WO2019056689A1 - Method and device for in-band co-frequency self-interference cancellation, and computer-readable storage medium - Google Patents

Method and device for in-band co-frequency self-interference cancellation, and computer-readable storage medium Download PDF

Info

Publication number
WO2019056689A1
WO2019056689A1 PCT/CN2018/075273 CN2018075273W WO2019056689A1 WO 2019056689 A1 WO2019056689 A1 WO 2019056689A1 CN 2018075273 W CN2018075273 W CN 2018075273W WO 2019056689 A1 WO2019056689 A1 WO 2019056689A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
frequency
interference cancellation
band
frequency domain
Prior art date
Application number
PCT/CN2018/075273
Other languages
French (fr)
Chinese (zh)
Inventor
朱钧
尹华镜
尹超
Original Assignee
深圳思凯微电子有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 深圳思凯微电子有限公司 filed Critical 深圳思凯微电子有限公司
Publication of WO2019056689A1 publication Critical patent/WO2019056689A1/en

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
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving

Definitions

  • the present invention relates to the field of wireless broadcast technologies, and in particular, to an in-band co-frequency self-interference cancellation method and apparatus, and a computer readable storage medium.
  • Broadcast technology has always occupied an irreplaceable position in the field of communication with its unique advantages.
  • broadcasting technology especially the evolution of traditional analog broadcasting to digital broadcasting, broadcasting technology will be more and more concerned by various industries with its advantages of economy, high efficiency and wide coverage.
  • the main object of the present invention is to provide an in-band co-frequency self-interference cancellation method and apparatus, and a computer readable storage medium, which are directed to solving the problem that self-interference occurs when a plurality of broadcast signals are co-occurring in the same frequency band.
  • the present invention provides an in-band co-channel self-interference cancellation method, the method comprising the following steps:
  • the frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, wherein the superposed signal and the superimposed signal are baseband time domain signals;
  • the generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
  • the step of performing frequency domain response analysis on the superimposed signal and the superimposed signal to obtain a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal respectively includes:
  • sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.
  • the step of performing frequency domain response analysis on the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, including:
  • the calculating a power ratio of the frequency domain response of the overlapped signal to a frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal Steps including:
  • the step of performing predistortion processing on the frequency domain response of the overlapped signal in the overlapping region according to the frequency domain response of the overlap signal to generate a newly added signal comprises:
  • the step of performing the time domain transform on the frequency domain response of the newly added signal to generate the new added signal further includes:
  • the present invention further provides an in-band intra-frequency self-interference cancellation apparatus, including: a memory, a processor, and a memory stored in the memory and in the An in-band intra-frequency self-interference cancellation program running on the processor, the in-band intra-frequency self-interference cancellation program being implemented by the processor to implement the steps of the in-band intra-frequency self-interference cancellation method as described above.
  • the present invention further provides a computer readable storage medium, wherein the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, the in-band co-channel self-interference The step of implementing the in-band co-frequency self-interference cancellation method as described above when the program is executed by the processor.
  • An in-band co-frequency self-interference cancellation method and apparatus and a computer readable storage medium divide two or more broadcast signals having overlapping regions in a frequency band into a stack by an in-band intra-frequency wireless broadcast exciter Two types of signals and stacked signals. After frequency domain analysis and predistortion processing, multiple signals are coupled into a new transmitted signal through the baseband, and the frequency domain components of the added signal are completely retained, and the frequency of the stacked signals is completely preserved. The impact received by the domain component reaches a relatively low level, thereby solving the problem of self-interference generated when multiple broadcast signals are co-occurring in the same frequency band, and improving the transmission quality of the broadcast signal.
  • FIG. 1 is a schematic structural diagram of a terminal in an operating environment of a device according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a first embodiment of an in-band co-frequency self-interference cancellation method according to the present invention
  • FIG. 3 is a schematic flow chart of a second embodiment of a method for canceling in-band self-interference in a band according to the present invention
  • FIG. 4 is a schematic flow chart of a second embodiment of an in-band intra-frequency self-interference cancellation method according to the present invention.
  • FIG. 5 is a schematic diagram of frequency domain response of an over-stacked signal and an over-stacked signal in an in-band intra-frequency self-interference cancellation method according to the present invention
  • FIG. 6 is a schematic diagram of a signal processing flow of an in-band intra-frequency self-interference cancellation method according to the present invention.
  • the main solution of the embodiment of the present invention is: performing frequency domain response analysis on the superimposed signal and the superimposed signal, respectively obtaining a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal; wherein the superimposed signal, the The superimposed signals are baseband time domain signals; the frequency domain overlap region of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal is identified; according to the frequency domain response of the superimposed signal, the pair is located at the frequency The frequency domain response of the overlapped signal of the domain overlap region is predistorted to generate a new add signal; the generated new add signal is coupled with the superimposed signal to generate a new baseband signal.
  • the present invention provides a solution aimed at solving the above problems.
  • the in-band co-frequency broadcast exciter couples two or more broadcast signals on the baseband and couples them to generate a new baseband signal. If there is a band overlap region, mutual interference will occur, which will seriously degrade the signal quality.
  • the invention provides a baseband signal predistortion processing method applied to an in-band co-frequency broadcast exciter, which can eliminate an overlaid signal (such as an FM broadcast signal) and an overlapped signal such as OFDM (Orthogonal Frequency Division Multiplexing). Frequency division multiplexing (OFDM) interference of digital broadcast signals, while also reducing the interference of the stacked signals (such as OFDM digital broadcast signals) on the received signals (such as FM broadcast signals).
  • the invention has the following characteristics:
  • the frequency domain response of the superimposed signal is well protected, and the interference received by the superimposed signal is not eliminated, but the other frequency domain response components of the superimposed signal can be guaranteed to be destroyed as much as possible;
  • the in-band co-frequency radio broadcast exciter can operate under a lower signal power ratio parameter, thereby improving the reception effect of the received signal receiver.
  • FIG. 1 is a schematic structural diagram of a terminal in an operating environment of a device according to an embodiment of the present invention.
  • the terminal may include a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002.
  • the communication bus 1002 is used to implement connection communication between these components.
  • the user interface 1003 can include a display, an input unit such as a keyboard, and the optional user interface 1003 can also include a standard wired interface, a wireless interface.
  • the network interface 1004 can optionally include a standard wired interface, a wireless interface (such as a WI-FI interface).
  • the memory 1005 may be a high speed RAM memory or a non-volatile memory such as a disk memory.
  • the memory 1005 can also optionally be a storage device independent of the aforementioned processor 1001.
  • terminal structure shown in FIG. 1 does not constitute a limitation to the terminal, and may include more or less components than those illustrated, or a combination of certain components, or different component arrangements.
  • a memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an in-band intra-frequency self-interference cancellation program.
  • the network interface 1004 is mainly used to connect to the background server and perform data communication with the background server;
  • the user interface 1003 is mainly used to connect the client (user end), and perform data communication with the client;
  • the processor 1001 can be used to call the in-band intra-frequency self-interference cancellation program stored in the memory 1005 and perform the following operations:
  • the frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, wherein the superposed signal and the superimposed signal are baseband time domain signals;
  • the generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
  • processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
  • sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.
  • processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
  • processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
  • processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
  • processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
  • a first embodiment of the present invention provides an in-band intra-frequency self-interference cancellation method, where the method includes the following steps:
  • Step S10 performing frequency domain response analysis on the superimposed signal and the superimposed signal, respectively obtaining frequency domain response of the superimposed signal and frequency domain response of the superimposed signal; wherein, the superimposed signal and the superimposed signal are baseband Domain signal
  • Step S20 identifying a frequency domain overlap region of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal;
  • Step S30 performing predistortion processing on the frequency domain response of the overlapped signal located in the overlapping region of the frequency domain according to the frequency domain response of the overlapped signal to generate a newly added signal;
  • Embodiments of the present invention define two concepts of "received signal” and "added signal”.
  • the “additional signal” is a digital broadcast signal (such as a digital broadcast signal of an OFDM system) in which a bandwidth is relatively small or a spectral resolution is low in a broadcast signal in the same frequency band, and a “banded signal” has a relatively large bandwidth, which may be Analog broadcast signals or digital broadcast signals with high spectral resolution.
  • the frequency at which the superimposed signal is actually affected is only The frequency of the overlapped signal is in this interval, while the frequency domain response at other locations is unaffected. Therefore, by performing frequency domain analysis and predistortion processing on the in-band intra-frequency wireless broadcast signal, after the signal of the overlapping region of the band is coupled to generate a new transmitted signal, the frequency domain component of the added signal is completely retained, so that the signal is superimposed. The frequency domain response is well protected; at the same time, although the interference received by the superimposed signal is not eliminated, it is possible to ensure that the other frequency domain response components of the superimposed signal are not destroyed.
  • the received signal is a baseband time domain signal directly generated by a corresponding broadcast system (such as an FM analog broadcast system). Since the spectral resolution of the superimposed signal, especially the analog signal, is high, it means that the frequency band response region is less affected by the frequency domain response of the superimposed signal. Therefore, before performing the frequency domain response analysis, the received signal is sampled higher than the preset multiple of the stacked signal; then the fast Fourier transform is performed on the high-sampling received signal to obtain the high-resolution frequency of the received signal. The domain response, at the same time, calculates the frequency domain response power ratio of the superimposed signal and the superimposed signal, and normalizes the frequency domain response of the superimposed signal to obtain a normalized frequency domain response of the superimposed signal. It should be noted that the size of the spectral resolution that can be reserved is determined by the capability of the exciter. The higher the spectral resolution that can be supported, the stronger the performance improvement capability.
  • the frequency domain response of the baseband time domain signal maintains the frequency domain response of the overlay signal that is expected to be the original.
  • the predistortion processing is performed according to a desired frequency domain response of the superimposed signal, and the specific steps include: calculating a difference between a frequency domain response of the desired superimposed signal and a frequency domain response of the superimposed signal; and being located at the overlapping area
  • the frequency domain response of the added signal is replaced by the difference and a new frequency domain response is formed; the new frequency domain response is time domain transformed to generate a newly added baseband signal.
  • Step S40 coupling the generated new overlap signal with the superimposed signal to generate a new baseband signal.
  • the new baseband signal after coupling preserves the frequency domain response of the desired overlap signal at the frequency of the overlap region, so that the reception performance of the add-on signal is greatly improved. Since the spectral resolution of the superimposed signal is higher than that of the superimposed signal, the frequency domain response of the superimposed signal with less frequency points in the overlapping region of the frequency band is affected, thereby realizing self-interference cancellation of the in-band same-frequency broadcast signal. And weakened.
  • a second embodiment of the present invention provides an in-band intra-frequency self-interference cancellation method.
  • the frequency domain response analysis of the received signal is obtained and added.
  • the method includes:
  • Step S50 sampling the superimposed signal and the superimposed signal; wherein, the sampling rate of the superimposed signal is a sampling rate of the overlapped signal of a preset multiple.
  • FIG. 6 is a schematic diagram of a signal processing flow of an in-band intra-frequency self-interference cancellation method according to the present invention.
  • the sampling rate is M times the sampling rate of the stacked signal, so that the interference of the stacked signal in the frequency domain is limited to a few positions.
  • the sampling frequency of the known overlap signal is fs
  • N fft is the number of points calculated by the FFT transform
  • the sampling frequency of the superimposed signal is M*f s
  • M is a positive integer.
  • the step of performing a frequency domain response analysis on the received signal to obtain a frequency domain response of the received signal corresponding to the added signal includes:
  • Step S11 transforming the sampled received signal according to a preset transform algorithm to obtain a frequency domain response of the high resolution received signal
  • the (M*N fft ) point transformation is continued to obtain a high-resolution transform frequency domain response; wherein the preset transform algorithm is preferably a FFT algorithm (Fast Fourier Transformation) Liye transform algorithm).
  • the preset transform algorithm is preferably a FFT algorithm (Fast Fourier Transformation) Liye transform algorithm).
  • Step S12 calculating a power ratio of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal.
  • the method includes: calculating, according to a corresponding positional relationship between the frequency domain response of the received signal and the carrier position of the added signal, a power ratio of a frequency domain response of the corresponding position of the received signal; and frequency domain response of each corresponding position Dividing separately from the corresponding power ratio and performing power normalization to obtain a normalized frequency domain response of the received signal.
  • the frequency domain response with the sequence number M*m corresponds to the frequency domain response of the superimposed signal in the spectrum; wherein m ⁇ P, P is the initial sampling rate of the superimposed signal.
  • Corresponding carrier position Calculate the power ratio P r (m) of the frequency domain response of the superimposed signal corresponding to each sequence number, and divide the frequency domain response at the corresponding position of the superimposed signal by P r (m) to normalize the power to obtain normalization. After the frequency domain response.
  • the subsequent superimposed signals are less coupled when the superimposed signal and the superimposed signal are coupled.
  • the frequency domain response is disturbed.
  • a third embodiment of the present invention provides an in-band intra-frequency self-interference cancellation method.
  • the calculating the frequency domain response of the received signal and the corresponding position And adding a power ratio of the frequency domain response of the superimposed signal and performing power normalization to obtain a normalized frequency domain response of the superimposed signal, including:
  • Step S31 calculating a power ratio of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal according to a position correspondence relationship between the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal;
  • Step S32 dividing the frequency domain response of the overlapped signal by a corresponding power ratio, and performing power normalization to obtain a normalized frequency domain response of the received signal;
  • the frequency domain response of the superimposed signal has the same frequency domain scale characteristics as the superimposed signal after the inverse fast Fourier transform (Fast Fourier Transform).
  • the coupling formula of two time-domain baseband signals can be expressed as:
  • the frequency domain response of the above two signals X 1 (k) and X 2 (k) after superposition should be X 2 (k), then the frequency of the actual transmission of the superimposed signal is added.
  • the domain response becomes [X 2 (k)-X 1 (k)].
  • the principle of predistortion is to replace the expected frequency domain response X 2 (k) of the superimposed signal with the expected frequency domain response X 2 (k) of the superimposed signal and the frequency domain response of the superimposed signal X 1 (k The difference.
  • the signal after coupling retains the frequency domain response of the superimposed signal at the overlapping frequency points, so that the receiving performance of the superimposed signal is greatly improved.
  • the method further includes:
  • Step S33 determining target power of the frequency domain overlap region after signal coupling, and acquiring an average power of the overlapped signal, a frequency ratio of the frequency domain response of the overlapped signal and a frequency domain response of the overlapped signal corresponding to the corresponding position;
  • Step S34 obtaining a power coefficient of the frequency domain response of the overlapped signal after the predistortion processing according to the target power, the average power of the overlapped signal, and the power ratio;
  • Step S35 multiplying the frequency domain response of the superimposed signal by the predistortion processing and multiplying the power coefficient to obtain a frequency domain response of the newly added signal.
  • the power of the baseband signal coupled to each frequency domain response point can be expressed as [1+P r (m)]*A, and A is plus The average power of the stacked signal; for the OFDM-based digital broadcast signal, the value of A is a fixed value, and the average power in the band is relatively stable; when the received signal is an analog broadcast signal, there may be an ups and downs, which is determined according to the actual situation.
  • the frequency domain response [X 2 (k)-X 1 (k)] of the coupled signal should be multiplied by the power coefficient P T / ⁇ [1+P r (m) ]*A ⁇ , so that the frequency domain response power of the band overlap region after coupling is kept stable.
  • Step S36 performing time domain transformation on the frequency domain response of the newly added signal to generate the newly added signal.
  • the intra-band co-channel self-interference cancellation method provided by the embodiment of the present invention
  • the spectral resolution of the received signal is higher than the newly added signal, in the overlapping region of the band of the received signal and the newly added signal, only There will be fewer frequency points in the frequency domain response.
  • the influence of co-channel interference can be reasonably weakened.
  • an embodiment of the present invention further provides a computer readable storage medium, where the in-band intra-frequency self-interference cancellation program is stored, and the in-band intra-frequency self-interference cancellation program is executed by a processor.
  • the generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
  • sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transmitters (AREA)
  • Noise Elimination (AREA)

Abstract

Disclosed is a method for in-band co-frequency self-interference cancellation. The method comprises the following steps: performing frequency response analysis with respect to a superimposed signal and a superimposing signal to produce respectively a superimposed signal frequency-domain response and a superimposed signal frequency-domain response, where both the superimposed signal and the superimposing signal are baseband time-domain signals; identifying a frequency-domain overlap area of the superimposed signal frequency-domain response and the superimposing signal frequency-domain response; performing, on the basis of the superimposing signal frequency-domain response, predistortion processing with respect to a frequency domain of the superimposing signal located in the frequency-domain overlap area so as to generate a new superimposing signal; and, coupling and superimposing the superimposed signal with the newly generated superimposing signal to generate a new baseband signal. Also disclosed are a device for in-band co-frequency self-interference cancellation and a computer-readable storage medium. The present invention solves the problem of self-interference produced when multiple broadcast signals are co-generated and simultaneously broadcasted in a same frequency band, thus improving the transmission quality of the broadcast signals.

Description

带内同频自干扰消除方法、装置及计算机可读存储介质In-band co-frequency self-interference cancellation method, device and computer readable storage medium 技术领域Technical field
本发明涉及无线广播技术领域，尤其涉及带内同频自干扰消除方法、装置及计算机可读存储介质。The present invention relates to the field of wireless broadcast technologies, and in particular, to an in-band co-frequency self-interference cancellation method and apparatus, and a computer readable storage medium.
背景技术Background technique
广播技术以其特有的优点一直在通信领域占据着不可替代的地位。随着广播技术的发展，特别是传统模拟广播逐渐向数字化广播的演进，广播技术以其经济、高效、覆盖范围广的优势，将越来越多地受到各类行业的关注。Broadcast technology has always occupied an irreplaceable position in the field of communication with its unique advantages. With the development of broadcasting technology, especially the evolution of traditional analog broadcasting to digital broadcasting, broadcasting technology will be more and more concerned by various industries with its advantages of economy, high efficiency and wide coverage.
频率资源问题是广播技术发展过程中不可回避的重要难题。一方面中国调频频段数字音频广播标准(CDR)出于多方考虑，采用了数模同频段共生同播的方式；另一方面在北斗地基增强差分数据播发领域取得巨大突破的CDRadio技术，也把带内数模同播作为其系统的技术方案。换言之，在今后一段时间内，广播通信领域将面临模拟广播信号和数字广播信号共存的局面。数字广播技术由于其技术标准限定严格，一般不同的数字信号间不会出现频带区域交叠的情况。而FM模拟信号在实际环境中，由于各种原因可能导致其频带出现扩展，若此时附近存在其他信号，将不可避免产生同频干扰，影响各自的接收性能。而不仅限于FM模拟广播信号和CDR/CDRadio数字广播信号，在带内同频无线广播技术领域，这种情况在其他多个广播信号同时存在时也会出现。The problem of frequency resources is an important problem that cannot be avoided in the development of broadcasting technology. On the one hand, China's FM band digital audio broadcasting standard (CDR) adopts the method of multi-mode and the same frequency band symbiosis and simulcast; on the other hand, the CDRadio technology that has made great breakthroughs in the field of Beidou ground enhanced differential data broadcasting also takes Internal digital analog simulcasting is the technical solution of its system. In other words, in the future, the field of broadcasting and communication will face the situation where analog broadcast signals and digital broadcast signals coexist. Due to the strict technical standards of digital broadcasting technology, there is usually no overlap of frequency bands between different digital signals. In the actual environment, the FM analog signal may cause its frequency band to expand due to various reasons. If there are other signals in the vicinity, co-channel interference will inevitably occur, affecting the respective receiving performance. Rather than being limited to FM analog broadcast signals and CDR/CDRadio digital broadcast signals, in the field of in-band co-frequency radio broadcast technology, this situation also occurs when other multiple broadcast signals are present at the same time.
上述内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。The above content is only used to assist in understanding the technical solutions of the present invention, and does not constitute an admission that the above is prior art.
发明内容Summary of the invention
本发明的主要目的在于提供一种带内同频自干扰消除方法、装置及计算机可读存储介质，旨在解决多个广播信号同频段共生同播时产生自干扰的问题。The main object of the present invention is to provide an in-band co-frequency self-interference cancellation method and apparatus, and a computer readable storage medium, which are directed to solving the problem that self-interference occurs when a plurality of broadcast signals are co-occurring in the same frequency band.
为实现上述目的，本发明提供一种带内同频自干扰消除方法，所述方法包括以下步骤：To achieve the above object, the present invention provides an in-band co-channel self-interference cancellation method, the method comprising the following steps:
对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应；其中，所述受叠信号、所述加叠信号均为基带时域信号；The frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, wherein the superposed signal and the superimposed signal are baseband time domain signals;
识别所述受叠信号频域响应与所述加叠信号频域响应的频域交叠区域；Identifying a frequency domain overlap region of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal;
根据所述加叠信号频域响应，对位于所述频域交叠区域的所述加叠信号的频域响应进行预畸变处理，以生成新加叠信号；And performing predistortion processing on the frequency domain response of the overlapped signal located in the overlapping region of the frequency domain to generate a newly added signal according to the frequency domain response of the overlap signal;
将生成的所述新加叠信号与所述受叠信号进行耦合叠加，生成新基带信号。The generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
优选地，所述对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应的步骤之前，包括：Preferably, the step of performing frequency domain response analysis on the superimposed signal and the superimposed signal to obtain a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal respectively includes:
对所述受叠信号、所述加叠信号进行采样；其中，所述受叠信号的采样率为预设倍数的所述加叠信号的采样率。And sampling the superimposed signal and the superimposed signal; wherein, the sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.
优选地，所述对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应的步骤，包括：Preferably, the step of performing frequency domain response analysis on the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, including:
根据预设变换算法，对已采样的所述受叠信号进行变换，得到高分辨率受叠信号频域响应；Performing, according to a preset transform algorithm, transforming the sampled received signal to obtain a frequency domain response of the high resolution received signal;
计算所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应。Calculating a power ratio of the frequency domain response of the overlapped signal to a frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal.
优选地，所述计算所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应的步骤，包括：Preferably, the calculating a power ratio of the frequency domain response of the overlapped signal to a frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal Steps, including:
根据所述受叠信号频域响应与所述加叠信号频域响应的位置对应关系，计算所述受叠信号频域响应与所述加叠信号频域响应的功率比；Calculating, according to a position correspondence relationship between the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal, calculating a power ratio of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal;
将所述受叠信号频域响应分别与对应的功率比相除，并进行功率归一化，得到归一化后的受叠信号频域响应。Dividing the frequency domain response of the overlapped signal with a corresponding power ratio and performing power normalization to obtain a normalized frequency domain response of the received signal.
优选地，所述根据所述加叠信号频域响应，对位于所述交叠区域的所述加叠信号频域响应进行预畸变处理，以生成新加叠信号的步骤包括：Preferably, the step of performing predistortion processing on the frequency domain response of the overlapped signal in the overlapping region according to the frequency domain response of the overlap signal to generate a newly added signal comprises:
计算所述加叠信号频域响应与所述受叠信号频域响应的差值；Calculating a difference between a frequency domain response of the added signal and a frequency domain response of the received signal;
将位于所述交叠区域的所述加叠信号频域响应替换为所述差值，以形成新加叠信号频域响应；Substituting the overlapped signal frequency domain response at the overlap region with the difference to form a newly added signal frequency domain response;
对所述新加叠信号频域响应进行时域变换，生成所述新加叠信号。Performing a time domain transform on the frequency domain response of the newly added signal to generate the newly added signal.
优选地，所述对所述新加叠信号频域响应进行时域变换，生成所述新加叠信号的步骤之前，还包括：Preferably, the step of performing the time domain transform on the frequency domain response of the newly added signal to generate the new added signal further includes:
确定信号耦合后所述频域交叠区域的目标功率，并获取加叠信号平均功率、所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比；Determining a target power of the frequency domain overlap region after signal coupling, and acquiring an average power of the overlapped signal, a frequency ratio of the frequency domain response of the overlapped signal, and a frequency ratio of the frequency domain response of the overlapped signal at a corresponding position;
根据所述目标功率、所述加叠信号平均功率及所述功率比，得到预畸变处理后的所述加叠信号频域响应的功率系数；Obtaining a power coefficient of the frequency domain response of the added signal after the predistortion processing according to the target power, the average power of the added signal, and the power ratio;
将预畸变处理后的所述加叠信号频域响应与所述功率系数相乘，得到所述新加叠信号频域响应。And multiplying the frequency-domain response of the pre-distortion processing with the power coefficient to obtain a frequency domain response of the newly added signal.
此外，为实现上述目的，本发明还提供一种带内同频自干扰消除装置，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰消除程序被所述处理器执行时实现如上所述的带内同频自干扰消除方法的步骤。In addition, in order to achieve the above object, the present invention further provides an in-band intra-frequency self-interference cancellation apparatus, including: a memory, a processor, and a memory stored in the memory and in the An in-band intra-frequency self-interference cancellation program running on the processor, the in-band intra-frequency self-interference cancellation program being implemented by the processor to implement the steps of the in-band intra-frequency self-interference cancellation method as described above.
此外，为实现上述目的，本发明还提供一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如上所述的带内同频自干扰消除方法的步骤。In addition, in order to achieve the above object, the present invention further provides a computer readable storage medium, wherein the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, the in-band co-channel self-interference The step of implementing the in-band co-frequency self-interference cancellation method as described above when the program is executed by the processor.
本发明实施例提出的一种带内同频自干扰消除方法、装置及计算 机可读存储介质，通过带内同频无线广播激励器将频带存在重叠区域的两个或多个广播信号分成受叠信号和加叠信号两种类型，经过频域分析和预畸变化处理后使得多个信号经基带耦合成新的发射信号后，加叠信号的频域分量被完全保留，而受叠信号的频域分量收到的影响达到相对最低，从而解决多个广播信号同频段共生同播时产生自干扰的问题，改善广播信号的传输质量。An in-band co-frequency self-interference cancellation method and apparatus and a computer readable storage medium according to embodiments of the present invention divide two or more broadcast signals having overlapping regions in a frequency band into a stack by an in-band intra-frequency wireless broadcast exciter Two types of signals and stacked signals. After frequency domain analysis and predistortion processing, multiple signals are coupled into a new transmitted signal through the baseband, and the frequency domain components of the added signal are completely retained, and the frequency of the stacked signals is completely preserved. The impact received by the domain component reaches a relatively low level, thereby solving the problem of self-interference generated when multiple broadcast signals are co-occurring in the same frequency band, and improving the transmission quality of the broadcast signal.
附图说明DRAWINGS
图1是本发明实施例方案涉及的装置运行环境的终端结构示意图；1 is a schematic structural diagram of a terminal in an operating environment of a device according to an embodiment of the present invention;
图2为本发明带内同频自干扰消除方法第一实施例的流程示意图；2 is a schematic flow chart of a first embodiment of an in-band co-frequency self-interference cancellation method according to the present invention;
图3为本发明带内同频自干扰消除方法第二实施例的流程示意图；3 is a schematic flow chart of a second embodiment of a method for canceling in-band self-interference in a band according to the present invention;
图4为本发明带内同频自干扰消除方法第二实施例的流程示意图；4 is a schematic flow chart of a second embodiment of an in-band intra-frequency self-interference cancellation method according to the present invention;
图5为本发明带内同频自干扰消除方法中的受叠信号和加叠信号频域响应示意图；5 is a schematic diagram of frequency domain response of an over-stacked signal and an over-stacked signal in an in-band intra-frequency self-interference cancellation method according to the present invention;
图6为本发明带内同频自干扰消除方法的信号处理流程示意图。FIG. 6 is a schematic diagram of a signal processing flow of an in-band intra-frequency self-interference cancellation method according to the present invention.
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.
具体实施方式Detailed ways
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
本发明实施例的主要解决方案是：对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应；其中，所述受叠信号、所述加叠信号均为基带时域信号；识别所述受叠信号频域响应与所述加叠信号频域响应的频域交叠区域；根据所述加叠信 号频域响应，对位于所述频域交叠区域的所述加叠信号的频域响应进行预畸变处理，以生成新加叠信号；将生成的所述新加叠信号与所述受叠信号进行耦合叠加，生成新基带信号。The main solution of the embodiment of the present invention is: performing frequency domain response analysis on the superimposed signal and the superimposed signal, respectively obtaining a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal; wherein the superimposed signal, the The superimposed signals are baseband time domain signals; the frequency domain overlap region of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal is identified; according to the frequency domain response of the superimposed signal, the pair is located at the frequency The frequency domain response of the overlapped signal of the domain overlap region is predistorted to generate a new add signal; the generated new add signal is coupled with the superimposed signal to generate a new baseband signal.
由于现有多个广播信号同频段共生同播时会产生自干扰的问题，本发明提供一种解决方案，旨在解决上述问题。Since the existing multiple broadcast signals generate self-interference when co-occurring with the frequency band, the present invention provides a solution aimed at solving the above problems.
带内同频广播激励器会将两路或多路广播信号在基带上进行耦合，经耦合后生成新的基带信号，如果存在频带重叠区域，会产生互相干扰，将使得信号的质量严重下降。本发明所提出了一种应用于带内同频广播激励器的基带信号预畸变处理方法，可以消除受叠信号(如FM广播信号)对加叠信号如OFDM(Orthogonal Frequency Division Multiplexing，即正交频分复用技术)数字广播信号的干扰，同时也可以一定程度上减少加叠信号(如OFDM数字广播信号)对受叠信号(如FM广播信号)的干扰。本发明具有以下特点：The in-band co-frequency broadcast exciter couples two or more broadcast signals on the baseband and couples them to generate a new baseband signal. If there is a band overlap region, mutual interference will occur, which will seriously degrade the signal quality. The invention provides a baseband signal predistortion processing method applied to an in-band co-frequency broadcast exciter, which can eliminate an overlaid signal (such as an FM broadcast signal) and an overlapped signal such as OFDM (Orthogonal Frequency Division Multiplexing). Frequency division multiplexing (OFDM) interference of digital broadcast signals, while also reducing the interference of the stacked signals (such as OFDM digital broadcast signals) on the received signals (such as FM broadcast signals). The invention has the following characteristics:
通过对带内同频无线广播信号进行频域分析和预畸变处理，实现存在频带交叠区域的信号之间的耦合；By performing frequency domain analysis and predistortion processing on the in-band intra-frequency wireless broadcast signal, coupling between signals having overlapping regions of the frequency band is realized;
加叠信号的频域响应得到很好的保护，受叠信号受到的干扰不会消除，但是可以最大限度上保证受叠信号的其它频域响应分量不被破坏；The frequency domain response of the superimposed signal is well protected, and the interference received by the superimposed signal is not eliminated, but the other frequency domain response components of the superimposed signal can be guaranteed to be destroyed as much as possible;
使得加叠信号接收机获得更好的接收效果，带内同频无线广播激励器可以工作在更低的信号功率比参数下，从而也改善受叠信号接收机的接收效果。In order to obtain a better reception effect, the in-band co-frequency radio broadcast exciter can operate under a lower signal power ratio parameter, thereby improving the reception effect of the received signal receiver.
本发明实施例装置可以是一种激励器，具体可以是一种带内同频广播激励器。如图1所示，图1是本发明实施例方案涉及的装置运行环境的终端结构示意图。该终端可以包括：处理器1001，例如CPU，网络接口1004，用户接口1003，存储器1005，通信总线1002。其中，通信总线1002用于实现这些组件之间的连接通信。用户接口1003可以包括显示屏(Display)、输入单元比如键盘(Keyboard)，可选用户接口1003还可以包括标准的有线接口、无线接口。网络接口1004可选的可以包括标准的有线接口、无线接口(如WI-FI接口)。存储器1005可以是高速RAM存储器，也可以是稳定的存储器(non-volatile  memory)，例如磁盘存储器。存储器1005可选的还可以是独立于前述处理器1001的存储装置。The device in the embodiment of the present invention may be an exciter, and specifically may be an in-band co-frequency broadcast exciter. As shown in FIG. 1, FIG. 1 is a schematic structural diagram of a terminal in an operating environment of a device according to an embodiment of the present invention. The terminal may include a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Among them, the communication bus 1002 is used to implement connection communication between these components. The user interface 1003 can include a display, an input unit such as a keyboard, and the optional user interface 1003 can also include a standard wired interface, a wireless interface. The network interface 1004 can optionally include a standard wired interface, a wireless interface (such as a WI-FI interface). The memory 1005 may be a high speed RAM memory or a non-volatile memory such as a disk memory. The memory 1005 can also optionally be a storage device independent of the aforementioned processor 1001.
本领域技术人员可以理解，图1中示出的终端结构并不构成对终端的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。It will be understood by those skilled in the art that the terminal structure shown in FIG. 1 does not constitute a limitation to the terminal, and may include more or less components than those illustrated, or a combination of certain components, or different component arrangements.
如图1所示，作为一种计算机存储介质的存储器1005中可以包括操作系统、网络通信模块、用户接口模块以及带内同频自干扰消除程序。As shown in FIG. 1, a memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an in-band intra-frequency self-interference cancellation program.
在图1所示的终端中，网络接口1004主要用于连接后台服务器，与后台服务器进行数据通信；用户接口1003主要用于连接客户端(用户端)，与客户端进行数据通信；而处理器1001可以用于调用存储器1005中存储的带内同频自干扰消除程序，并执行以下操作：In the terminal shown in FIG. 1, the network interface 1004 is mainly used to connect to the background server and perform data communication with the background server; the user interface 1003 is mainly used to connect the client (user end), and perform data communication with the client; and the processor 1001 can be used to call the in-band intra-frequency self-interference cancellation program stored in the memory 1005 and perform the following operations:
对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应；其中，所述受叠信号、所述加叠信号均为基带时域信号；The frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, wherein the superposed signal and the superimposed signal are baseband time domain signals;
识别所述受叠信号频域响应与所述加叠信号频域响应的频域交叠区域；Identifying a frequency domain overlap region of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal;
根据所述加叠信号频域响应，对位于所述频域交叠区域的所述加叠信号的频域响应进行预畸变处理，以生成新加叠信号；And performing predistortion processing on the frequency domain response of the overlapped signal located in the overlapping region of the frequency domain to generate a newly added signal according to the frequency domain response of the overlap signal;
将生成的所述新加叠信号与所述受叠信号进行耦合叠加，生成新基带信号。The generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
进一步地，处理器1001可以调用存储器1005中存储的带内同频自干扰消除程序，还执行以下操作：Further, the processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
对所述受叠信号、所述加叠信号进行采样；其中，所述受叠信号的采样率为预设倍数的所述加叠信号的采样率。And sampling the superimposed signal and the superimposed signal; wherein, the sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.
进一步地，处理器1001可以调用存储器1005中存储的带内同频自干扰消除程序，还执行以下操作：Further, the processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
根据预设变换算法，对已采样的所述受叠信号进行变换，得到高分辨率受叠信号频域响应；Performing, according to a preset transform algorithm, transforming the sampled received signal to obtain a frequency domain response of the high resolution received signal;
计算所述受叠信号频域响应与对应位置的所述加叠信号频域响 应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应。Calculating a power ratio of the frequency domain response of the overlapped signal to a frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal.
进一步地，处理器1001可以调用存储器1005中存储的带内同频自干扰消除程序，还执行以下操作：Further, the processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
根据所述受叠信号频域响应与所述加叠信号频域响应的位置对应关系，计算所述受叠信号频域响应与所述加叠信号频域响应的功率比；Calculating, according to a position correspondence relationship between the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal, calculating a power ratio of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal;
将所述受叠信号频域响应分别与对应的功率比相除，并进行功率归一化，得到归一化后的受叠信号频域响应。Dividing the frequency domain response of the overlapped signal with a corresponding power ratio and performing power normalization to obtain a normalized frequency domain response of the received signal.
进一步地，处理器1001可以调用存储器1005中存储的带内同频自干扰消除程序，还执行以下操作：Further, the processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
计算所述加叠信号频域响应与所述受叠信号频域响应的差值；Calculating a difference between a frequency domain response of the added signal and a frequency domain response of the received signal;
将位于所述交叠区域的所述加叠信号频域响应替换为所述差值，以形成新加叠信号频域响应；Substituting the overlapped signal frequency domain response at the overlap region with the difference to form a newly added signal frequency domain response;
对所述新加叠信号频域响应进行时域变换，生成所述新加叠信号。Performing a time domain transform on the frequency domain response of the newly added signal to generate the newly added signal.
进一步地，处理器1001可以调用存储器1005中存储的带内同频自干扰消除程序，还执行以下操作：Further, the processor 1001 can call the in-band intra-frequency self-interference cancellation program stored in the memory 1005, and also perform the following operations:
确定信号耦合后所述频域交叠区域的目标功率，并获取加叠信号平均功率、所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比；Determining a target power of the frequency domain overlap region after signal coupling, and acquiring an average power of the overlapped signal, a frequency ratio of the frequency domain response of the overlapped signal, and a frequency ratio of the frequency domain response of the overlapped signal at a corresponding position;
根据所述目标功率、所述加叠信号平均功率及所述功率比，得到预畸变处理后的所述加叠信号频域响应的功率系数；Obtaining a power coefficient of the frequency domain response of the added signal after the predistortion processing according to the target power, the average power of the added signal, and the power ratio;
将预畸变处理后的所述加叠信号频域响应与所述功率系数相乘，得到所述新加叠信号频域响应。And multiplying the frequency-domain response of the pre-distortion processing with the power coefficient to obtain a frequency domain response of the newly added signal.
参照图2，本发明第一实施例提供一种带内同频自干扰消除方法，所述方法包括以下步骤：Referring to FIG. 2, a first embodiment of the present invention provides an in-band intra-frequency self-interference cancellation method, where the method includes the following steps:
步骤S10，对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应；其中，所述受叠信号、所述加叠信号均为基带时域信号；Step S10, performing frequency domain response analysis on the superimposed signal and the superimposed signal, respectively obtaining frequency domain response of the superimposed signal and frequency domain response of the superimposed signal; wherein, the superimposed signal and the superimposed signal are baseband Domain signal
步骤S20，识别所述受叠信号频域响应与所述加叠信号频域响应的频域交叠区域；Step S20, identifying a frequency domain overlap region of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal;
步骤S30，根据所述加叠信号频域响应，对位于所述频域交叠区域的所述加叠信号的频域响应进行预畸变处理，以生成新加叠信号；Step S30, performing predistortion processing on the frequency domain response of the overlapped signal located in the overlapping region of the frequency domain according to the frequency domain response of the overlapped signal to generate a newly added signal;
本发明各实施例定义了“受叠信号”和“加叠信号”两个概念。其中“加叠信号”是同频带内广播信号中带宽相对较小或频谱分辨率较低的数字广播信号(如OFDM系统的数字广播信号)，“受叠信号”的带宽相对较大，可以是模拟广播信号或者频谱分辨率较高的数字广播信号。Embodiments of the present invention define two concepts of "received signal" and "added signal". The “additional signal” is a digital broadcast signal (such as a digital broadcast signal of an OFDM system) in which a bandwidth is relatively small or a spectral resolution is low in a broadcast signal in the same frequency band, and a “banded signal” has a relatively large bandwidth, which may be Analog broadcast signals or digital broadcast signals with high spectral resolution.
如图5所示，当受叠信号和加叠信号在频谱上存在频带交叠区域时，由于受叠信号的频谱分辨率高于加叠信号，实际上受叠信号受影响的频点仅为加叠信号在此区间内的频点位置，而其他位置上的频域响应则不受影响。因此通过对带内同频无线广播信号进行频域分析和预畸变处理，存在频带交叠区域的信号耦合生成新的发射信号后，加叠信号的频域分量被完全保留，以使加叠信号的频域响应得到很好的保护；同时，尽管受叠信号受到的干扰不会消除，但是可以最大限度上保证受叠信号的其它频域响应分量不被破坏。As shown in FIG. 5, when the overlapped signal and the superimposed signal have frequency band overlapping regions in the spectrum, since the spectral resolution of the superimposed signal is higher than the superimposed signal, the frequency at which the superimposed signal is actually affected is only The frequency of the overlapped signal is in this interval, while the frequency domain response at other locations is unaffected. Therefore, by performing frequency domain analysis and predistortion processing on the in-band intra-frequency wireless broadcast signal, after the signal of the overlapping region of the band is coupled to generate a new transmitted signal, the frequency domain component of the added signal is completely retained, so that the signal is superimposed. The frequency domain response is well protected; at the same time, although the interference received by the superimposed signal is not eliminated, it is possible to ensure that the other frequency domain response components of the superimposed signal are not destroyed.
在具体实施中，受叠信号为对应的广播系统(如FM模拟广播系统)直接生成的基带时域信号。由于受叠信号特别是模拟信号的频谱分辨率较高，意味着频带交叠区域内受加叠信号频域响应的影响小。因此，进行频域响应分析前，对受叠信号进行高于加叠信号预设倍数的采样；然后对已高倍采样的受叠信号进行快速傅里叶变换，得到受叠信号的高分辨率频域响应，同时计算出加叠信号与受叠信号的频域响应功率比，并将受叠信号频域响应进行归一化处理，得到归一化后的受叠信号频域响应。需要说明的是，能保留的频谱分辨率的大小由激励器的能力来决定，能够支持的频谱分辨率越高，则性能改善能力越强。In a specific implementation, the received signal is a baseband time domain signal directly generated by a corresponding broadcast system (such as an FM analog broadcast system). Since the spectral resolution of the superimposed signal, especially the analog signal, is high, it means that the frequency band response region is less affected by the frequency domain response of the superimposed signal. Therefore, before performing the frequency domain response analysis, the received signal is sampled higher than the preset multiple of the stacked signal; then the fast Fourier transform is performed on the high-sampling received signal to obtain the high-resolution frequency of the received signal. The domain response, at the same time, calculates the frequency domain response power ratio of the superimposed signal and the superimposed signal, and normalizes the frequency domain response of the superimposed signal to obtain a normalized frequency domain response of the superimposed signal. It should be noted that the size of the spectral resolution that can be reserved is determined by the capability of the exciter. The higher the spectral resolution that can be supported, the stronger the performance improvement capability.
将归一化后的受叠信号频域响应对应到加叠信号频域响应(对应OFDM系统中的子载波)，并对交叠的频域响应进行预畸变处理，以使最终耦合得到新的基带时域信号的频域响应保持为本来期望的加 叠信号频域响应。因此，预畸变处理是根据期望的加叠信号频域响应进行的，具体步骤包括：计算期望的加叠信号频域响应与受叠信号频域响应的差值；将位于所述交叠区域的所述加叠信号的频域响应替换为所述差值，并形成新频域响应；对新频域响应进行时域变换，生成新加叠基带信号。Corresponding the frequency domain response of the superimposed signal to the frequency domain response of the overlapped signal (corresponding to the subcarriers in the OFDM system), and predistorting the overlapping frequency domain responses, so that the final coupling is new. The frequency domain response of the baseband time domain signal maintains the frequency domain response of the overlay signal that is expected to be the original. Therefore, the predistortion processing is performed according to a desired frequency domain response of the superimposed signal, and the specific steps include: calculating a difference between a frequency domain response of the desired superimposed signal and a frequency domain response of the superimposed signal; and being located at the overlapping area The frequency domain response of the added signal is replaced by the difference and a new frequency domain response is formed; the new frequency domain response is time domain transformed to generate a newly added baseband signal.
步骤S40，将生成的所述新加叠信号与所述受叠信号进行耦合叠加，生成新基带信号。Step S40, coupling the generated new overlap signal with the superimposed signal to generate a new baseband signal.
耦合之后的新基带信号在交叠区域的频点上保留了期望的加叠信号的频域响应，使得加叠信号的接收性能大大提高。而由于受叠信号的频谱分辨率高于加叠信号，在频带交叠区域内只有较少频点的受叠信号的频域响应会受到影响，从而实现带内同频广播信号的自干扰消除及削弱。The new baseband signal after coupling preserves the frequency domain response of the desired overlap signal at the frequency of the overlap region, so that the reception performance of the add-on signal is greatly improved. Since the spectral resolution of the superimposed signal is higher than that of the superimposed signal, the frequency domain response of the superimposed signal with less frequency points in the overlapping region of the frequency band is affected, thereby realizing self-interference cancellation of the in-band same-frequency broadcast signal. And weakened.
进一步的，参照图3，本发明第二实施例提供一种带内同频自干扰消除方法，基于上述图2所示的实施例，所述对受叠信号进行频域响应分析，得到与加叠信号对应的受叠信号频域响应的步骤之前，包括：Further, referring to FIG. 3, a second embodiment of the present invention provides an in-band intra-frequency self-interference cancellation method. According to the embodiment shown in FIG. 2, the frequency domain response analysis of the received signal is obtained and added. Before the step of the frequency domain response of the stacked signal corresponding to the stacked signal, the method includes:
步骤S50，对所述受叠信号、所述加叠信号进行采样；其中，所述受叠信号的采样率为预设倍数的所述加叠信号的采样率。Step S50, sampling the superimposed signal and the superimposed signal; wherein, the sampling rate of the superimposed signal is a sampling rate of the overlapped signal of a preset multiple.
如图6所示，图6为本发明带内同频自干扰消除方法信号处理流程示意图。为了最大限度减少信号耦合之后对受叠信号的干扰，需要对受叠信号进行高倍采样，采样率为M倍的加叠信号采样率，以使加叠信号在频域上的干扰限制在少数位置。例如，假设已知加叠信号的采样频率为fs，且其频谱分辨率为：Δf＝f s/N fft，N fft为FFT变换计算的点数；则受叠信号的采样频率为M*f s，M为正整数。 As shown in FIG. 6, FIG. 6 is a schematic diagram of a signal processing flow of an in-band intra-frequency self-interference cancellation method according to the present invention. In order to minimize the interference of the signal after the signal coupling, it is necessary to perform high-sampling on the folded signal, and the sampling rate is M times the sampling rate of the stacked signal, so that the interference of the stacked signal in the frequency domain is limited to a few positions. . For example, suppose that the sampling frequency of the known overlap signal is fs, and its spectral resolution is: Δf=f s /N fft , N fft is the number of points calculated by the FFT transform; then the sampling frequency of the superimposed signal is M*f s , M is a positive integer.
进一步的，所述对受叠信号进行频域响应分析，得到与加叠信号对应的受叠信号频域响应的步骤具体包括：Further, the step of performing a frequency domain response analysis on the received signal to obtain a frequency domain response of the received signal corresponding to the added signal includes:
步骤S11，根据预设变换算法，对已采样的所述受叠信号进行变换，得到高分辨率受叠信号频域响应；Step S11, transforming the sampled received signal according to a preset transform algorithm to obtain a frequency domain response of the high resolution received signal;
对受叠信号高倍采样完成后，继续进行(M*N fft)点的变换，得到高分辨率的变换频域响应；其中，所述预设变换算法优选FFT算 法(Fast Fourier Transformation，即快速傅里叶变换算法)。需要说明的是，M的取值视基带信号耦合激励器的能力和实际需求而定，通过实验发现当M≥4时可以较明显地降低受叠信号受到的干扰。 After the high-sampling of the superimposed signal is completed, the (M*N fft ) point transformation is continued to obtain a high-resolution transform frequency domain response; wherein the preset transform algorithm is preferably a FFT algorithm (Fast Fourier Transformation) Liye transform algorithm). It should be noted that the value of M depends on the capability and actual demand of the baseband signal coupling exciter. It is found through experiments that when M≥4, the interference of the received signal can be significantly reduced.
步骤S12，计算所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应。Step S12, calculating a power ratio of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal.
具体包括：根据所述受叠信号频域响应与所述加叠信号的载波位置的对应位置关系，计算所述受叠信号对应位置的频域响应的功率比；将各对应位置的频域响应分别与对应的功率比相除，并进行功率归一化，以得到归一化后的受叠信号频域响应。Specifically, the method includes: calculating, according to a corresponding positional relationship between the frequency domain response of the received signal and the carrier position of the added signal, a power ratio of a frequency domain response of the corresponding position of the received signal; and frequency domain response of each corresponding position Dividing separately from the corresponding power ratio and performing power normalization to obtain a normalized frequency domain response of the received signal.
对受叠信号进行高分辨率FFT变换之后，其序号为M*m的频域响应在频谱上对应为加叠信号的频域响应；其中，m∈P，P为加叠信号初始采样率下对应的载波位置。分别计算各序号对应的加叠信号频域响应的功率比P r(m)，将受叠信号对应位置上的频域响应分别除以P r(m)进行功率归一化，得到归一化之后的频域响应。 After the high-resolution FFT transform of the superimposed signal, the frequency domain response with the sequence number M*m corresponds to the frequency domain response of the superimposed signal in the spectrum; wherein m∈P, P is the initial sampling rate of the superimposed signal. Corresponding carrier position. Calculate the power ratio P r (m) of the frequency domain response of the superimposed signal corresponding to each sequence number, and divide the frequency domain response at the corresponding position of the superimposed signal by P r (m) to normalize the power to obtain normalization. After the frequency domain response.
本实施例中，通过对受叠信号进行高倍采样、计算受叠信号高分辨率的频域响应、归一化处理，使得后续在受叠信号和加叠信号耦合时，受叠信号只有较少的频域响应受到干扰。In this embodiment, by performing high-sampling on the superimposed signal, calculating a high-frequency frequency domain response and normalization processing of the superimposed signal, the subsequent superimposed signals are less coupled when the superimposed signal and the superimposed signal are coupled. The frequency domain response is disturbed.
进一步的，参照图4，本发明第三实施例提供一种带内同频自干扰消除方法，基于上述图2所示的实施例，所述计算所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应的步骤，包括：Further, referring to FIG. 4, a third embodiment of the present invention provides an in-band intra-frequency self-interference cancellation method. Based on the foregoing embodiment shown in FIG. 2, the calculating the frequency domain response of the received signal and the corresponding position And adding a power ratio of the frequency domain response of the superimposed signal and performing power normalization to obtain a normalized frequency domain response of the superimposed signal, including:
步骤S31，根据所述受叠信号频域响应与所述加叠信号频域响应的位置对应关系，计算所述受叠信号频域响应与所述加叠信号频域响应的功率比；Step S31, calculating a power ratio of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal according to a position correspondence relationship between the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal;
步骤S32，将所述受叠信号频域响应分别与对应的功率比相除，并进行功率归一化，得到归一化后的受叠信号频域响应；Step S32, dividing the frequency domain response of the overlapped signal by a corresponding power ratio, and performing power normalization to obtain a normalized frequency domain response of the received signal;
受叠信号的频域响应经过频域IFFT变换(inverse Fast Fourier transform，快速傅里叶反变换)后，与加叠信号具有相同的频域尺度特征。由离散傅里叶反变换公式可知两个时域基带信号的耦合公式可 以表示成：The frequency domain response of the superimposed signal has the same frequency domain scale characteristics as the superimposed signal after the inverse fast Fourier transform (Fast Fourier Transform). According to the inverse discrete Fourier transform formula, the coupling formula of two time-domain baseband signals can be expressed as:
Figure PCTCN2018075273-appb-000001
Figure PCTCN2018075273-appb-000001
当两个信号存在交叠区域时，意味着一些k值对应点X 1(k)和X 2(k)均有频域响应，耦合后的两路信号的频域响应变为两个频域响应之和。假设归一化后的受叠信号频域响应为已知的X 1(k)，加叠信号频域响应预期为X 2(k)，当两个信号直接叠加时，频域响应将变成X 3(k)＝X 1(k)+X 2(k)。基于带内同频无线广播自干扰消除的目的，上述两个信号X 1(k)和X 2(k)叠加后的频域响应应为X 2(k)，则加叠信号实际发送的频域响应变为[X 2(k)-X 1(k)]。 When there are overlapping regions of two signals, it means that some k values correspond to the frequency domain responses of points X 1 (k) and X 2 (k), and the frequency domain response of the coupled two signals becomes two frequency domains. The sum of the responses. Assuming that the normalized frequency domain response of the superimposed signal is a known X 1 (k), the frequency domain response of the superimposed signal is expected to be X 2 (k). When the two signals are directly superimposed, the frequency domain response will become X 3 (k)=X 1 (k)+X 2 (k). For the purpose of self-interference cancellation of in-band co-frequency radio broadcasting, the frequency domain response of the above two signals X 1 (k) and X 2 (k) after superposition should be X 2 (k), then the frequency of the actual transmission of the superimposed signal is added. The domain response becomes [X 2 (k)-X 1 (k)].
由以上推导，可以发现：预畸变的原理就是将加叠信号期望频域响应X 2(k)替换为加叠信号期望频域响应X 2(k)与受叠信号频域响应X 1(k)的差值。这样，耦合之后的信号在交叠的频点上保留了加叠信号的频域响应，使得加叠信号的接收性能大大提高。 From the above derivation, it can be found that the principle of predistortion is to replace the expected frequency domain response X 2 (k) of the superimposed signal with the expected frequency domain response X 2 (k) of the superimposed signal and the frequency domain response of the superimposed signal X 1 (k The difference. Thus, the signal after coupling retains the frequency domain response of the superimposed signal at the overlapping frequency points, so that the receiving performance of the superimposed signal is greatly improved.
在形成新加叠信号频域响应之后，还包括：After forming a frequency domain response of the newly added signal, the method further includes:
步骤S33，确定信号耦合后所述频域交叠区域的目标功率，并获取加叠信号平均功率、所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比；Step S33, determining target power of the frequency domain overlap region after signal coupling, and acquiring an average power of the overlapped signal, a frequency ratio of the frequency domain response of the overlapped signal and a frequency domain response of the overlapped signal corresponding to the corresponding position;
步骤S34，根据所述目标功率、所述加叠信号平均功率及所述功率比，得到预畸变处理后的所述加叠信号频域响应的功率系数；Step S34, obtaining a power coefficient of the frequency domain response of the overlapped signal after the predistortion processing according to the target power, the average power of the overlapped signal, and the power ratio;
步骤S35，将预畸变处理后的所述加叠信号频域响应与所述功率系数相乘，得到所述新加叠信号频域响应。Step S35, multiplying the frequency domain response of the superimposed signal by the predistortion processing and multiplying the power coefficient to obtain a frequency domain response of the newly added signal.
考虑到加叠信号和受叠信号频域响应的功率比为P r(m)，基带信号耦合各频域响应点的功率可表示为[1+P r(m)]*A，A为加叠信号平均功率；对于基于OFDM的数字广播信号而言，A的取值为固定值，带内平均功率较为平稳；当受叠信号为模拟广播信号时，则可能存在起伏，此时根据实际确定一个耦合后频域交叠区域的目标功率P T，则耦合信号频域响应[X 2(k)-X 1(k)]应乘以功率系数P T/{[1+P r(m)]*A}， 以使耦合之后的频带交叠区域的频域响应功率保持平稳。 Considering that the power ratio of the frequency domain response of the superimposed signal and the superimposed signal is P r (m), the power of the baseband signal coupled to each frequency domain response point can be expressed as [1+P r (m)]*A, and A is plus The average power of the stacked signal; for the OFDM-based digital broadcast signal, the value of A is a fixed value, and the average power in the band is relatively stable; when the received signal is an analog broadcast signal, there may be an ups and downs, which is determined according to the actual situation. The target power P T of a coupled frequency domain overlap region, then the frequency domain response [X 2 (k)-X 1 (k)] of the coupled signal should be multiplied by the power coefficient P T /{[1+P r (m) ]*A}, so that the frequency domain response power of the band overlap region after coupling is kept stable.
步骤S36，对所述新加叠信号频域响应进行时域变换，生成所述新加叠信号。Step S36, performing time domain transformation on the frequency domain response of the newly added signal to generate the newly added signal.
在采用本发明实施例提供的带内同频自干扰消除方法时，由于受叠信号的频谱分辨率高于新加叠信号，在受叠信号和新加叠信号的频带交叠区域内，只会有比较少的几个频点的频域响应受到影响。当带内同频广播频带交叠无法避免时，也可比较合理地削弱同频干扰造成的影响。When the intra-band co-channel self-interference cancellation method provided by the embodiment of the present invention is adopted, since the spectral resolution of the received signal is higher than the newly added signal, in the overlapping region of the band of the received signal and the newly added signal, only There will be fewer frequency points in the frequency domain response. When the overlap of intra-band intra-frequency broadcast bands cannot be avoided, the influence of co-channel interference can be reasonably weakened.
此外，本发明实施例还提出一种计算机可读存储介质，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如下操作：In addition, an embodiment of the present invention further provides a computer readable storage medium, where the in-band intra-frequency self-interference cancellation program is stored, and the in-band intra-frequency self-interference cancellation program is executed by a processor. Implement the following operations:
对受叠信号进行频域响应分析，得到与加叠信号对应的受叠信号频域响应；其中，所述受叠信号、所述加叠信号均为基带时域信号；Performing a frequency domain response analysis on the received signal to obtain a frequency domain response of the received signal corresponding to the added signal; wherein the received signal and the added signal are baseband time domain signals;
识别所述受叠信号频域响应及所述加叠信号频域响应的频域交叠区域；Identifying a frequency domain overlap region of the overlapped signal frequency domain response and the frequency domain response of the overlapped signal;
根据所述加叠信号频域响应，对位于所述频域交叠区域的所述加叠信号频域响应进行预畸变处理，以生成新加叠信号；And performing pre-distortion processing on the frequency-domain response of the overlapped signal located in the overlapping region of the frequency domain to generate a newly added signal according to the frequency domain response of the overlap signal;
将生成的所述新加叠信号与所述受叠信号进行耦合叠加，生成新基带信号。The generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
进一步地，所述带内同频自干扰消除程序被处理器执行时还实现如下操作：Further, when the in-band intra-frequency self-interference cancellation program is executed by the processor, the following operations are also implemented:
对所述受叠信号、所述加叠信号进行采样；其中，所述受叠信号的采样率为预设倍数的所述加叠信号的采样率。And sampling the superimposed signal and the superimposed signal; wherein, the sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.
进一步地，所述带内同频自干扰消除程序被处理器执行时还实现如下操作：Further, when the in-band intra-frequency self-interference cancellation program is executed by the processor, the following operations are also implemented:
根据预设变换算法，对已采样的所述受叠信号进行变换，得到高分辨率受叠信号频域响应；Performing, according to a preset transform algorithm, transforming the sampled received signal to obtain a frequency domain response of the high resolution received signal;
计算所述受叠信号频域响应与对应位置的所述加叠信号频域响 应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应。Calculating a power ratio of the frequency domain response of the overlapped signal to a frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal.
进一步地，所述带内同频自干扰消除程序被处理器执行时还实现如下操作：Further, when the in-band intra-frequency self-interference cancellation program is executed by the processor, the following operations are also implemented:
根据所述受叠信号频域响应与所述加叠信号频域响应的位置对应关系，计算所述受叠信号频域响应与所述加叠信号频域响应的功率比；Calculating, according to a position correspondence relationship between the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal, calculating a power ratio of the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal;
将所述受叠信号频域响应分别与对应的功率比相除，并进行功率归一化，得到归一化后的受叠信号频域响应。Dividing the frequency domain response of the overlapped signal with a corresponding power ratio and performing power normalization to obtain a normalized frequency domain response of the received signal.
进一步地，所述带内同频自干扰消除程序被处理器执行时还实现如下操作：Further, when the in-band intra-frequency self-interference cancellation program is executed by the processor, the following operations are also implemented:
计算所述加叠信号频域响应与所述受叠信号频域响应的差值；Calculating a difference between a frequency domain response of the added signal and a frequency domain response of the received signal;
将位于所述交叠区域的所述加叠信号频域响应替换为所述差值，以形成新加叠信号频域响应；Substituting the overlapped signal frequency domain response at the overlap region with the difference to form a newly added signal frequency domain response;
对所述新加叠信号频域响应进行时域变换，生成所述新加叠信号。Performing a time domain transform on the frequency domain response of the newly added signal to generate the newly added signal.
进一步地，所述带内同频自干扰消除程序被处理器执行时还实现如下操作：Further, when the in-band intra-frequency self-interference cancellation program is executed by the processor, the following operations are also implemented:
确定信号耦合后所述频域交叠区域的目标功率，并获取加叠信号平均功率、所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比；Determining a target power of the frequency domain overlap region after signal coupling, and acquiring an average power of the overlapped signal, a frequency ratio of the frequency domain response of the overlapped signal, and a frequency ratio of the frequency domain response of the overlapped signal at a corresponding position;
根据所述目标功率、所述加叠信号平均功率及所述功率比，得到预畸变处理后的所述加叠信号频域响应的功率系数；Obtaining a power coefficient of the frequency domain response of the added signal after the predistortion processing according to the target power, the average power of the added signal, and the power ratio;
将预畸变处理后的所述加叠信号频域响应与所述功率系数相乘，得到所述新加叠信号频域响应。And multiplying the frequency-domain response of the pre-distortion processing with the power coefficient to obtain a frequency domain response of the newly added signal.
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的 相同要素。It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, item, or system. An element defined by the phrase "comprising a ...", without further limitation, does not exclude the presence of additional elements in the process, method, article, or system including the element.
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在如上所述的一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台装置执行本发明各个实施例所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, portions of the technical solution of the present invention that contribute substantially or to the prior art may be embodied in the form of a software product stored in a storage medium (such as a ROM/RAM as described above). , a disk, an optical disk, includes a number of instructions for causing a device to perform the methods described in various embodiments of the present invention.
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims (18)

  1. 一种带内同频自干扰消除方法，其特征在于，所述方法包括以下步骤：An in-band co-frequency self-interference cancellation method, characterized in that the method comprises the following steps:
    对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应；其中，所述受叠信号、所述加叠信号均为基带时域信号；The frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain response of the superimposed signal, wherein the superposed signal and the superimposed signal are baseband time domain signals;
    识别所述受叠信号频域响应与所述加叠信号频域响应的频域交叠区域；Identifying a frequency domain overlap region of the frequency domain response of the overlapped signal and the frequency domain response of the overlapped signal;
    根据所述加叠信号频域响应，对位于所述频域交叠区域的所述加叠信号的频域响应进行预畸变处理，以生成新加叠信号；And performing predistortion processing on the frequency domain response of the overlapped signal located in the overlapping region of the frequency domain to generate a newly added signal according to the frequency domain response of the overlap signal;
    将生成的所述新加叠信号与所述受叠信号进行耦合叠加，生成新基带信号。The generated new stacked signal is coupled with the superimposed signal to generate a new baseband signal.
  2. 如权利要求1所述的带内同频自干扰消除方法，其特征在于，所述对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应的步骤之前，包括：The in-band co-channel self-interference cancellation method according to claim 1, wherein the frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain of the superimposed signal. Before the steps to respond, include:
    对所述受叠信号、所述加叠信号进行采样；其中，所述受叠信号的采样率为预设倍数的所述加叠信号的采样率。And sampling the superimposed signal and the superimposed signal; wherein, the sampling rate of the superimposed signal is a sampling rate of the superimposed signal of a preset multiple.
  3. 如权利要求1所述的带内同频自干扰消除方法，其特征在于，所述对受叠信号、加叠信号进行频域响应分析，分别得到受叠信号频域响应、加叠信号频域响应的步骤，包括：The in-band co-channel self-interference cancellation method according to claim 1, wherein the frequency domain response analysis of the superimposed signal and the superimposed signal respectively obtains a frequency domain response of the superimposed signal and a frequency domain of the superimposed signal. The steps of the response include:
    根据预设变换算法，对已采样的所述受叠信号进行变换，得到高分辨率受叠信号频域响应；Performing, according to a preset transform algorithm, transforming the sampled received signal to obtain a frequency domain response of the high resolution received signal;
    计算所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应。Calculating a power ratio of the frequency domain response of the overlapped signal to a frequency domain response of the overlapped signal at a corresponding position, and performing power normalization to obtain a normalized frequency domain response of the received signal.
  4. 如权利要求3所述的带内同频自干扰消除方法，其特征在于，所述计算所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比，并进行功率归一化，得到归一化后的受叠信号频域响应的步骤，包括：The in-band co-frequency self-interference cancellation method according to claim 3, wherein the calculating a power ratio of the frequency domain response of the superimposed signal and the frequency domain response of the overlapped signal at a corresponding position, and performing power Normalization, the step of obtaining a normalized frequency domain response of the received signal, comprising:
    根据所述受叠信号频域响应与所述加叠信号频域响应的位置对 应关系，计算所述受叠信号频域响应与所述加叠信号频域响应的功率比；Calculating a power ratio of the frequency domain response of the superimposed signal to the frequency domain response of the superimposed signal according to a positional relationship between the frequency domain response of the superimposed signal and the frequency domain response of the superimposed signal;
    将所述受叠信号频域响应分别与对应的功率比相除，并进行功率归一化，得到归一化后的受叠信号频域响应。Dividing the frequency domain response of the overlapped signal with a corresponding power ratio and performing power normalization to obtain a normalized frequency domain response of the received signal.
  5. 如权利要求1所述的带内同频自干扰消除方法，其特征在于，所述根据所述加叠信号频域响应，对位于所述交叠区域的所述加叠信号频域响应进行预畸变处理，以生成新加叠信号的步骤包括：The in-band co-channel self-interference cancellation method according to claim 1, wherein the frequency domain response of the overlap signal is pre-predicted according to the frequency domain response of the overlap signal The steps of distortion processing to generate a new stacked signal include:
    计算所述加叠信号频域响应与所述受叠信号频域响应的差值；Calculating a difference between a frequency domain response of the added signal and a frequency domain response of the received signal;
    将位于所述交叠区域的所述加叠信号频域响应替换为所述差值，以形成新加叠信号频域响应；Substituting the overlapped signal frequency domain response at the overlap region with the difference to form a newly added signal frequency domain response;
    对所述新加叠信号频域响应进行时域变换，生成所述新加叠信号。Performing a time domain transform on the frequency domain response of the newly added signal to generate the newly added signal.
  6. 如权利要求5所述的带内同频自干扰消除方法，其特征在于，将位于所述交叠区域的所述加叠信号频域响应替换为所述差值，以形成新加叠信号频域响应的步骤之后，还包括：The in-band co-channel self-interference cancellation method according to claim 5, wherein the frequency-domain response of the overlapped signal located in the overlap region is replaced with the difference to form a newly added signal frequency. After the steps of the domain response, it also includes:
    确定信号耦合后所述频域交叠区域的目标功率，并获取加叠信号平均功率、所述受叠信号频域响应与对应位置的所述加叠信号频域响应的功率比；Determining a target power of the frequency domain overlap region after signal coupling, and acquiring an average power of the overlapped signal, a frequency ratio of the frequency domain response of the overlapped signal, and a frequency ratio of the frequency domain response of the overlapped signal at a corresponding position;
    根据所述目标功率、所述加叠信号平均功率及所述功率比，得到预畸变处理后的所述加叠信号频域响应的功率系数；Obtaining a power coefficient of the frequency domain response of the added signal after the predistortion processing according to the target power, the average power of the added signal, and the power ratio;
    将预畸变处理后的所述加叠信号频域响应与所述功率系数相乘，得到所述新加叠信号频域响应。And multiplying the frequency-domain response of the pre-distortion processing with the power coefficient to obtain a frequency domain response of the newly added signal.
  7. 一种带内同频自干扰消除装置，其特征在于，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰消除程序被所述处理器执行时实现如权利要求1所述的带内同频自干扰消除方法的步骤。An in-band co-channel self-interference cancellation device, characterized in that the in-band intra-frequency self-interference cancellation device comprises: a memory, a processor, and an in-band stored on the memory and operable on the processor The same frequency self-interference cancellation program, the step of implementing the in-band co-frequency self-interference cancellation method according to claim 1 when the in-band intra-frequency self-interference cancellation program is executed by the processor.
  8. 一种带内同频自干扰消除装置，其特征在于，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰 消除程序被所述处理器执行时实现如权利要求2所述的带内同频自干扰消除方法的步骤。An in-band co-channel self-interference cancellation device, characterized in that the in-band intra-frequency self-interference cancellation device comprises: a memory, a processor, and an in-band stored on the memory and operable on the processor The same frequency self-interference cancellation program, wherein the in-band intra-frequency self-interference cancellation program is implemented by the processor to implement the step of the in-band intra-frequency self-interference cancellation method according to claim 2.
  9. 一种带内同频自干扰消除装置，其特征在于，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰消除程序被所述处理器执行时实现如权利要求3所述的带内同频自干扰消除方法的步骤。An in-band co-channel self-interference cancellation device, characterized in that the in-band intra-frequency self-interference cancellation device comprises: a memory, a processor, and an in-band stored on the memory and operable on the processor The same frequency self-interference cancellation program, wherein the in-band intra-frequency self-interference cancellation program is implemented by the processor to implement the step of the in-band co-frequency self-interference cancellation method according to claim 3.
  10. 一种带内同频自干扰消除装置，其特征在于，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰消除程序被所述处理器执行时实现如权利要求4所述的带内同频自干扰消除方法的步骤。An in-band co-channel self-interference cancellation device, characterized in that the in-band intra-frequency self-interference cancellation device comprises: a memory, a processor, and an in-band stored on the memory and operable on the processor The same frequency self-interference cancellation program, wherein the in-band intra-frequency self-interference cancellation program is executed by the processor to implement the step of the in-band intra-frequency self-interference cancellation method according to claim 4.
  11. 一种带内同频自干扰消除装置，其特征在于，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰消除程序被所述处理器执行时实现如权利要求5所述的带内同频自干扰消除方法的步骤。An in-band co-channel self-interference cancellation device, characterized in that the in-band intra-frequency self-interference cancellation device comprises: a memory, a processor, and an in-band stored on the memory and operable on the processor The same frequency self-interference cancellation program, wherein the in-band intra-frequency self-interference cancellation program is implemented by the processor to implement the step of the in-band intra-frequency self-interference cancellation method according to claim 5.
  12. 一种带内同频自干扰消除装置，其特征在于，所述带内同频自干扰消除装置包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的带内同频自干扰消除程序，所述带内同频自干扰消除程序被所述处理器执行时实现如权利要求6所述的带内同频自干扰消除方法的步骤。An in-band co-channel self-interference cancellation device, characterized in that the in-band intra-frequency self-interference cancellation device comprises: a memory, a processor, and an in-band stored on the memory and operable on the processor The same frequency self-interference cancellation program, wherein the in-band intra-frequency self-interference cancellation program is implemented by the processor to implement the step of the in-band intra-frequency self-interference cancellation method according to claim 6.
  13. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如权利要求1所述的带内同频自干扰消除方法的步骤。A computer readable storage medium, characterized in that the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, and the in-band intra-frequency self-interference cancellation program is executed by a processor to implement the claims The step of the in-band co-frequency self-interference cancellation method described in 1.
  14. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如权利要求2所述的带内同频自干扰消除方法的步骤。A computer readable storage medium, characterized in that the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, and the in-band intra-frequency self-interference cancellation program is executed by a processor to implement the claims 2 The step of the in-band co-frequency self-interference cancellation method.
  15. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如权利要求3所述的带内同频自干扰消除方法的步骤。A computer readable storage medium, characterized in that the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, and the in-band intra-frequency self-interference cancellation program is executed by a processor to implement the claims 3 The step of the in-band co-frequency self-interference cancellation method.
  16. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如权利要求4所述的带内同频自干扰消除方法的步骤。A computer readable storage medium, characterized in that the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, and the in-band intra-frequency self-interference cancellation program is executed by a processor to implement the claims The step of the in-band co-frequency self-interference cancellation method described in 4.
  17. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如权利要求5所述的带内同频自干扰消除方法的步骤。A computer readable storage medium, characterized in that the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, and the in-band intra-frequency self-interference cancellation program is executed by a processor to implement the claims The step of the in-band co-frequency self-interference cancellation method described in 5.
  18. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有带内同频自干扰消除程序，所述带内同频自干扰消除程序被处理器执行时实现如权利要求6所述的带内同频自干扰消除方法的步骤。A computer readable storage medium, characterized in that the computer readable storage medium stores an in-band intra-frequency self-interference cancellation program, and the in-band intra-frequency self-interference cancellation program is executed by a processor to implement the claims The step of the in-band co-frequency self-interference cancellation method described in 6.
PCT/CN2018/075273 2017-09-20 2018-02-05 Method and device for in-band co-frequency self-interference cancellation, and computer-readable storage medium WO2019056689A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710862580.9 2017-09-20
CN201710862580.9A CN107493107B (en) 2017-09-20 2017-09-20 In-band on-channel self-interference removing method, device and computer readable storage medium

Publications (1)

Publication Number Publication Date
WO2019056689A1 true WO2019056689A1 (en) 2019-03-28

Family

ID=60652649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/075273 WO2019056689A1 (en) 2017-09-20 2018-02-05 Method and device for in-band co-frequency self-interference cancellation, and computer-readable storage medium

Country Status (2)

Country Link
CN (1) CN107493107B (en)
WO (1) WO2019056689A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107493107B (en) * 2017-09-20 2019-06-28 深圳思凯微电子有限公司 In-band on-channel self-interference removing method, device and computer readable storage medium
CN109672959A (en) * 2018-12-24 2019-04-23 维沃移动通信有限公司 A kind of signal processing method, terminal device and computer readable storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8300742B1 (en) * 2007-11-21 2012-10-30 Bromberg Matthew C Systems and methods for channel based beamforming for stacked carrier multiple access
CN104054310A (en) * 2012-01-16 2014-09-17 高通股份有限公司 Frequency domain interference cancellation and equalization for downlink cellular systems
CN105991486A (en) * 2015-01-30 2016-10-05 中国移动通信集团公司 Interference elimination method and device
CN107493107A (en) * 2017-09-20 2017-12-19 深圳思凯微电子有限公司 In-band on-channel self-interference removing method, device and computer-readable recording medium

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6639949B2 (en) * 2001-12-17 2003-10-28 Ibiquity Digital Corporation Method and apparatus for pulse overlap pre-compensation in digitally modulated signals
CN1674450A (en) * 2004-03-26 2005-09-28 中国科学院半导体研究所 Analog modulation carrier interference eliminating method in on-band co-channel digital audio frequency broadcasting
US8798196B2 (en) * 2011-01-25 2014-08-05 Ibiquity Digital Corporation Peak-to-average power ratio reduction for hybrid FM HD radio transmission
CN102142852B (en) * 2011-03-12 2014-07-30 桂林市思奇通信设备有限公司 Method and equipment for transmitting digital-analog audio broadcasting
CN202309690U (en) * 2011-08-06 2012-07-04 桂林市思奇通信设备有限公司 Frequency modulation broadcast frequency range digital broadcast signal receiving system
CN102394739B (en) * 2011-08-06 2014-03-12 桂林市思奇通信设备有限公司 Generation method and transmitting equipment for in band on channel (IBOC) digital/analog audio broadcast signals
CN102394714B (en) * 2011-08-06 2014-03-12 桂林市思奇通信设备有限公司 Method and system for receiving digital broadcasting signals in frequency modulation (FM) broadcast bands
CN103001912B (en) * 2012-11-12 2015-10-14 深圳思凯微电子有限公司 The self adaptation band internal modulation method of FM broadcasting band number analog/mixed signal
CN102957662B (en) * 2012-11-12 2015-10-14 深圳思凯微电子有限公司 Segmentation modulator approach in the band of FM broadcasting band number analog/mixed signal
CN103457615A (en) * 2013-08-16 2013-12-18 奥维通信股份有限公司 Audio broadcasting frequency modulation transmitter based on digital-analog networking

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8300742B1 (en) * 2007-11-21 2012-10-30 Bromberg Matthew C Systems and methods for channel based beamforming for stacked carrier multiple access
CN104054310A (en) * 2012-01-16 2014-09-17 高通股份有限公司 Frequency domain interference cancellation and equalization for downlink cellular systems
CN105991486A (en) * 2015-01-30 2016-10-05 中国移动通信集团公司 Interference elimination method and device
CN107493107A (en) * 2017-09-20 2017-12-19 深圳思凯微电子有限公司 In-band on-channel self-interference removing method, device and computer-readable recording medium

Also Published As

Publication number Publication date
CN107493107B (en) 2019-06-28
CN107493107A (en) 2017-12-19

Similar Documents

Publication Publication Date Title
US10263721B2 (en) Simultaneous call transmission detection
US20170047954A1 (en) Pre-distortion system and method
GB2500679A (en) Multicarrier channel with DFT based OFDM control/pilot signals and FB based OFDM user/payload signals
US20170214518A1 (en) Method and apparatus for estimating and correcting phase error in wireless communication system
US8718187B2 (en) Methods and apparatuses for in-phase and quadrature-phase imbalance compensation
JP2007329539A (en) Wireless transmission apparatus and wireless transmission method
WO2011136374A1 (en) User equipment and method in wireless communication system
WO2019056689A1 (en) Method and device for in-band co-frequency self-interference cancellation, and computer-readable storage medium
JP7079566B2 (en) Signal processing circuit
CN102130864A (en) Channel estimation method and device
KR20120115402A (en) Wireless communication apparatus
US9374115B2 (en) Method, base station and apparatus in a base station for reducing intermodulation distortion
JP4191919B2 (en) Frequency characteristic detector for OFDM, frequency characteristic compensator for OFDM, and relay apparatus for OFDM
Tripathi et al. Delay compensation for 4G/5G transmitter system characterization
TWI308431B (en) Apparatus and method for estimating a clipping parameter of an ofdm system
WO2016039668A2 (en) Interference mitigation
US20040220986A1 (en) Fractional fourier transform convolver arrangement
Gupta et al. Performance on ICI Self‐Cancellation in FFT‐OFDM and DCT‐OFDM System
US20230344577A1 (en) Reference signal transmission method and device, communication node, and storage medium
CN104702555A (en) Method for restraining peak-to-average ratio of DCO-OFDM system
CN110191398B (en) Howling suppression method, howling suppression device and computer readable storage medium
EP3284230B1 (en) Time domain n continuous dft-s-ofdm for sidelobes reduction
JP4109530B2 (en) Wraparound canceller
CN109547378B (en) Algorithm for reducing peak-to-average power ratio of O-OFDM signal by using correction signal loaded on null subcarrier
JP2003523135A (en) Method for finding residual carrier power of multicarrier signal QAM-modulated in 8K mode according to DVB-T standard

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18858013

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18858013

Country of ref document: EP

Kind code of ref document: A1