元21还包括信号处理模块211和干扰比计算模块212，请参见图5，信号处理模块211设置为从待进行滤波处理的所述宽带数字信号中截取至少一段作为样本宽带数字信号；应当理解的是截取的数量可以根据具体应用场景(例如对精度的要求以及对滤波处理实时性的要求等因素)具体灵活选择，可以在宽带数字信号周期内截取预设长度的一段作为样本宽带数字信号，只要所截取的样本宽带数字信号能有效表征该宽带数字信号的干扰情况即可；也可在宽带数字信号周期内截取两段或三段以上作为样本宽带数字信号，以更精确的表征宽带数字信号的干扰情况，为后续干扰模式的设置提供更好的依据；也可以直接截取整个周期的信号作为样本宽带数字信号，以便准确的表征干扰情况。干扰比计算模块212设置为提取样本宽带数字信号的带内信号和干扰信号，计算带内信号的功率和干扰信号的功率，将所述带内信号的功率与所述干扰信号的功率的比值作为干扰比。In this embodiment, the interference ratio acquisition unit 21 further includes a signal processing module 211 and an interference ratio calculation module 212. Referring to FIG. 5, the signal processing module 211 is configured to intercept at least one segment from the wideband digital signal to be subjected to filtering processing. Sample wideband digital signal; it should be understood that the number of intercepts can be flexibly selected according to specific application scenarios (such as requirements for accuracy and real-time requirements for filtering processing), and the preset length can be intercepted in the wideband digital signal period. A section of the wideband digital signal as a sample, as long as the sampled wideband digital signal intercepted can effectively characterize the interference of the wideband digital signal; or two or more segments of the wideband digital signal can be intercepted as a sample wideband digital signal to More accurate representation of the interference of wideband digital signals provides a better basis for the setting of subsequent interference modes; it can also directly intercept the entire period of the signal as a sample wideband digital signal in order to accurately characterize the interference situation. The interference ratio calculation module 212 is configured to extract the in-band signal and the interference signal of the sample wideband digital signal, calculate the power of the in-band signal and the power of the interference signal, and use the ratio of the power of the in-band signal to the power of the interference signal as Interference ratio.
本实施例中的干扰比计算模块212包括邻频干扰信号处理子模块，所述干扰比包括邻频干扰比；邻频干扰信号处理子模块设置为提取样本宽带数字信号的带内信号和邻频干扰信号，计算所述带内信号的功率和所述邻频干扰信号的功率，将所述带内信号的功率与所述邻频干扰信号的功率的比值作为邻频干扰比。The interference ratio calculation module 212 in this embodiment includes an adjacent frequency interference signal processing sub-module, and the interference ratio includes an adjacent frequency interference ratio; the adjacent frequency interference signal processing sub-module is configured to extract an in-band signal and an adjacent frequency of the sample wideband digital signal. The interference signal calculates a power of the in-band signal and a power of the adjacent-frequency interference signal, and uses a ratio of a power of the in-band signal to a power of the adjacent-frequency interference signal as an adjacent-channel interference ratio.
本实施例中的滤波模式设置单元22包括邻频干扰滤波设置模块，所述邻频干扰滤波设置模块设置为所述干扰比包括邻频干扰比时，将所述邻频干扰比与预设邻频干扰比阈值进行比较，根据比较结果确定滤波性能与该邻频干扰比匹配的邻频干扰信道滤波模式。The filtering mode setting unit 22 in this embodiment includes an adjacent frequency interference filtering setting module, and the adjacent frequency interference filtering setting module is configured to set the adjacent frequency interference ratio to a preset neighbor when the interference ratio includes an adjacent frequency interference ratio. The frequency interference is compared with the threshold, and the adjacent channel interference channel filtering mode whose filtering performance matches the adjacent frequency interference ratio is determined according to the comparison result.
本实施例中的干扰比阈值设置的个数可以根据的需求灵活设置，例如可设置为一个，对干扰场景进行一个比较粗的划分，也可以设置为多个，以对干扰场景进行一个比较精确的细分。The number of the interference ratio thresholds in this embodiment can be flexibly set according to the requirements. For example, it can be set to one. The interference scene can be divided into a rougher one, or multiple, to accurately compare the interference scene. Subdivision.
下面本实施例以预设邻频干扰比阈值设置为两个为例进行示例说明。此时设置的预设邻频干扰比阈值包括第一预设邻频干扰比阈值和第二预设邻频干扰比阈值(第二预设邻频干扰比阈值大于第一预设邻频干扰比阈值)。The following embodiment is exemplified by setting the preset adjacent channel interference ratio threshold to two. The preset adjacent channel interference ratio threshold set at this time includes a first preset adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold (the second preset adjacent channel interference ratio threshold is greater than the first preset adjacent channel interference ratio) Threshold).
当比较结果为所述邻频干扰比小于所述第一预设邻频干扰比阈值时，设置滤波性能为高带外抑制性能的信道滤波模式； When the comparison result is that the adjacent-channel interference ratio is smaller than the first preset adjacent-channel interference ratio threshold, the channel filtering mode with the filtering performance being high out-of-band rejection performance is set;
当比较结果为所述邻频干扰比大于或等于所述第一预设邻频干扰比阈值时，小于或等于所述第二预设邻频干扰比阈值时，设置滤波性能为中通带性能中带外抑制性能的信道滤波模式；When the comparison result is that the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold, when the second preset adjacent-channel interference ratio threshold is less than or equal to, the filtering performance is set to the medium-passband performance. Channel filtering mode with out-of-band rejection performance;
当比较结果为所述邻频干扰比大于所述第二预设邻频干扰比阈值时，设置滤波性能为高通带性能的信道滤波模式。When the comparison result is that the adjacent channel interference ratio is greater than the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the high pass band performance is set.
实施例三Embodiment 3
下面以邻频干扰为示例做进一步说明。The following is an example of adjacent frequency interference as an example.
请参见图6，基于前述自适应滤波装置，本实施例中，干扰比获取单元61包括信号处理模块611和干扰比计算模块612。Referring to FIG. 6, based on the foregoing adaptive filtering device, in this embodiment, the interference ratio obtaining unit 61 includes a signal processing module 611 and an interference ratio calculating module 612.
信号处理模块611设置为从所述宽带数字信号中截取至少一段作为样本宽带数字信号。应当理解的是截取的数量可以根据具体应用场景(例如对精度的要求以及对滤波处理实时性的要求等因素)具体灵活选择，可以在宽带数字信号周内期截取预设长度的一段作为样本宽带数字信号，只要所截取的样本宽带数字信号能有效表征该宽带数字信号的干扰情况即可；也可在带宽数字信号周期内截取两段或三段以上作为样本宽带数字信号，以更精确的表征宽带数字信号的干扰情况，为后续干扰模式的设置提供更好的依据；也可以直接截取整个周期的宽带数字信号作为样本带宽数字信号，以便准确的表征干扰情况。The signal processing module 611 is configured to intercept at least one segment from the wideband digital signal as a sample wideband digital signal. It should be understood that the number of interceptions can be flexibly selected according to specific application scenarios (such as requirements for accuracy and real-time requirements for filtering processing), and a segment of a preset length can be intercepted as a sample bandwidth during the period of the wideband digital signal. Digital signal, as long as the sampled wideband digital signal intercepted can effectively characterize the interference of the wideband digital signal; or two or more segments of the wideband digital signal can be intercepted as a sample wideband digital signal for more accurate characterization The interference condition of the wideband digital signal provides a better basis for the setting of the subsequent interference mode; the wideband digital signal of the entire period can also be directly intercepted as the sample bandwidth digital signal, so as to accurately characterize the interference situation.
所述干扰比计算模块612设置为提取所述样本宽带数字信号的带内信号和干扰信号，计算所述带内信号的功率和所述干扰信号的功率，将所述带内信号的功率与所述干扰信号的功率的比值作为干扰比。The interference ratio calculation module 612 is configured to extract an in-band signal and an interference signal of the sample wideband digital signal, calculate a power of the in-band signal and a power of the interference signal, and compare the power of the in-band signal with the The ratio of the power of the interference signal is used as the interference ratio.
可选地，所述干扰比计算模块612包括邻频干扰比计算子模块6121，所述干扰比包括邻频干扰比；所述邻频干扰比计算子模块6121设置为提取所述样本宽带数字信号的带内信号和邻频干扰信号，计算所述带内信号的功率和所述邻频干扰信号的功率，将所述带内信号的功率与所述邻频干扰信号的功率的比值作为邻频干扰比。 Optionally, the interference ratio calculation module 612 includes an adjacent interference ratio calculation submodule 6121, the interference ratio includes an adjacent frequency interference ratio, and the adjacent frequency interference ratio calculation submodule 6121 is configured to extract the sample wideband digital signal. In-band signal and adjacent-frequency interference signal, calculating a power of the in-band signal and a power of the adjacent-frequency interference signal, and using a ratio of a power of the in-band signal to a power of the adjacent-frequency interference signal as an adjacent frequency Interference ratio.
可选地，所述邻频干扰比计算子模块6121包括第一低通滤波器，设置为提取所述样本宽带数字信号的带内信号，所述邻频干扰比计算子模块6121还包括第二低通滤波器(或第一带通滤波器)，设置为提取所述样本宽带数字信号中频谱右移后的左邻频干扰信号，所述邻频干扰比计算子模块6121包括第三低通滤波器(或第二带通滤波器)，设置为提取所述样本宽带数字信号中频谱左移后的右邻频干扰信号。Optionally, the adjacent-frequency interference ratio calculation sub-module 6121 includes a first low-pass filter configured to extract an in-band signal of the sample wideband digital signal, and the adjacent-frequency interference ratio calculation sub-module 6121 further includes a second a low pass filter (or first band pass filter) configured to extract a left adjacent frequency interference signal after the spectrum is shifted right in the sample wideband digital signal, the adjacent frequency interference ratio calculation submodule 6121 including a third low pass A filter (or a second band pass filter) is arranged to extract a right adjacent frequency interference signal after the left shift of the spectrum in the sample wideband digital signal.
本实施例中的滤波模式设置单元62，包括邻频干扰滤波设置模块621，所述邻频干扰滤波设置单元621设置为在所述干扰比包括邻频干扰比时，将所述邻频干扰比与预设邻频干扰比阈值进行比较，根据比较结果确定滤波性能与该邻频干扰比匹配的邻频干扰信道滤波模式；The filtering mode setting unit 62 in this embodiment includes an adjacent frequency interference filtering setting module 621, and the adjacent frequency interference filtering setting unit 621 is configured to compare the adjacent frequency interference ratio when the interference ratio includes an adjacent frequency interference ratio. Comparing with the preset adjacent-channel interference ratio threshold, determining, according to the comparison result, the adjacent-frequency interference channel filtering mode in which the filtering performance matches the adjacent-frequency interference ratio;
本实施例中的邻频干扰比阈值设置的个数可以根据的需求灵活设置，例如可设置为一个，对干扰场景进行一个比较粗的划分，也可以设置为多个，以对干扰场景进行一个比较精确的细分。所述邻频干扰滤波设置子单元中所述预设邻频干扰比阈值与所述邻频干扰比做比较，根据比较结果确定滤波性能与该邻频干扰比匹配的信道滤波模式。The number of adjacent interferences in the present embodiment can be flexibly set according to the requirements of the threshold, for example, it can be set to one, and a relatively coarse division of the interference scene can be performed, or multiple settings can be performed to perform an interference scenario. More precise subdivision. The preset adjacent-channel interference ratio threshold in the adjacent-frequency interference filtering setting sub-unit is compared with the adjacent-frequency interference ratio, and the channel filtering mode in which the filtering performance matches the adjacent-frequency interference ratio is determined according to the comparison result.
本实例中的邻频干扰比阈值设有两个时，可以设置为有第一邻频干扰比阈值和第二邻频干扰比阈值，所述第二邻频干扰比阈值大于所述第一邻频干扰比阈值。In this example, when the adjacent channel interference ratio threshold is set to two, the first adjacent channel interference ratio threshold and the second adjacent channel interference ratio threshold may be set, and the second adjacent channel interference ratio threshold is greater than the first neighbor. Frequency interference ratio threshold.
当比较结果为所述邻频干扰比小于所述第一预设邻频干扰比阈值时，设置滤波性能为高带外抑制性能的信道滤波模式；当比较结果为所述邻频干扰比大于或等于所述第一预设邻频干扰比阈值时，小于或等于所述第二预设邻频干扰比阈值时，设置滤波性能为中通带性能中带外抑制性能的信道滤波模式；当比较结果为所述邻频干扰比大于所述第二预设邻频干扰比阈值时，设置滤波性能为高通带性能的信道滤波模式。When the comparison result is that the adjacent-channel interference ratio is smaller than the first preset adjacent-channel interference ratio threshold, the channel filtering mode with the filtering performance being high out-of-band rejection performance is set; when the comparison result is that the adjacent-frequency interference ratio is greater than or When the first preset adjacent channel interference ratio threshold is equal to or less than or equal to the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the outband suppression performance in the middle passband performance is set; As a result, when the adjacent-channel interference ratio is greater than the second preset adjacent-channel interference ratio threshold, the channel filtering mode in which the filtering performance is high-passband performance is set.
本实施例中的信道滤波单元63包括用于滤波的滤波器631，所述信道滤波单元63至少设置有一个滤波参数可调的滤波器631，或多个滤波参数不同的滤波器631。请参见图6，所述信道滤波单元23设置有一个滤波器系数可调的滤波器631，针对不同的滤波性能，相应地调整设置滤波参数，更好地 针对不同的宽带数字信号进行滤波。The channel filtering unit 63 in this embodiment includes a filter 631 for filtering, and the channel filtering unit 63 is provided with at least one filter 631 whose filter parameters are adjustable, or a plurality of filters 631 having different filter parameters. Referring to FIG. 6, the channel filtering unit 23 is provided with a filter 631 with adjustable filter coefficients, and the filter parameters are adjusted accordingly for different filtering performances. Filtering for different wideband digital signals.
本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机可执行指令，所述计算机可执行指令被执行时实现自适应滤波方法。The embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and the computer executable instructions are implemented to implement an adaptive filtering method.
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本申请不限制于任何特定形式的硬件和软件的结合。本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围，均应涵盖在本申请的权利要求范围当中。One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software. A person skilled in the art should understand that the technical solutions of the present application can be modified or equivalent, without departing from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.
工业实用性Industrial applicability
上述技术方案解决了固定信道滤波器在不同带内信号和邻频干扰场景下的性能折衷、滤波效果不佳的问题，使信号滤波效果更好。 The above technical solution solves the performance tradeoff of the fixed channel filter in different in-band signals and adjacent-band interference scenarios, and the filtering effect is not good, so that the signal filtering effect is better.

Claims (10)

  1. 一种自适应滤波方法，包括：An adaptive filtering method comprising:
    获取待进行滤波处理的宽带数字信号的干扰比；Obtaining an interference ratio of the wideband digital signal to be filtered;
    根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式；And setting a channel filtering mode in which the filtering performance matches the interference ratio according to the interference ratio;
    采用所述信道滤波模式对所述宽带数字信号进行信道滤波。The wideband digital signal is channel filtered using the channel filtering mode.
  2. 如权利要求1所述的自适应滤波方法，其中，获取所述待进行滤波处理的宽带数字信号的干扰比包括：The adaptive filtering method according to claim 1, wherein the obtaining an interference ratio of the wideband digital signal to be subjected to filtering processing comprises:
    从所述待进行滤波处理的宽带数字信号中截取至少一段作为样本宽带数字信号；Extracting at least one segment from the wideband digital signal to be subjected to filtering processing as a sample wideband digital signal;
    提取所述样本宽带数字信号的带内信号和干扰信号；Extracting an in-band signal and an interference signal of the sample wideband digital signal;
    计算所述带内信号的功率和所述干扰信号的功率，将所述带内信号的功率与所述干扰信号的功率的比值作为干扰比。Calculating a power of the in-band signal and a power of the interference signal, and using a ratio of a power of the in-band signal to a power of the interference signal as an interference ratio.
  3. 如权利要求2所述的自适应滤波方法，其中，所述干扰比包括邻频干扰比。The adaptive filtering method of claim 2, wherein the interference ratio comprises an adjacent frequency interference ratio.
  4. 如权利要求3所述的自适应滤波方法，其中，所述根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式包括：The adaptive filtering method according to claim 3, wherein said channel filtering mode that matches filtering performance according to said interference ratio and said interference ratio comprises:
    将所述邻频干扰比与预设邻频干扰比阈值进行比较，根据比较结果确定滤波性能与该邻频干扰比匹配的邻频干扰信道滤波模式。Comparing the adjacent-channel interference ratio with a preset adjacent-channel interference ratio threshold, and determining, according to the comparison result, an adjacent-channel interference channel filtering mode in which the filtering performance matches the adjacent-frequency interference ratio.
  5. 如权利要求4所述的自适应滤波方法，其中，所述预设邻频干扰比阈值包括第一预设邻频干扰比阈值和第二预设邻频干扰比阈值；The adaptive filtering method of claim 4, wherein the preset adjacent interference ratio threshold comprises a first preset adjacent interference ratio threshold and a second preset adjacent interference ratio threshold;
    所述根据比较结果确定滤波性能与该邻频干扰比匹配的信道滤波模式包括：The channel filtering mode that determines that the filtering performance matches the adjacent frequency interference ratio according to the comparison result includes:
    当所述邻频干扰比小于所述第一预设邻频干扰比阈值时，设置滤波性能为高带外抑制性能的信道滤波模式；When the adjacent-channel interference ratio is smaller than the first preset adjacent-channel interference ratio threshold, setting a channel filtering mode with a filtering performance of high out-of-band rejection performance;
    当所述邻频干扰比大于或等于所述第一预设邻频干扰比阈值，且小于或等于所述第二预设邻频干扰比阈值时，设置滤波性能为中通带性能中带外抑制性能的信道滤波模式； When the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold and less than or equal to the second preset adjacent-channel interference ratio threshold, setting the filtering performance to be out-of-band in the performance of the medium passband Channel filtering mode that suppresses performance;
    当所述邻频干扰比大于所述第二预设邻频干扰比阈值时，设置滤波性能为高通带性能的信道滤波模式。When the adjacent channel interference ratio is greater than the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the high pass band performance is set.
  6. 一种自适应滤波装置，包括：干扰比获取单元、滤波模式设置单元和信道滤波单元；An adaptive filtering device includes: an interference ratio acquiring unit, a filtering mode setting unit, and a channel filtering unit;
    所述干扰比获取单元设置为获取待进行滤波处理的宽带数字信号的干扰比；The interference ratio acquisition unit is configured to acquire an interference ratio of the wideband digital signal to be subjected to filtering processing;
    所述滤波模式设置单元设置为根据所述干扰比设置滤波性能与该干扰比匹配的信道滤波模式；The filtering mode setting unit is configured to set a channel filtering mode in which a filtering performance matches the interference ratio according to the interference ratio;
    所述信道滤波单元设置为采用所述信道滤波模式对所述宽带数字信号进行信道滤波。The channel filtering unit is configured to perform channel filtering on the wideband digital signal by using the channel filtering mode.
  7. 如权利要求6所述的自适应滤波的装置，其中，所述干扰比获取单元包括：信号处理模块和干扰比计算模块；The apparatus for adaptive filtering according to claim 6, wherein the interference ratio acquisition unit comprises: a signal processing module and an interference ratio calculation module;
    所述信号处理模块设置为从所述待进行滤波处理的宽带数字信号中截取至少一段作为样本宽带数字信号；The signal processing module is configured to intercept at least one segment as a sample wideband digital signal from the wideband digital signal to be subjected to filtering processing;
    所述干扰比计算模块设置为提取所述样本宽带数字信号的带内信号和干扰信号，计算所述带内信号的功率和所述干扰信号的功率，将所述带内信号的功率与所述干扰信号的功率的比值作为干扰比。The interference ratio calculation module is configured to extract an in-band signal and an interference signal of the sample wideband digital signal, calculate a power of the in-band signal and a power of the interference signal, and compare the power of the in-band signal with the The ratio of the power of the interference signal is taken as the interference ratio.
  8. 如权利要求7所述的自适应滤波的装置，其中，所述干扰比计算模块包括邻频干扰比计算子模块，所述干扰比包括邻频干扰比；所述邻频干扰比计算子模块设置为提取所述样本宽带数字信号的带内信号和邻频干扰信号，计算所述带内信号的功率和所述邻频干扰信号的功率，将所述带内信号的功率与所述邻频干扰信号的功率的比值作为邻频干扰比。The apparatus for adaptive filtering according to claim 7, wherein said interference ratio calculation module comprises an adjacent frequency interference ratio calculation submodule, said interference ratio comprises an adjacent frequency interference ratio; said adjacent frequency interference ratio calculation submodule setting To extract the in-band signal and the adjacent-frequency interference signal of the sample wideband digital signal, calculate the power of the in-band signal and the power of the adjacent-frequency interference signal, and compare the power of the in-band signal with the adjacent-channel interference. The ratio of the power of the signal is taken as the adjacent frequency interference ratio.
  9. 如权利要求8所述的自适应滤波装置，其中，所述滤波模式设置单元包括邻频干扰滤波设置模块，所述邻频干扰滤波设置模块设置为将所述邻频干扰比与预设邻频干扰比阈值进行比较，根据比较结果确定滤波性能与该邻频干扰比匹配的邻频干扰信道滤波模式。The adaptive filtering device according to claim 8, wherein the filtering mode setting unit comprises an adjacent frequency interference filtering setting module, and the adjacent frequency interference filtering setting module is configured to set the adjacent frequency interference ratio and a preset adjacent frequency. The interference is compared with the threshold, and the adjacent channel interference channel filtering mode whose filtering performance matches the adjacent channel interference ratio is determined according to the comparison result.
  10. 如权利要求9所述的自适应滤波装置，其中，所述预设邻频干扰比阈值包括第一预设邻频干扰比阈值和第二预设邻频干扰比阈值；所述邻频干 扰滤波设置模块通过如下方式实现根据比较结果确定滤波性能与该邻频干扰比匹配的信道滤波模式：The adaptive filtering device of claim 9, wherein the preset adjacent channel interference ratio threshold comprises a first preset adjacent channel interference ratio threshold and a second preset adjacent channel interference ratio threshold; The disturbance filtering setting module realizes a channel filtering mode that matches the filtering performance and the adjacent frequency interference ratio according to the comparison result by:
    当比较结果为所述邻频干扰比小于所述第一预设邻频干扰比阈值时，设置滤波性能为高带外抑制性能的信道滤波模式；When the comparison result is that the adjacent-channel interference ratio is smaller than the first preset adjacent-channel interference ratio threshold, the channel filtering mode with the filtering performance being high out-of-band rejection performance is set;
    当比较结果为所述邻频干扰比大于或等于所述第一预设邻频干扰比阈值，且小于或等于所述第二预设邻频干扰比阈值时，设置滤波性能为中通带性能中带外抑制性能的信道滤波模式；When the comparison result is that the adjacent-channel interference ratio is greater than or equal to the first preset adjacent-channel interference ratio threshold, and is less than or equal to the second preset adjacent-channel interference ratio threshold, setting a filtering performance to a medium passband performance Channel filtering mode with out-of-band rejection performance;
    当比较结果为所述邻频干扰比大于所述第二预设邻频干扰比阈值时，设置滤波性能为高通带性能的信道滤波模式。 When the comparison result is that the adjacent channel interference ratio is greater than the second preset adjacent channel interference ratio threshold, the channel filtering mode with the filtering performance being the high pass band performance is set.
PCT/CN2016/081167 2015-08-28 2016-05-05 Self-adaptive filtering method and apparatus WO2017036161A1 (en)

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