WO2017008520A1 - 一种抑制干扰信号的方法和装置 - Google Patents

一种抑制干扰信号的方法和装置 Download PDF

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WO2017008520A1
WO2017008520A1 PCT/CN2016/076159 CN2016076159W WO2017008520A1 WO 2017008520 A1 WO2017008520 A1 WO 2017008520A1 CN 2016076159 W CN2016076159 W CN 2016076159W WO 2017008520 A1 WO2017008520 A1 WO 2017008520A1
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signal
accurate
coarse
interference
channel estimation
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English (en)
French (fr)
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王希
吴刚
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to US15/742,034 priority Critical patent/US20180198645A1/en
Priority to EP16823667.7A priority patent/EP3322144A4/en
Publication of WO2017008520A1 publication Critical patent/WO2017008520A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Definitions

  • the present application relates to communication technologies, and in particular, to a method and apparatus for suppressing interference signals.
  • LTE Long Term Evolution
  • IRC Interference Rejection Combining
  • the key to IRC is to obtain more accurate channel estimation results H and C n .
  • the general method for calculating C n is as follows:
  • C n can be obtained by using the difference between the initial channel estimation result (the received signal r divided by the pilot sequence S i ) and the channel estimation result H i of the user i, that is, the initial channel estimation result minus the final channel estimation of the user i. The result is obtained.
  • the channel estimation result H i of the user i is usually obtained by performing window denoising on the initial channel estimation result.
  • the interference is the pilot symbols exhibit a more discrete state, and simple window denoising cannot obtain more accurate channel estimation results H and C n .
  • the joint detection algorithm also improves the IRC, and transmits the scheduling information of the neighboring cell to the primary cell, and uses the cell parameters of the neighboring cell and the scheduling of the received antenna signal in the primary cell.
  • the channel estimation is performed, and the resulting channel estimation result of each user is interference to the primary cell.
  • the improved joint detection algorithm can obtain more accurate channel estimation and interference detection results than the traditional IRC algorithm, but in the actual environment, the signal of the local cell may be adjacent to each other. The cell interference is much higher, and the method of joint detection cannot calculate the accurate interference.
  • the present application provides a method and apparatus for suppressing interference signals to solve the problem of inaccurate interference acquired.
  • the present application discloses a method for suppressing an interference signal, including:
  • the signal of the received signal of the cell is reduced
  • the accurate interference signal is suppressed.
  • the reference signal of the local cell and the reference signal of the neighboring cell perform channel estimation on the received signal of the local cell after the signal is degraded, and obtain an accurate interference signal, including:
  • Channel estimation is performed on the coarse interference signal by using a reference signal of the neighboring cell to obtain an accurate interference signal.
  • the channel is estimated by using the reference signal of the local cell to perform channel estimation on the received signal of the local cell after the signal is degraded, to obtain a coarse interference signal, including:
  • the pilot symbol of the received signal of the local cell after the signal is subtracted is multiplied by the reference signal of the local cell to obtain a coarse channel frequency domain response signal modulated by the cancellation reference signal;
  • the channel signal is estimated by using the reference signal of the neighboring cell to obtain an accurate interference signal, including:
  • the suppressing the accurate interference signal comprises:
  • the accurate interference signal is suppressed according to the detection result.
  • the application also discloses an apparatus for suppressing interference signals, including:
  • the signal reduction module is configured to perform signal reduction on the received signal of the local cell
  • the channel estimation module is configured to perform channel estimation on the received signal of the local cell after the signal is reduced by using the reference signal of the local cell and the reference signal of the neighboring cell, to obtain an accurate interference signal;
  • An interference suppression module is provided to suppress the accurate interference signal.
  • the channel estimation module includes:
  • the coarse interference signal acquiring module is configured to perform channel estimation on the received signal of the local cell after the signal is reduced by using the reference signal of the local cell, to obtain a coarse interference signal;
  • the accurate interference signal acquiring module is configured to perform channel estimation on the coarse interference signal by using a reference signal of the neighboring cell to obtain an accurate interference signal.
  • the coarse interference signal acquiring module includes:
  • the coarse channel frequency domain response signal acquisition module is configured to receive the received cell after the signal is reduced
  • the pilot symbol of the signal is multiplied by a complex conjugate of the reference signal of the local cell to obtain a coarse channel frequency domain response signal modulated by the reference signal;
  • the coarse channel time domain impulse response signal acquiring module is configured to perform inverse discrete Fourier transform on the coarse channel frequency domain response signal to obtain a coarse channel time domain impulse response signal;
  • the coarse single-user time-domain impulse response signal acquiring module is configured to perform multi-user separation and window denoising on the coarse channel time domain impulse response signal to obtain a coarse single-user time domain impulse response signal;
  • the rough channel estimation result obtaining module is configured to perform a discrete Fourier transform on the coarse single-user time domain impulse response signal to obtain a rough channel estimation result of each user;
  • the coarse interference signal acquisition module is configured to subtract the coarse channel frequency domain response signal from the rough channel estimation result of each user to obtain the coarse interference signal.
  • the accurate interference signal acquisition module includes:
  • the accurate channel frequency domain response signal acquisition module is configured to multiply the coarse interference signal and the reference signal of the neighboring cell by a complex conjugate, to obtain an accurate channel frequency domain response signal modulated by the cancellation reference signal;
  • the accurate channel time domain impulse response signal acquisition module is configured to perform inverse discrete Fourier transform on the accurate channel frequency domain response signal to obtain an accurate channel time domain impulse response signal;
  • the accurate single-user time domain impulse response signal acquisition module is configured to perform multi-user separation and window denoising on the accurate channel time domain impulse response signal to obtain an accurate single-user time domain impulse response signal;
  • the accurate channel estimation result obtaining module is configured to perform Fourier transform on the accurate single-user time domain impulse response signal to obtain an accurate channel estimation result of the neighboring cell;
  • the accurate interference signal acquisition module is configured to subtract the coarse interference signal from the accurate channel estimation result of the neighboring cell to obtain the accurate interference signal.
  • the interference suppression module includes:
  • the interference detection module is configured to perform uplink interference suppression combined detection by using the accurate interference signal, to obtain a detection result
  • the precise interference suppression module is configured to suppress the accurate interference signal according to the detection result.
  • the present application includes the following advantages:
  • the received signal of the local cell is signal-reduced, and the signal after the received signal of the local cell is cancelled, and the interference is estimated by the joint neighboring cell scheduling information.
  • Acquiring accurate interference signals has better suppression effect on the uplink co-channel interference in the neighboring cell.
  • Embodiment 1 is a flow chart of a method for suppressing an interference signal according to Embodiment 1 of the present application;
  • FIG. 2 is a flow chart of a method for suppressing an interference signal according to Embodiment 2 of the present application
  • FIG. 3 is a schematic structural diagram of an apparatus for suppressing interference signals according to Embodiment 3 of the present application.
  • FIG. 4 is a schematic structural diagram of an apparatus for suppressing interference signals according to Embodiment 4 of the present application.
  • FIG. 1 a flow chart of a method for suppressing an interference signal in an embodiment of the present application is shown.
  • step 100 the received signal of the local cell is subjected to signal reduction.
  • the received signal of the cell Since the interference of the received signal of the cell is stronger than that of the neighboring cell, the received signal of the cell is first subjected to a signal subtraction operation.
  • the decrementing standard or the degree of reduction of the received signal of the cell may be set according to the actual situation.
  • the embodiment of the present application does not limit the signal reduction of the received signal of the cell.
  • Step 102 Perform channel estimation on the received signal of the local cell after the signal is subtracted by using the reference signal of the local cell and the reference signal of the neighboring cell, to obtain an accurate interference signal.
  • the scheduling information of the neighboring cell may be transmitted to the local cell, and the received antenna signal in the local cell uses the cell parameters of the neighboring cell and the scheduling information to perform channel estimation, to obtain an accurate interference signal. It should be noted that the above accurate interference signal is a more accurate interference signal with respect to the interference obtained in the prior art.
  • Step 104 suppressing the accurate interference signal.
  • the technical solution of the present application first receives the cell before acquiring the interference signal.
  • the signal is subjected to signal reduction, and the signal after subtracting the received signal of the local cell is used, and the interference is estimated by the joint neighboring cell scheduling information, and an accurate interference signal is obtained, which has better suppression effect on the uplink co-channel interference of the neighboring cell. .
  • FIG. 2 a flow chart of a method for suppressing an interference signal in an embodiment of the present application is shown.
  • step 200 the received signal of the local cell is subjected to signal reduction.
  • the received signal of the cell Since the interference of the received signal of the cell is stronger than that of the neighboring cell, the received signal of the cell is first subjected to a signal subtraction operation.
  • the decrementing standard or the degree of reduction of the received signal of the cell may be set according to the actual situation.
  • the embodiment of the present application does not limit the signal reduction of the received signal of the cell.
  • Step 202 Perform channel estimation on the received signal of the local cell after the signal is subtracted by using the reference signal of the local cell and the reference signal of the neighboring cell, to obtain an accurate interference signal.
  • the scheduling information of the neighboring cell may be transmitted to the local cell, and the received antenna signal in the local cell uses the cell parameters of the neighboring cell and the scheduling information to perform channel estimation, to obtain an accurate interference signal.
  • the above accurate interference signal is a more accurate interference signal with respect to the interference obtained in the prior art.
  • the step 202 may include:
  • Step 2021 Perform channel estimation on the received signal of the local cell after the signal is reduced by using the reference signal of the local cell, to obtain a coarse interference signal.
  • the step 2021 may include:
  • the channel estimation result H i of the user i is usually obtained by performing window denoising on the initial channel estimation result, and the specific steps are as follows:
  • Step1 Pilot symbols Will be associated with a local known reference signal Perform complex conjugate multiplication to obtain the frequency domain response of the channel after eliminating reference symbols
  • Step2 Right Inverse Discrete Fourier Transform (IDFT) is performed to obtain the time domain impulse response of the channel.
  • IDFT Right Inverse Discrete Fourier Transform
  • Step3 Right Perform multi-user separation and take out window denoising to obtain time-domain impulse response of single user after window denoising
  • Step4 Right Discrete Fourier Transform (DFT) is performed to obtain channel estimation results for each user.
  • DFT Right Discrete Fourier Transform
  • Step5 Will Get a rough interference signal
  • Step 2022 Perform channel estimation on the coarse interference signal by using a reference signal of the neighboring cell to obtain an accurate interference signal.
  • the step 2022 may include:
  • channel estimation of the coarse interference signal by using a reference signal of the neighboring cell and the specific steps of obtaining a precise interference signal are:
  • Step6 Will coarse interference signal Locally known neighbor cell reference signal Perform complex conjugate multiplication to obtain the frequency domain response of the channel after eliminating reference symbols
  • Step7 Right Perform IDFT to get the time domain impulse response of the channel
  • Step8 Right Perform multi-user separation and take out window denoising to obtain time-domain impulse response of single user after window denoising
  • Step9 Right Do DFT, get the channel estimation result of the neighbor cell user
  • the coarse interference signal in the above step 2021 is an interference signal as opposed to the accurate interference signal in step 2022, where both coarse and precise are relative.
  • Step 204 suppressing the accurate interference signal.
  • the step 204 may include:
  • Step 2041 Perform uplink interference suppression combined detection by using the accurate interference signal, and obtain a detection result.
  • the ICC detection is performed on the obtained accurate interference signal, and the detection result is obtained.
  • Step 2042 suppress the accurate interference signal according to the detection result.
  • the technical solution of the present application first performs signal reduction on the received signal of the local cell, and uses the signal after the received signal of the local cell is cancelled, and the interference is estimated by the joint neighboring cell scheduling information. Acquiring accurate interference signals has better suppression effect on the uplink co-channel interference in the neighboring cell.
  • FIG. 3 a schematic structural diagram of an apparatus for suppressing interference signals in an embodiment of the present application is shown. Figure.
  • the apparatus may include a signal reduction module 300, a channel estimation module 302, and an interference suppression module 304.
  • the signal reduction module 300 is configured to perform signal reduction on the received signal of the local cell.
  • the channel estimation module 302 is configured to perform channel estimation on the received signal of the local cell after the signal is reduced by using the reference signal of the local cell and the reference signal of the neighboring cell to obtain an accurate interference signal.
  • the above accurate interference signal is a more accurate interference signal with respect to the interference obtained in the prior art.
  • the interference suppression module 304 is configured to suppress the accurate interference signal.
  • the technical solution of the present application first performs signal reduction on the received signal of the local cell, and uses the signal after the received signal of the local cell is cancelled, and the interference is estimated by the joint neighboring cell scheduling information. Acquiring accurate interference signals has better suppression effect on the uplink co-channel interference in the neighboring cell.
  • FIG. 4 a schematic structural diagram of an apparatus for suppressing interference signals in an embodiment of the present application is shown.
  • the apparatus may include a signal reduction module 400, a channel estimation module 402, and an interference suppression module 404.
  • the channel estimation module 402 may include: a coarse interference signal acquiring module 4021, and an accurate interference signal acquiring module 4022.
  • the interference suppression module 404 can include an interference detection module 4041 and a precision interference suppression module 4042.
  • the signal reduction module 400 is configured to perform signal reduction on the received signal of the local cell.
  • the channel estimation module 402 is configured to perform channel estimation on the received signal of the local cell after the signal is degraded by using the reference signal of the local cell and the reference signal of the neighboring cell, to obtain accurate Disturbance signal.
  • the above accurate interference signal is a more accurate interference signal with respect to the interference obtained in the prior art.
  • the channel estimation module 402 can include:
  • the coarse interference signal acquiring module 4021 is configured to perform channel estimation on the received signal of the local cell after the signal is reduced by using the reference signal of the local cell, to obtain a coarse interference signal.
  • the coarse interference signal acquiring module 4021 may include:
  • the coarse channel frequency domain response signal acquiring module is configured to multiply the pilot symbol of the received signal of the local cell after the signal is subtracted and the reference signal of the local cell by a complex conjugate, to obtain a coarse channel frequency domain response after the reference signal is cancelled. signal.
  • the coarse channel time domain impulse response signal acquisition module is configured to perform inverse discrete Fourier transform on the coarse channel frequency domain response signal to obtain a coarse channel time domain impulse response signal.
  • the coarse single-user time-domain impulse response signal acquisition module is configured to perform multi-user separation and window denoising on the coarse channel time domain impulse response signal to obtain a coarse single-user time domain impulse response signal.
  • the coarse channel estimation result obtaining module is configured to perform a discrete Fourier transform on the coarse single-user time domain impulse response signal to obtain a rough channel estimation result of each user.
  • the coarse interference signal acquisition module is configured to subtract the coarse channel frequency domain response signal from the rough channel estimation result of each user to obtain the coarse interference signal.
  • the accurate interference signal acquiring module 4022 is configured to perform channel estimation on the coarse interference signal by using a reference signal of the neighboring cell to obtain a precise interference signal.
  • the accurate interference signal acquisition module 4022 may include:
  • the accurate channel frequency domain response signal acquisition module is configured to multiply the coarse interference signal and the reference signal of the neighboring cell by a complex conjugate to obtain an accurate channel frequency domain response signal modulated by the cancellation reference signal.
  • the accurate channel time domain impulse response signal acquisition module is configured to perform inverse discrete Fourier transform on the accurate channel frequency domain response signal to obtain an accurate channel time domain impulse response signal.
  • the accurate single-user time domain impulse response signal acquisition module is configured to perform multi-user separation and window denoising on the accurate channel time domain impulse response signal to obtain an accurate single-user time domain impulse response signal.
  • the accurate channel estimation result obtaining module is configured to perform Fourier transform on the accurate single-user time domain impulse response signal to obtain an accurate channel estimation result of the neighboring cell.
  • the accurate interference signal acquisition module is configured to subtract the coarse interference signal from the accurate channel estimation result of the neighboring cell to obtain the accurate interference signal.
  • the interference suppression module 404 is configured to suppress the accurate interference signal.
  • the interference suppression module 404 can include:
  • the interference detecting module 4041 is configured to perform uplink interference suppression combined detection by using the accurate interference signal to obtain a detection result.
  • the precise interference suppression module 4042 is configured to suppress the accurate interference signal according to the detection result.
  • the technical solution of the present application first performs signal reduction on the received signal of the local cell, and uses the signal after the received signal of the local cell is cancelled, and the interference is estimated by the joint neighboring cell scheduling information. Acquiring accurate interference signals has better suppression effect on the uplink co-channel interference in the neighboring cell.
  • the computer readable recording medium includes any mechanism for storing or transmitting information in a form readable by a computer (eg, a computer).
  • a machine-readable medium includes read only memory (ROM), random access memory (RAM), magnetic disk storage media, optical storage media, flash storage media, electrical, optical, acoustic, or other forms of propagation signals (eg, carrier waves) , infrared signals, digital signals, etc.).
  • the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

一种抑制干扰信号的方法和装置，其中，所述方法包括：将本小区的接收信号进行信号消减；通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号；对所述精确干扰信号进行抑制。本申请在获取干扰信号之前，先将本小区的接收信号进行信号消减，使用消减掉本小区的接收信号后的信号，通过联合邻小区调度信息对干扰进行估计，获取准确的干扰信号，在面对邻小区上行同频干扰有更好的抑制效果。

Description

一种抑制干扰信号的方法和装置 技术领域
本申请涉及通信技术，特别是涉及一种抑制干扰信号的方法和装置。
背景技术
长期演进(Long Term Evolution，LTE)系统在实际网络规划中，多采用同频组网方式，这样的系统内会产生同频干扰的问题。
目前在LTE接收机中，多采用上行干扰抑制合并算法(Interference Rejection Combining，IRC)对干扰进行抑制。一般性的IRC如下：
x＝(HHSH+C)-1HHSy；
其中x为均衡结果，y为天线信号，H为信道估计结果，
Figure PCTCN2016076159-appb-000001
而
Figure PCTCN2016076159-appb-000002
为NR×NR的干扰噪声协方差矩阵；
Figure PCTCN2016076159-appb-000003
为NT×NT的发射信号协方差矩阵，NR为接收天线数，NT为发射天线数，
IRC的关键在于取得较准确的信道估计结果H以及Cn，计算Cn的一般方法如下：
Figure PCTCN2016076159-appb-000004
其中Si为导频序列，且||Si||＝1；
由此可知，Cn可用初始信道估计结果(接收信号r除以导频序列Si)与用户i的信道估计结果Hi的差异来得到，即初始信道估计结果减去用户i的最终信道估计结果得到。
用户i的信道估计结果Hi通常通过对初始信道估计结果进行取窗去噪声得到。
如果接收到的数据中存在邻小区同频干扰，由于邻小区用户发射信号的导频位置也为Zadoff序列(即物理随机接入信道序列)，具备良好的自相关以及互相关特性，所以干扰在导频符号中呈现较离散状态，简单的取窗去噪不能获得较准确的信道估计结果H以及Cn。
所以也有联合检测算法对IRC进行改进，将邻小区的调度信息传输到主小区，在主小区将接收的天线信号使用邻小区的的小区参数以及调度进 行信道估计，最终得到的各用户的信道估计结果对主小区来说即为干扰。
由于LTE上行解调参考信道良好的相关特性，上述改进的联合检测算法相比传统的IRC算法，能获得更准确的信道估计以及干扰检测结果，但由于在实际环境中，本小区的信号可能比邻小区干扰高很多，采用联合检测的方法不能计算出准确的干扰。
发明内容
本申请提供一种抑制干扰信号的方法和装置，以解决获取的干扰不准确的问题。
为了解决上述问题，本申请公开了一种抑制干扰信号的方法，包括：
将本小区的接收信号进行信号消减；
通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号；
对所述精确干扰信号进行抑制。
优选地，所述通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号，包括：
通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号；
通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号。
优选地，所述通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号，包括：
将信号消减后的本小区的接收信号的导频符号与本小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的粗略信道频域响应信号；
对所述粗略信道频域响应信号进行离散傅里叶逆变换，得到粗略信道时域冲激响应信号；
对所述粗略信道时域冲激响应信号进行多用户分离和取窗去噪，得到粗略单用户时域冲激响应信号；
对所述粗略单用户时域冲激响应信号进行离散傅里叶变换，得到各用户的粗略信道估算结果；
将所述粗略信道频域响应信号与所述各用户的粗略信道估算结果相减，得到所述粗略干扰信号。
优选地，所述通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号，包括：
将所述粗略干扰信号与相邻小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的精确信道频域响应信号；
对所述精确信道频域响应信号进行离散傅里叶逆变换，得到精确信道时域冲激响应信号；
对所述精确信道时域冲激响应信号进行多用户分离和取窗去噪，得到精确单用户时域冲激响应信号；
对所述精确单用户时域冲激响应信号进行傅立叶变换，得到相邻小区的精确信道估算结果；
将所述粗略干扰信号与所述相邻小区的精确信道估算结果相减，得到所述精确干扰信号。
优选地，所述对所述精确干扰信号进行抑制，包括：
利用所述精确干扰信号进行上行干扰抑制合并检测，得到检测结果；
按照所述检测结果对所述精确干扰信号进行抑制。
本申请还公开了一种抑制干扰信号的装置，包括：
信号消减模块，设置为将本小区的接收信号进行信号消减；
信道估计模块，设置为通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号；
干扰抑制模块，设置为对所述精确干扰信号进行抑制。
优选地，所述信道估计模块，包括：
粗略干扰信号获取模块，设置为通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号；
精确干扰信号获取模块，设置为通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号。
优选地，所述粗略干扰信号获取模块，包括：
粗略信道频域响应信号获取模块，设置为将信号消减后的本小区的接收 信号的导频符号与本小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的粗略信道频域响应信号；
粗略信道时域冲激响应信号获取模块，设置为对所述粗略信道频域响应信号进行离散傅里叶逆变换，得到粗略信道时域冲激响应信号；
粗略单用户时域冲激响应信号获取模块，设置为对所述粗略信道时域冲激响应信号进行多用户分离和取窗去噪，得到粗略单用户时域冲激响应信号；
粗略信道估算结果获取模块，设置为对所述粗略单用户时域冲激响应信号进行离散傅里叶变换，得到各用户的粗略信道估算结果；
粗略干扰信号取得模块，设置为将所述粗略信道频域响应信号与所述各用户的粗略信道估算结果相减，得到所述粗略干扰信号。
优选地，所述精确干扰信号获取模块，包括：
精确信道频域响应信号获取模块，设置为将所述粗略干扰信号与相邻小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的精确信道频域响应信号；
精确信道时域冲激响应信号获取模块，设置为对所述精确信道频域响应信号进行离散傅里叶逆变换，得到精确信道时域冲激响应信号；
精确单用户时域冲激响应信号获取模块，设置为对所述精确信道时域冲激响应信号进行多用户分离和取窗去噪，得到精确单用户时域冲激响应信号；
精确信道估算结果获取模块，设置为对所述精确单用户时域冲激响应信号进行傅立叶变换，得到相邻小区的精确信道估算结果；
精确干扰信号取得模块，设置为将所述粗略干扰信号与所述相邻小区的精确信道估算结果相减，得到所述精确干扰信号。
优选地，所述干扰抑制模块，包括：
干扰检测模块，设置为利用所述精确干扰信号进行上行干扰抑制合并检测，得到检测结果；
精确干扰抑制模块，设置为按照所述检测结果对所述精确干扰信号进行抑制。
与背景技术相比，本申请包括以下优点：
在获取干扰信号之前，先将本小区的接收信号进行信号消减，使用消减掉本小区的接收信号后的信号，通过联合邻小区调度信息对干扰进行估计， 获取准确的干扰信号，在面对邻小区上行同频干扰有更好的抑制效果。
附图说明
图1为本申请实施例一中的一种抑制干扰信号的方法步骤流程图；
图2为本申请实施例二中的一种抑制干扰信号的方法步骤流程图；
图3为本申请实施例三中的一种抑制干扰信号的装置结构示意图；
图4为本申请实施例四中的一种抑制干扰信号的装置结构示意图。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本申请作进一步详细的说明。
下面通过列举几个具体的实施例详细介绍本申请提供的一种抑制干扰信号的方法和装置。
实施例一
详细介绍本申请实施例提供的一种抑制干扰信号的方法。
参照图1，示出了本申请实施例中一种抑制干扰信号的方法步骤流程图。
步骤100，将本小区的接收信号进行信号消减。
由于本小区的接收信号的干扰会比邻小区的干扰更加强烈，所以，先将本小区的接收信号进行信号消减操作。
具体对本小区的接收信号的消减标准或者消减程度可以根据实际情况设定，本申请实施例对本小区的接收信号的信号消减不做限制。
步骤102，通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号。
可以将邻小区的调度信息等传输到本小区，在本小区将接收到的天线信号使用邻小区的小区参数以及调度信息进行信道估计，得到精确干扰信号。需要说明的是，上述精确干扰信号是相对于现有技术中得到的干扰而言，更加精确的干扰信号。
步骤104，对所述精确干扰信号进行抑制。
综上所述，本申请技术方案在获取干扰信号之前，先将本小区的接收 信号进行信号消减，使用消减掉本小区的接收信号后的信号，通过联合邻小区调度信息对干扰进行估计，获取准确的干扰信号，在面对邻小区上行同频干扰有更好的抑制效果。
实施例二
详细介绍本申请实施例提供的一种抑制干扰信号的方法。
参照图2，示出了本申请实施例中一种抑制干扰信号的方法步骤流程图。
步骤200，将本小区的接收信号进行信号消减。
由于本小区的接收信号的干扰会比邻小区的干扰更加强烈，所以，先将本小区的接收信号进行信号消减操作。
具体对本小区的接收信号的消减标准或者消减程度可以根据实际情况设定，本申请实施例对本小区的接收信号的信号消减不做限制。
步骤202，通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号。
可以将邻小区的调度信息等传输到本小区，在本小区将接收到的天线信号使用邻小区的小区参数以及调度信息进行信道估计，得到精确干扰信号。
需要说明的是，上述精确干扰信号是相对于现有技术中得到的干扰而言，更加精确的干扰信号。
优选地，所述步骤202可以包括：
步骤2021，通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号。
优选地，所述步骤2021可以包括：
1)、将信号消减后的本小区的接收信号的导频符号与本小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的粗略信道频域响应信号。
2)、对所述粗略信道频域响应信号进行离散傅里叶逆变换，得到粗略信道时域冲激响应信号。
3)、对所述粗略信道时域冲激响应信号进行多用户分离和取窗去噪， 得到粗略单用户时域冲激响应信号。
4)、对所述粗略单用户时域冲激响应信号进行离散傅里叶变换，得到各用户的粗略信道估算结果。
5)、将所述粗略信道频域响应信号与所述各用户的粗略信道估算结果相减，得到所述粗略干扰信号。
例如，用户i的信道估计结果Hi通常通过对初始信道估计结果进行取窗去噪声得到，具体步骤为：
Step1：导频符号
Figure PCTCN2016076159-appb-000005
将与本地已知参考信号
Figure PCTCN2016076159-appb-000006
进行复数共轭乘，得到消除参考符号调制后的信道频域响应
Figure PCTCN2016076159-appb-000007
Step2：对
Figure PCTCN2016076159-appb-000008
进行离散傅里叶逆变换(Inverse Discrete Fourier Transform，IDFT)，得到信道的时域冲激响应
Figure PCTCN2016076159-appb-000009
Step3：对
Figure PCTCN2016076159-appb-000010
进行多用户分离，同时取窗去噪，得到取窗去噪后单用户的时域冲激响应
Figure PCTCN2016076159-appb-000011
Step4：对
Figure PCTCN2016076159-appb-000012
做离散傅里叶变换(Discrete Fourier Transform，DFT)，得到各用户的信道估计结果
Figure PCTCN2016076159-appb-000013
Step5：将
Figure PCTCN2016076159-appb-000014
得到粗略干扰信号
Figure PCTCN2016076159-appb-000015
步骤2022，通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号。
优选地，所述步骤2022可以包括：
6)、将所述粗略干扰信号与相邻小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的精确信道频域响应信号。
7)、对所述精确信道频域响应信号进行离散傅里叶逆变换，得到精确信道时域冲激响应信号。
8)、对所述精确信道时域冲激响应信号进行多用户分离和取窗去噪，得到精确单用户时域冲激响应信号。
9)、对所述精确单用户时域冲激响应信号进行傅立叶变换，得到相邻小区的精确信道估算结果。
10)、将所述粗略干扰信号与所述相邻小区的精确信道估算结果相减， 得到所述精确干扰信号。
例如，通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号的具体步骤为：
Step6：将粗略干扰信号
Figure PCTCN2016076159-appb-000016
与本地已知邻小区参考信号
Figure PCTCN2016076159-appb-000017
进行复数共轭乘，得到消除参考符号调制后的信道频域响应
Figure PCTCN2016076159-appb-000018
Step7：对
Figure PCTCN2016076159-appb-000019
进行IDFT，得到信道的时域冲激响应
Figure PCTCN2016076159-appb-000020
Step8：对
Figure PCTCN2016076159-appb-000021
进行多用户分离，同时取窗去噪，得到取窗去噪后单用户的时域冲激响应
Figure PCTCN2016076159-appb-000022
Step9：对
Figure PCTCN2016076159-appb-000023
做DFT，得到邻小区用户的信道估计结果
Figure PCTCN2016076159-appb-000024
Step10：将
Figure PCTCN2016076159-appb-000025
得到精确干扰信号
Figure PCTCN2016076159-appb-000026
需要说明的是，上述步骤2021中的粗略干扰信号是与步骤2022中的精确干扰信号相对而言的干扰信号，其中，粗略和精确均是相对的。
同理，上述1)——10)中的粗略和精确也是相对的。
步骤204，对所述精确干扰信号进行抑制。
优选地，所述步骤204可以包括：
步骤2041，利用所述精确干扰信号进行上行干扰抑制合并检测，得到检测结果。
对得到的精确干扰信号进行IRC检测，得到检测结果。
步骤2042，按照所述检测结果对所述精确干扰信号进行抑制。
综上所述，本申请技术方案在获取干扰信号之前，先将本小区的接收信号进行信号消减，使用消减掉本小区的接收信号后的信号，通过联合邻小区调度信息对干扰进行估计，获取准确的干扰信号，在面对邻小区上行同频干扰有更好的抑制效果。
实施例三
详细介绍本申请实施例提供的一种抑制干扰信号的装置。
参照图3，示出了本申请实施例中一种抑制干扰信号的装置结构示意 图。
所述装置可以包括：信号消减模块300，信道估计模块302，干扰抑制模块304。
下面分别详细介绍各模块的功能以及各模块之间的关系。
信号消减模块300，设置为将本小区的接收信号进行信号消减。
信道估计模块302，设置为通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号。
需要说明的是，上述精确干扰信号是相对于现有技术中得到的干扰而言，更加精确的干扰信号。
干扰抑制模块304，设置为对所述精确干扰信号进行抑制。
综上所述，本申请技术方案在获取干扰信号之前，先将本小区的接收信号进行信号消减，使用消减掉本小区的接收信号后的信号，通过联合邻小区调度信息对干扰进行估计，获取准确的干扰信号，在面对邻小区上行同频干扰有更好的抑制效果。
实施例四
详细介绍本申请实施例提供的一种抑制干扰信号的装置。
参照图4，示出了本申请实施例中一种抑制干扰信号的装置结构示意图。
所述装置可以包括：信号消减模块400，信道估计模块402，干扰抑制模块404。
其中，所述信道估计模块402可以包括：粗略干扰信号获取模块4021，精确干扰信号获取模块4022。
所述干扰抑制模块404可以包括：干扰检测模块4041，精确干扰抑制模块4042。
下面分别详细介绍各模块的功能以及各模块之间的关系。
信号消减模块400，设置为将本小区的接收信号进行信号消减。
信道估计模块402，设置为通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干 扰信号。
需要说明的是，上述精确干扰信号是相对于现有技术中得到的干扰而言，更加精确的干扰信号。
优选地，所述信道估计模块402可以包括：
粗略干扰信号获取模块4021，设置为通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号。
优选地，所述粗略干扰信号获取模块4021可以包括：
粗略信道频域响应信号获取模块，设置为将信号消减后的本小区的接收信号的导频符号与本小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的粗略信道频域响应信号。
粗略信道时域冲激响应信号获取模块，设置为对所述粗略信道频域响应信号进行离散傅里叶逆变换，得到粗略信道时域冲激响应信号。
粗略单用户时域冲激响应信号获取模块，设置为对所述粗略信道时域冲激响应信号进行多用户分离和取窗去噪，得到粗略单用户时域冲激响应信号。
粗略信道估算结果获取模块，设置为对所述粗略单用户时域冲激响应信号进行离散傅里叶变换，得到各用户的粗略信道估算结果。
粗略干扰信号取得模块，设置为将所述粗略信道频域响应信号与所述各用户的粗略信道估算结果相减，得到所述粗略干扰信号。
精确干扰信号获取模块4022，设置为通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号。
优选地，所述精确干扰信号获取模块4022可以包括：
精确信道频域响应信号获取模块，设置为将所述粗略干扰信号与相邻小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的精确信道频域响应信号。
精确信道时域冲激响应信号获取模块，设置为对所述精确信道频域响应信号进行离散傅里叶逆变换，得到精确信道时域冲激响应信号。
精确单用户时域冲激响应信号获取模块，设置为对所述精确信道时域冲激响应信号进行多用户分离和取窗去噪，得到精确单用户时域冲激响应信号。
精确信道估算结果获取模块，设置为对所述精确单用户时域冲激响应信号进行傅立叶变换，得到相邻小区的精确信道估算结果。
精确干扰信号取得模块，设置为将所述粗略干扰信号与所述相邻小区的精确信道估算结果相减，得到所述精确干扰信号。
干扰抑制模块404，设置为对所述精确干扰信号进行抑制。
优选地，所述干扰抑制模块404可以包括：
干扰检测模块4041，设置为利用所述精确干扰信号进行上行干扰抑制合并检测，得到检测结果。
精确干扰抑制模块4042，设置为按照所述检测结果对所述精确干扰信号进行抑制。
综上所述，本申请技术方案在获取干扰信号之前，先将本小区的接收信号进行信号消减，使用消减掉本小区的接收信号后的信号，通过联合邻小区调度信息对干扰进行估计，获取准确的干扰信号，在面对邻小区上行同频干扰有更好的抑制效果。
所述计算机可读记录介质包括用于以计算机(例如计算机)可读的形式存储或传送信息的任何机制。例如，机器可读介质包括只读存储器(ROM)、随机存取存储器(RAM)、磁盘存储介质、光存储介质、闪速存储介质、电、光、声或其他形式的传播信号(例如，载波、红外信号、数字信号等)等。
对于装置实施例而言，由于其与方法实施例基本相似，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对 其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (11)

  1. 一种抑制干扰信号的方法，其特征在于，包括：
    将本小区的接收信号进行信号消减；
    通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号；
    对所述精确干扰信号进行抑制。
  2. 根据权利要求1所述的方法，其特征在于，所述通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号，包括：
    通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号；
    通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号。
  3. 根据权利要求2所述的方法，其特征在于，所述通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号，包括：
    将信号消减后的本小区的接收信号的导频符号与本小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的粗略信道频域响应信号；
    对所述粗略信道频域响应信号进行离散傅里叶逆变换，得到粗略信道时域冲激响应信号；
    对所述粗略信道时域冲激响应信号进行多用户分离和取窗去噪，得到粗略单用户时域冲激响应信号；
    对所述粗略单用户时域冲激响应信号进行离散傅里叶变换，得到各用户的粗略信道估算结果；
    将所述粗略信道频域响应信号与所述各用户的粗略信道估算结果相减，得到所述粗略干扰信号。
  4. 根据权利要求3所述的方法，其特征在于，所述通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号，包括：
    将所述粗略干扰信号与相邻小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的精确信道频域响应信号；
    对所述精确信道频域响应信号进行离散傅里叶逆变换，得到精确信道时域冲激响应信号；
    对所述精确信道时域冲激响应信号进行多用户分离和取窗去噪，得到精确单用户时域冲激响应信号；
    对所述精确单用户时域冲激响应信号进行傅立叶变换，得到相邻小区的精确信道估算结果；
    将所述粗略干扰信号与所述相邻小区的精确信道估算结果相减，得到所述精确干扰信号。
  5. 根据权利要求1所述的方法，其特征在于，所述对所述精确干扰信号进行抑制，包括：
    利用所述精确干扰信号进行上行干扰抑制合并检测，得到检测结果；
    按照所述检测结果对所述精确干扰信号进行抑制。
  6. 一种抑制干扰信号的装置，其特征在于，包括：
    信号消减模块，设置为将本小区的接收信号进行信号消减；
    信道估计模块，设置为通过所述本小区的参考信号和相邻小区的参考信号，对信号消减后的本小区的接收信号进行信道估计，得到精确干扰信号；
    干扰抑制模块，设置为对所述精确干扰信号进行抑制。
  7. 根据权利要求6所述的装置，其特征在于，所述信道估计模块，包括：
    粗略干扰信号获取模块，设置为通过所述本小区的参考信号对信号消减后的本小区的接收信号进行信道估计，得到粗略干扰信号；
    精确干扰信号获取模块，设置为通过所述相邻小区的参考信号对所述粗略干扰信号进行信道估计，得到精确干扰信号。
  8. 根据权利要求7所述的装置，其特征在于，所述粗略干扰信号获取模块，包括：
    粗略信道频域响应信号获取模块，设置为将信号消减后的本小区的接收信号的导频符号与本小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的粗略信道频域响应信号；
    粗略信道时域冲激响应信号获取模块，设置为对所述粗略信道频域响应信号进行离散傅里叶逆变换，得到粗略信道时域冲激响应信号；
    粗略单用户时域冲激响应信号获取模块，设置为对所述粗略信道时域冲 激响应信号进行多用户分离和取窗去噪，得到粗略单用户时域冲激响应信号；
    粗略信道估算结果获取模块，设置为对所述粗略单用户时域冲激响应信号进行离散傅里叶变换，得到各用户的粗略信道估算结果；
    粗略干扰信号取得模块，设置为将所述粗略信道频域响应信号与所述各用户的粗略信道估算结果相减，得到所述粗略干扰信号。
  9. 根据权利要求8所述的装置，其特征在于，所述精确干扰信号获取模块，包括：
    精确信道频域响应信号获取模块，设置为将所述粗略干扰信号与相邻小区的参考信号进行复数共轭相乘，得到消除参考信号调制后的精确信道频域响应信号；
    精确信道时域冲激响应信号获取模块，设置为对所述精确信道频域响应信号进行离散傅里叶逆变换，得到精确信道时域冲激响应信号；
    精确单用户时域冲激响应信号获取模块，设置为对所述精确信道时域冲激响应信号进行多用户分离和取窗去噪，得到精确单用户时域冲激响应信号；
    精确信道估算结果获取模块，设置为对所述精确单用户时域冲激响应信号进行傅立叶变换，得到相邻小区的精确信道估算结果；
    精确干扰信号取得模块，设置为将所述粗略干扰信号与所述相邻小区的精确信道估算结果相减，得到所述精确干扰信号。
  10. 根据权利要求6所述的装置，其特征在于，所述干扰抑制模块，包括：
    干扰检测模块，设置为利用所述精确干扰信号进行上行干扰抑制合并检测，得到检测结果；
    精确干扰抑制模块，设置为按照所述检测结果对所述精确干扰信号进行抑制。
  11. 一种在其上记录有用于执行权利要求1所述方法的程序的计算机可读记录介质。
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