CN103457630B - An interference signal amplitude in the complex domain estimation method and apparatus - Google Patents

An interference signal amplitude in the complex domain estimation method and apparatus Download PDF

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CN103457630B
CN103457630B CN 201310355133 CN201310355133A CN103457630B CN 103457630 B CN103457630 B CN 103457630B CN 201310355133 CN201310355133 CN 201310355133 CN 201310355133 A CN201310355133 A CN 201310355133A CN 103457630 B CN103457630 B CN 103457630B
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signal
amplitude
interference
value
interference signal
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CN103457630A (en )
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周智勋
田华
周明宇
梁尧
胥小武
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深圳清华大学研究院
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Abstract

一种复数域下的干扰信号幅度估计方法,包括如下步骤:提供一离散的观测信号,其中,所述观测信号包括所述干扰信号及一有用信号;估计离散的观测信号中的干扰信号的幅度值;根据计算出的干扰信号的幅度值,从观测信号中去除所述干扰信号,从而得到一个不包括所述干扰信号的中间信号;从所述中间信号中解调出所述有用信号;估计解调出的所述有用信号的幅度值;根据计算出的所述干扰信号及有用信号的幅度值计算误差扰动参量;判断所述误差扰动参量是否小于一门限值;以及当所述误差扰动参量小于所述门限值时输出估计的所述干扰信号的幅度值。 Interference signal amplitude estimation method in a complex domain, comprising the steps of: providing a discrete observation signal, wherein said observed signal and said interference signal comprises a useful signal; estimating an interference signal amplitude discrete signal observed value; the amplitude value calculated interference signal is removed from the observation signal in the interfering signal to obtain an intermediate signal including the interference signal; demodulating the useful signal from said intermediate signal; estimating the amplitude value of the demodulated useful signal; calculating an error value of the disturbance variable amplitude according to the calculated interference signal and a desired signal; determining whether the error is smaller than a disturbance variable threshold value; and when the disturbance error the amplitude value of the interference signal output when the estimated quantity is smaller than the threshold value. 本发明还涉及一种干扰信号幅度估计装置。 The present invention further relates to an interference signal amplitude estimation means.

Description

一种复数域下的干扰信号幅度估计方法及装置 An interference signal amplitude in the complex domain estimation method and apparatus

技术领域 FIELD

[0001] 本发明涉及通信系统中两路信号混叠后的干扰消除技术,尤其涉及复数域下的干扰信号的幅度估计方法及装置。 [0001] The present invention relates to a communication system, the interference of two signals aliasing cancellation technology, and particularly relates to a method and apparatus for estimating the amplitude of an interference signal in the complex domain.

背景技术 Background technique

[0002] 在无线通信的一些应用场景中,两个站点之间由于距离或地理环境的限制无法直接进行通信,必须利用中继站来进行信号的转发和放大。 [0002] In some application scenarios of a wireless communication, the distance between two restriction sites or because of geographical environment can not communicate directly, using a relay station to be forwarded and the amplified signal. 为了提高频谱利用率及信息的抗截获水平,通常还需要相互通信的两个站点所发射的信号在时域、频域甚至码空间上完全重叠。 In order to improve spectral efficiency and the level of anti-interception of information, usually requires two sites communicate with each signal being transmitted in the time domain, the frequency domain code space even completely overlap.

[0003] 通信时,双方站点分别在相同时间向中继站发送相同频率的上行信号,在中继上叠加,经过中继的下变频和功率放大以后,两个站点均可接收到由本地信号成分(即干扰信号)与对方信号成分(即有用信号)组成的下行混合信号。 [0003] When the communication station both at the same time are transmitted to the relay station uplink signal of the same frequency, is superimposed on the relay, after the power of the relay downconvert, and after amplification, two sites can be received by the local signal component ( i.e. interfering signal in the downlink signal mixed with the other signal component (i.e., the useful signal) component). 由于每个站点都确切知道自己所发送的信息以及本地收发的信号处理过程,因此能够对混合信号中的本地信号成分(干扰信号)作出较为有效的估计。 Since each site knows exactly signal processing information and its own local transceiver is transmitted, it is possible to make more effective estimation of the local signal component (interference signal) of the mixed signal. 将这部分信号作为干扰信号从混合下行信号中消除以后,即可实现对对方信号成分(有用信号)的可靠解调。 After elimination of the downlink signal from this part of the mixed signal as an interference signal, can be realized reliably demodulated other signal component (the desired signal) is. 这样,即使双方信号在时域、频域、码空间上完全重叠,链路对称时的信道资源利用率也可以提高一倍。 Thus, even if both the signal completely overlap in the time domain, frequency domain, code space, the channel link when the resource utilization may be double symmetrical.

[0004] 为了能够将干扰信号尽可能地消除,站点采用的接收机就需要在信号解调器的前端增加一系列的参数估计模块。 [0004] In order to eliminate possible interference signals, the receiver uses the site number of parameters need to increase the front-end signal estimation module in the demodulator. 待估计的参数包括干扰信号的时延、频偏、相位、幅度等等。 Parameters to be estimated interference signal comprises a time delay, frequency, phase, amplitude and the like. 这些参数的估计精准与否将直接影响到有用信号能否被正确解调,因此成为这一类通信应用场景下的最关键技术。 Accurate estimation of these parameters directly affects the useful signal can be demodulated correctly, the key technologies become in this type of communication scenarios. 为了实现混合信号的分离,一般采用广义相关法来消除干扰信号的影响。 In order to achieve separation of mixed signals, generally generalized correlation method to eliminate the influence of the interference signal. 然而传统的广义相关法的幅度估计在实数域进行,且迭代次数较多,不利于工程实现。 However, the magnitude of the traditional generalized correlation method estimates the real number field, and more iterations, is not conducive to project implementation.

发明内容 SUMMARY

[0005] 针对上述问题,有必要提供一种运用于复数域的能有效减少迭代过程的干扰信号幅度估计方法。 [0005] In view of the above problems, it is necessary to provide interference signal amplitude can effectively reduce the iteration process a plurality of domain estimation method used.

[0006] 另外,还有必要提供一种运用于复数域的能有效减少迭代过程的干扰信号幅度估计装置。 [0006] Further, there is need to provide a complex field applied to the iterative process can effectively reduce the amplitude of the interference signal estimation means.

[0007] -种复数域下的干扰信号幅度估计方法,包括如下步骤: [0007] - the amplitude of the interference signal in the complex domain estimation method species, comprising the steps of:

[0008] 接收一混合信号; [0008] receiving a mixed signal;

[0009] 根据所述混合信号采样得到一离散的观测信号,其中,所述观测信号包括所述干扰信号、一有用信号及一噪声信号; [0009] to obtain a signal according to the observation of discrete samples mixed signal, wherein said signal comprises observing the interference signal, a desired signal and a noise signal;

[0010] 估计离散的观测信号中的干扰信号的幅度值; [0010] estimated value of the interference signal amplitude discrete observation signal;

[0011] 根据计算出的干扰信号的幅度值,从观测信号中去除所述干扰信号,从而得到一个不包括所述干扰信号的中间信号; [0011] The calculated value of the amplitude of the interference signal is removed from the observation signal in the interfering signal to obtain an intermediate signal including the interfering signal;

[0012] 从所述中间信号中解调出所述有用信号; [0012] The demodulated useful signal from said intermediate signal;

[0013] 估计解调出的所述有用信号的幅度值; [0013] Estimated value of the amplitude of the demodulated useful signal;

[0014] 根据计算出的所述干扰信号及有用信号的幅度值计算误差扰动参量; [0014] The calculating an error parameter perturbation amplitude value of the calculated interference signal and the wanted signal;

[0015] 判断所述误差扰动参量是否小于一门限值;以及 [0015] It is determined whether the error is smaller than a disturbance variable threshold value; and

[0016] 当所述误差扰动参量小于所述门限值时输出估计的所述干扰信号的幅度值。 The amplitude value of the interference signal [0016] output of the error estimated when the disturbance variable is smaller than the threshold value.

[0017] -种复数域下的干扰信号幅度估计装置,包括: [0017] - the amplitude of the interference signal in the complex domain estimation device types, comprising:

[0018] 信号接收模块,用于接收一混合信号; [0018] The signal receiving means for receiving a mixed signal;

[0019] 采样模块,用于根据所述混合信号采样得到一离散的观测信号,其中,所述观测信号包括所述干扰信号及一有用信号; [0019] The sampling module for obtaining a discrete signal according to the observed mixing signal samples, wherein the said observation signal comprising a useful signal and interfering signals;

[0020] 第一计算模块,用于估计离散的观测信号中的干扰信号的幅度值; [0020] The first calculation module, discrete amplitude value of the interference signal in the observation signal for estimation;

[0021] 第二计算模块,用于根据计算出的干扰信号的幅度值,从观测信号中去除所述干扰信号,从而得到一个不包括所述干扰信号的中间信号; [0021] The second calculation module for calculating the amplitude value of the interference signal, removing the interference signal from the observation signal so as to obtain an intermediate signal including the interfering signal;

[0022] 解调模块,用于从所述中间信号中解调出所述有用信号; [0022] demodulating means for demodulating the useful signal from said intermediate signal;

[0023] 第三计算模块,用于估计解调出的所述有用信号的幅度值; [0023] The third computing means for estimating the amplitude value of the demodulated useful signal;

[0024] 第四计算模块,用于根据计算出的所述干扰信号及有用信号的幅度值计算误差扰动参量; [0024] a fourth calculating means for calculating an error value of the disturbance variable amplitude according to the calculated interference signal and the wanted signal;

[0025] 判断模块,用于判断所述误差扰动参量是否小于一门限值;以及 [0025] The determination module configured to determine the disturbance parameter error is smaller than a threshold value; and

[0026] 输出模块,用于当所述误差扰动参量小于所述门限值时输出估计的所述干扰信号的幅度值。 The amplitude value of the interference signal when the output estimation [0026] an output module for the disturbance variable when the error is smaller than the threshold value.

[0027] 所述的干扰信号幅度估计方法及装置可以根据预设门限值决定是否进行迭代,有效减少了迭代次数,在满足精度要求的前提下快速准确地输出干扰信号的幅度估计值,从而在观测点有限的情况下显著改善干扰信号幅度估计的精度,更加符合实际的工程处理情形。 The interference of the [0027] signal amplitude estimation method and apparatus in accordance with a preset threshold value can be determined whether the iteration, effectively reducing the number of iterations, rapid and accurate estimate of the interference amplitude of the output signal in meeting the accuracy requirements, thereby observation points in limited circumstances significantly improve the accuracy of the interference signal amplitude estimate, more realistic engineered situation.

附图说明 BRIEF DESCRIPTION

[0028] 图1为使用本发明较佳实施方式的干扰信号幅度估计方法及装置的通信系统的示意图。 A schematic view of a communication system method and apparatus [0028] FIG. 1 is a preferred embodiment of the present invention using the embodiment of the interference signal amplitude estimation.

[0029] 图2为本发明较佳实施方式的干扰信号幅度估计方法的流程图。 Interference signal amplitude flowchart of a method [0029] FIG 2 a preferred embodiment of the present invention estimates.

[0030] 图3为本发明较佳实施方式的干扰信号幅度装置的功能模块图。 [0030] FIG 3 a block diagram of the interference signal amplitude preferred embodiment of the apparatus of the present invention.

[0031] 主要元件符号说明 [0031] Main reference numerals DESCRIPTION

[0032] [0032]

Figure CN103457630BD00061

Figure CN103457630BD00071

[0033] 如下具体实施方式将结合上述附图进一步说明本发明。 [0033] The following specific embodiments in conjunction with the accompanying drawings, the present invention is described.

具体实施方式 detailed description

[0034] 本发明较佳实施方式的干扰信号幅度估计方法及装置应用于一无线通信系统,用于对复数域下的干扰信号的幅度进行估计。 Interference signal amplitude [0034] preferred embodiment of the present invention a method and apparatus for estimation is applied to a wireless communication system, for the amplitude of the interference signal in the complex domain estimation.

[0035] 首先,对本发明使用的各种符号、函数及公式等进行定义及说明。 [0035] First, symbols, and other functions and formulas of the present invention will be defined and described.

[0036] 对于复数普,#代表取曼的共辄,代表取的实部,·代表取ί的虚部,fej代表对Z进行求模运算, [0036] For a plurality of P, # represents taking a total Man Noir, representative of the real part imaginary part taken, take ί The representative, the representative Z fej of modulo arithmetic,

Figure CN103457630BD00072

[0037] 对于实数X,函数/(X) = S魯代表对I进行符号判别。 [0037] For real number X, the function / (X) = I represents S to Lu symbols for discrimination. 洋大于〇,输出1 ;來小于〇,输出-I y等于〇,输出〇。 Yang greater than square, output 1; billion to less than, equal to -I y billion output, the output square.

[0038] 请参阅图1,本发明较佳实施方式的干扰信号幅度估计方法及装置应用于一无线通信系统1〇〇,其包括站点A、站点B以及中继站C。 [0038] Referring to FIG. 1, the interference signal amplitude estimation method and apparatus of the present invention is applied to a preferred embodiment of a wireless communication system 1〇〇, including Site A, Site B, and the relay station C. 中继站C用于转发及放大站点A及站点B发送的信号。 C for forwarding relay station and amplifying Site A and Site B transmitted signals. 具体地,当站点A与站点B之间需要通信时,站点A与站点B分别在相同的时间向中继站C发送相同频率的信号。 Specifically, when the need for communication between the site A and the site B, site A and site B are the same frequency of the transmission signal C to the relay stations at the same time. 例如,设站点A输出的信号为;站点B输出的信号为QU)。 For example, site A signal output is provided; Site B output signal is QU). 中继站C将站点A与站点B发送的信号进行叠加,形成一混合信号KO,并对所述混合信号Ki)进行频率转换及功率放大,再分别输出至站点A及站点B。 The relay station C and station A to station B transmits a signal will be superimposed, KO form a mixed signal, the mixed signal and Ki) performs frequency conversion and power amplification, and then outputted respectively to the site A and site B. 也就是说,中继站C仅对混合信号ifi进行频率转换及功率放大,即,完成透明转发功能,而不对混合信号KO做其他信号处理。 That is, only the mixed signal relay C ifi frequency conversion and power amplification, i.e., to make a transparent forwarding, do not mixed signal KO other signal processing. 如此,站点A不仅会接收到来自站点B经过中继站C转发的信号,此时S2(X)相对于站点A为有用信号,还会接收到来自站点A自身的经过中继站C转发的信号5©,此时5^相对于站点A为干扰信号。 Thus, station A will not only receive the signal via the relay station C forwarded from station B, at this time S2 (X) relative to the site A is a useful signal, also receives the signal through the relay station C forwarded from station A itself 5 ©, At this time, relative to the site 5 ^ A as an interference signal. 同样地,站点B不仅会接收到来自站点A经过中继站C转发的信号,此时相对于站点B为有用信号,还会接收到来自站点B自身的经过中继站C转发的信号今傷:,此时%_相对于站点B为干扰信号。 Likewise, Site B not only receives a signal through the A site forwarded from the relay station C, then station B with respect to the useful signal, also received via its C relay station forwards signals from this injury site B: At this time % _ B sites with respect to the interfering signal.

[0039] 无论站点A或者站点B哪一方作为观测站,若需在本地正确解调出有用信号的信息,则需首先估计出本地自身所发射出去的经过中继站C转发的干扰信号的各项参数,包括时延、频偏、相移、幅度等等。 [0039] Whether or Site A Site B as one of the stations which, properly demodulated information helpful For the local signal, first need to estimate the local interference signal itself emitted through the relay station forwards the parameters C They include delay, frequency offset, phase, amplitude and the like. 本发明仅关注干扰信号的幅度估计方法,并且假定在实施本发明所提出的幅度估计方法之前,系统的接收端已经做好了干扰信号其余各项参数的相应补偿。 The present invention is concerned only with the amplitude of the interference signal estimation method, and it is assumed in the prior embodiment the amplitude estimation method proposed by the present invention, the receiving end of the system has already done the interference signals corresponding to the rest of the compensation parameters.

[0040] 请结合参阅图2,下面以站点A为例对本发明的干扰信号幅度估计方法进行说明。 [0040] Please refer to FIG. 2 in conjunction with, the site A as an example below to the amplitude of the interference signal estimation method of the present invention will be described.

[0041] 步骤Sl :接收中继站C发送的混合信号KO。 [0041] Step Sl: receiving a mixed signal C transmitted by the relay station KO. KO表示为: KO expressed as:

[0042] [0042]

Figure CN103457630BD00073

[0043] 其中,巧⑷和巧⑷分别为相对于站点A的干扰信号和有用信号的波形,均值为0, 方差为1,且统计独立;ΐ;和'分别为干扰信号和有用信号的幅度;为噪声信号。 [0043] wherein, Qiao ⑷ and Qiao ⑷ respectively, relative to the site waveform of the interference signal and the useful signal A is zero mean, unit variance, and the statistical independence; ΐ; and 'were an interference signal and the wanted signal amplitude ; a noise signal.

[0044] 步骤S2 :对经过匹配滤波器(图未示)处理的混合信号作)进行采样,以得到离散观测信号模型。 [0044] Step S2: After the mixed signal as a matched filter (not shown) of the process) is sampled to obtain discrete observation signal model. 在本实施方式中,采用符号率采样,即采样间隔为符号周期T的采样。 In the present embodiment, using the symbol rate sampling, the sampling interval of the sampling period T symbol. 离散观测信号1表示为: Discrete observation signal 1 is expressed as:

[0045] [0045]

Figure CN103457630BD00081

[0046] 其中,以及:;%分别表不干扰信号、有用信号jV i 1以及噪声信号按照符号率采样所得样本。 [0046] where, and:;% do not interfere with signals respectively represent useful signal jV i 1 and a noise signal samples obtained in accordance with the symbol rate sample.

[0047] 当=Z办时,站点A与站点B发送的信号一般使用相同的调制方式,比如%;、S2it均使用双相相移键控(Binary Phase Shift Keying,BPSK)调制,或者均使用正交相移键控(Quadrature Phase Shift Keying, QPSK)调制,此时站点A与站点B的通信模式称为对称模式; [0047] When run = Z, Site A and Site B signal is typically transmitted using the same modulation scheme, such as the use of both bipolar% ;, S2it phase shift keying (Binary Phase Shift Keying, BPSK) modulation, or both using quadrature phase shift keying (quadrature phase shift keying, QPSK) modulation, when the communication station a and the site B mode called symmetric mode;

[0048] 当丨远大于各时,A、B两点发送的信号可以使用不同的调制方式,比如^:采用QPSK调制,@【采用BPSK调制,此时站点A与站点B的通信模式称为非对称模式。 [0048] Shu much larger than when the respective time, A, B signals may be transmitted using two different modulation schemes, such as ^: QPSK modulation, BPSK modulation is [@, station A and at this time the communication mode is referred to as site B asymmetric mode.

[0049] if % N sM^•者均为BPSK彳目号,则1、命以及^.均是实数; . [0049] if% N sM ^ • who are BPSK left foot mesh number, 1, and ^ life are real numbers;

[0050] 若,、邮其中一个为BPSK信号,另一个为QPSK信号,则4为复数; [0050] If the postal ,, wherein is a BPSK signal, a QPSK signal to the other, the complex is 4;

[0051] 若今:、@二者均为QPSK信号,则ϋ以及,:均是复数。 [0051] If today: both are @ QPSK signal, and then ϋ,: are complex.

[0052] 由于本发明将幅度估计方法从实数域拓展至复数域,因此不仅适用于对称模式也适用于非对称模式。 [0052] Since the estimation method of the present invention to expand the amplitude domain to a plurality of real number domain, therefore applied not only to the symmetrical mode is also applicable to an asymmetrical pattern.

[0053] 步骤S3 :从离散观测信号化中取一组观测数据,利用相关运算首次估计出干扰信号的幅度值: [0053] Step S3: taking data from a set of observations of discrete observation signal, the first correlation calculation using the estimated value of the interference signal amplitude:

[0054] [0054]

Figure CN103457630BD00082

[0055] 其中,况为观测长度,:¾:从1取到灰。 [0055] wherein, as the observation length condition,: ¾: take from 1 to ash. 对于两个复数符号^和%,相关运算是指夺乘以巧.的共辄,即ϋ:。 For two complex symbols ^ and% multiplied by the correlation calculation means clever wins. Co Noir, i.e. ϋ :. 因此,:¾卷表示%与.的相关运算,即6 '治:_。 Thus,: ¾% volume represents the correlation operation, i.e., 6 'rule: _.

[0056] 步骤S4 :根据计算出的干扰信号的幅度值,从观测信号^中去除所述干扰信号, 从而得到一个不包括所述干扰信号的中间信号其中, [0056] Step S4: The value of the calculated amplitude of the interference signal, the interference signal is removed from the observation ^ signal, thereby obtaining an intermediate signal including the interfering signal wherein

[0057] [0057]

Figure CN103457630BD00083

[0058] 步骤S5 :从中间信号^中解调出有用信号。 [0058] Step S5: demodulated useful signal from the intermediate signal ^. 在本实施方式中,采用硬判决解调方式来解调有用信号。 In the present embodiment, the hard decision demodulation to demodulate the desired signal. 在实际通信中,站点A与站点B发送的信号的调解方式可以相同,也可以不同。 In actual communications, mediation signal A and Site B Site transmitted it may be the same or different. 因此,根据有用信号的调制方式的不同,其解调方式也相应不同: Thus, depending on the modulation of the useful signal, which demodulation vary accordingly:

Figure CN103457630BD00091

[0061] 值得说明的是,无论站点A与站点B的调制方式是否相同,本发明均假设二者发送信号的调制方式在通信前就已经确定。 [0061] It should be noted that, regardless of the site A and the site B is the same modulation scheme, the modulation scheme of the present invention, assume that both the transmission signal has been determined prior to the communication. 也就是说,站点A已确定站点B即将发送的有用信号的调制方式,因此在步骤S5中只需采用相应的解调方式解调即可。 That is, the determined modulation scheme Site A Site B the useful signal to be sent, and therefore only employed in step S5 corresponding to the demodulated demodulation. 此外,在本步骤中,由于根据有用信号的不同调制方式采用不同的解调方式,使得本发明的干扰信号幅度估计方法不仅可实现对两路相叠加的纯复数信号或者纯实数信号的有效分离,同时也可以实现对一路实数信号与一路复数信号相叠加的混合信号的有效分离。 Further, in this step, since the different demodulation scheme depending on the modulation scheme of the useful signal, so that the interference signal amplitude estimation method of the present invention not only allows for efficient separation of a pure complex signal or a real signal of two superposed , and also can be an effective way to separate the mixed signal with the real signal along a plurality of superposed signal.

[0062] 步骤S6 :利用相关运算估计解调出的有用信号的幅度值:卷: [0062] Step S6: correlation operation using the estimated amplitude value of the demodulated useful signal: Volume:

[0063] [0063]

Figure CN103457630BD00092

[0064] 步骤S7 :根据计算出的干扰信号的幅度值及有用信号的幅度值计算误差扰动参量:厶' : [0064] Step S7: calculating an error value of the disturbance variable amplitude according to the magnitude of the calculated value of the interference signal and a desired signal: Si ':

[0065] [0065]

Figure CN103457630BD00093

[0066] 步骤S8 :判断误差扰动参量厶是否小于门限值尽。 [0066] Step S8: the disturbance variable determination error is smaller than the threshold value do Si. 若是,则执行步骤S9 ;否则执行步骤SlO。 If yes, proceed to step S9; if not, step SlO.

[0067] 步骤S9 :输出通过估计得到的干扰信号幅度值。 [0067] Step S9: the interference by estimating the value of the output signal amplitude is obtained.

[0068] 步骤SlO :按照以下的公式再次估计干扰信号的幅度值,并返回步骤S4。 [0068] Step SlO: the following formula to estimate the amplitude of the interfering signal again, and returns to step S4.

[0069] [0069]

Figure CN103457630BD00094

[0070] 请参阅图3,本发明较佳实施方式的干扰信号幅度估计装置10包括信号接收模块11、采样模块12、第一计算模块13、第二计算模块14、解调模块15、第三计算模块16、第四计算模块17、判断模块18以及输出模块19。 [0070] Referring to FIG. 3, the interference signal amplitude preferred embodiment of the present invention the estimating means 10 includes a signal receiving module 11, a sampling module 12, a first calculation module 13, a second calculation module 14, a demodulation module 15, a third calculation module 16, a fourth calculation module 17, a determining module 18 and an output module 19.

[0071] 信号接收模块11用于接收中继站C发送的混合信号Γ__。 [0071] The signal reception module 11 for receiving a mixed signal C transmitted by the relay station Γ__. 表示为: Expressed as:

[0072] [0072]

Figure CN103457630BD00095

[0073] 采样模块12用于对经过匹配滤波器处理的混合信号Γ©进行采样,以得到离散观测信号模型。 [0073] The sampling module 12 for the matched filter processing Γ © mixed signal is sampled to obtain discrete observation signal model. 在本实施方式中,采用符号率采样,即采样间隔为符号周期T的采样。 In the present embodiment, using the symbol rate sampling, the sampling interval of the sampling period T symbol. 离散观测信号%表示为: Discrete observation signal% expressed as:

[0074] [0074]

Figure CN103457630BD00101

[0075] 第一计算模块13从离散观测信号%中取一组观测数据,利用相关运算首次估计出干扰信号的幅度值篆: [0075] The first calculation module 13 takes data from a set of observed discrete% observation signal, the first correlation calculation using the estimated value of the amplitude of the interference signal seal:

[0076] [0076]

Figure CN103457630BD00102

[0077] 其中,况为观测长度,女_从1取到Ar。 [0077] wherein, the length of the observation conditions is female _ take from 1 to Ar. ^^表示1:与%的相关运算,即。 ^^ 1 represents: a correlation calculation%, i.e..

[0078] 第二计算模块14用于根据计算出的所述干扰信号的幅度值,从观测信号仏中去除所述干扰信号,从而得到一个中间信号德。 [0078] 14 for calculating a second amplitude value of the interference signal is calculated according to the module, removing the interference signal from the observation signal Fo, thereby obtaining an intermediate signal de. 其中,< 。 Where <.

[0079] 解调模块15用于从中间信号·^中解调有用信号。 [0079] The demodulation module 15 for demodulating the useful signal from the intermediate signal which in ^. 在本实施方式中,采用硬判决解调方式来解调有用信号。 In the present embodiment, the hard decision demodulation to demodulate the desired signal. 在实际通信中,站点A与站点B发送的信号的调解方式可以相同, 也可以不同。 In actual communications, mediation signal A and Site B Site transmitted it may be the same or different. 因此,根据有用信号的调制方式的不同,其解调方式也相应不同: Thus, depending on the modulation of the useful signal, which demodulation vary accordingly:

Figure CN103457630BD00103

[0080] 若勺*::为BPSK信号,则 [0080] When the spoon is * :: BPSK signal,

[0081] 若%: Aqpsk信号,则其中,为虚~ j:. 数单位,即 [0081] When the%: Aqpsk signal, wherein an imaginary ~ j :. number of units, i.e.,

[0082] 第三计算模块16用于利用相关运算估计解调出的有用信号的幅度值r: [0082] The third amplitude value r calculated for the desired signal using a correlation calculation module 16 estimates the demodulated:

[0083] [0083]

Figure CN103457630BD00104

[0084] 第四计算模块17用于根据计算出的干扰信号的幅度值及有用信号的幅度值计算误差扰动参量:編: [0084] The fourth error calculation module 17 for calculating the disturbance variable in amplitude value of the amplitude value calculated by the interference signal and the useful signal: L:

[0085] [0085]

Figure CN103457630BD00105

[0086] 判断模块18用于判断误差扰动参量Δ是否小于门限值弩。 [0086] Error determination module 18 configured to determine the disturbance parameter is smaller than the threshold value Δ crossbow.

[0087] 输出模块19用于在判断模块18判断出所述扰动参量:Λ.小于门限值:_寸,输出计算的所述干扰信号的幅度值。 [0087] In the output module 19 for determining module 18 determines that the disturbance variables: Lambda less than the threshold: _ inch, the amplitude value of the interference signal output calculated.

[0088] 第一计算模块13还用于在所述扰动参量4大于门限值東时按照以下的公式: [0088] The first calculating module 13 is further configured according to the following formula when the disturbance variable threshold value is greater than 4 East:

Figure CN103457630BD00106

再次估计干扰信号的幅度值,此时所述第二计算模块14、解调模块15、第三计算模块16以及第四计算模块17则根据则根据重新计算出的干扰信号的幅度值重新进行相应的操作,直至误差扰动参量么小于门限值芩。 Estimate the amplitude of the interfering signal again, this time the second calculation module 14, a demodulation module 15, a third and a fourth calculation module 16 according to the calculation module 17 according to the corresponding amplitude value again recalculated interference signal operation, the disturbance parameters until the error is less than the threshold value it baicalensis.

[0089] 所述的干扰信号幅度估计方法及装置可以根据预设门限值决定是否进行迭代,有效减少了迭代次数,在满足精度要求的前提下快速准确地输出干扰信号的幅度估计值,从而在观测点有限的情况下显著改善干扰信号幅度估计的精度。 The interference of the [0089] signal amplitude estimation method and apparatus in accordance with a preset threshold value can be determined whether the iteration, effectively reducing the number of iterations, rapid and accurate estimate of the interference amplitude of the output signal in meeting the accuracy requirements, thereby in the case of finite observation point significantly improve the accuracy of estimation of the interference signal amplitude. 另外,通过相关算法估计所述干扰信号及有用信号的幅度值,使得本发明不仅可以应用于实数域,还可应用于复数域, 从而拓宽了本发明的应用范围,更加符合实际的工程处理情形。 Further, through the relevant algorithm to estimate the interference signal and the amplitude value of the useful signal, so that the present invention is applicable not only to the real domain, the complex field may also be applied, thus broadening the scope of application of the present invention, a more realistic case of engineered .

Claims (10)

  1. 1. 一种干扰信号幅度估计方法,该方法包括如下步骤: (a) 接收一混合信号; (b) 对所述混合信号采样得到一离散的观测信号,其中,所述观测信号包括一干扰信号及一有用信号; (c) 估计所述观测信号中的干扰信号的幅度值; (d) 根据计算出的干扰信号的幅度值,从观测信号中去除所述干扰信号,从而得到一个不包括所述干扰信号的中间信号; (e) 从所述中间信号中解调出所述有用信号; (f) 估计解调出的所述有用信号的幅度值; (g) 根据计算出的所述干扰信号及有用信号的幅度值计算误差扰动参量; (h) 判断所述误差扰动参量是否小于一门限值;以及(i) 当所述误差扰动参量小于所述门限值时输出估计的所述干扰信号的幅度值; (j) 当所述误差扰动参量大于所述门限值时再次估计干扰信号的幅度值,并返回步骤(d)〇 1. An interference signal amplitude estimation, the method comprising the steps of: (a) receiving a mixed signal; (b) the mixed signal obtained by sampling a discrete observation signal, wherein said signal comprises an observed interference signal and a useful signal; (c) the estimated value of the amplitude of the interference signal in the observation signal; (d) the calculated value according to the amplitude of the interference signal, removing the interference signal from the observation signal so as to obtain a does not include the said intermediate signal is an interference signal; (e) demodulating the signal from the said intermediate useful signal; (f) estimating the amplitude value of the demodulated useful signal; (G) is calculated according to the interference signal and the useful signal amplitude value calculation error of the disturbance variables; (H) determining whether the error is smaller than a disturbance variable threshold value; and wherein (i) when the output estimation error is smaller than the disturbance variable threshold value the amplitude of the interfering signal; (j) when the error is larger than the reference disturbance threshold amplitude value estimated interference signal again, and returns to step (d) square
  2. 2. 如权利要求1所述的干扰信号幅度估计方法,其特征在于,步骤(b)具体包括: 将所述混合信号经过匹配滤波器处理; 对经过匹配滤波器处理的所述混合信号进行符号率采样,从而得到所述离散的观测信号。 2. The interference signal amplitude estimating method according to claim 1, wherein step (b) comprises: the mixed signal through the matched filter processing; through the matched filter for processing the mixed signal symbol sampling rate, the observed signal to obtain discrete.
  3. 3. 如权利要求1所述的干扰信号幅度估计方法,其特征在于:在步骤(c)中,采用相关运算并利用如下公式估计干扰信号的幅度值: 3. The interference signal amplitude estimating method according to claim 1, wherein: in step (c), a correlation calculation using the following equation using the estimated value of the interference signal amplitude:
    Figure CN103457630BC00021
    其中,S表示估计的干扰信号的幅度值,4表示观测信号,slk表示干扰信号,N为所取的观测信号的观测长度,k的取值从1到N。 Wherein, S represents the amplitude of the interfering signal estimate, the observed signal represents 4, represents the observed length of the observed signals SLK interference signal, N being taken, k values ​​from 1 to N.
  4. 4. 如权利要求3所述的干扰信号幅度估计方法,其特征在于:步骤(d)中的所述中间信号表示为:4 = ;在步骤(e)中,若所述有用信号为双相相移键控信号,则h )]:若所述有用信号为正交相移键控信号,则 4. The interference signal amplitude estimating method according to claim 3, wherein: the intermediate signal in step (d), is represented as: = 4; in step (e), when the desired signal is biphase phase shift keying signal, h)]: If the wanted signal is a quadrature phase shift keying signal,
    Figure CN103457630BC00022
    其中,rk'表不中间信号,表不有用信号。 Wherein, rk 'table is not an intermediate signal, the table is not useful signal.
  5. 5. 如权利要求4所述的干扰信号幅度估计方法,其特征在于: 在步骤(g)中,误差扰动参量的计算公式为: 5. The interference signal amplitude estimation according to claim 4, characterized in that: in step (g), the error is calculated as the disturbance parameters:
    Figure CN103457630BC00023
    其中,A表示所述误差扰动参量;|为步骤(f)估计解调出的有用信号的幅度值,其中 Wherein, A represents the error parameter perturbation; | estimated value of the amplitude of the demodulated useful signal of step (f), wherein
    Figure CN103457630BC00031
    在步骤(j)中,若所述误差扰动参量大于所述门限值,则根据如下公式: In step (j), if the error is larger than the reference disturbance threshold value, according to the formula:
    Figure CN103457630BC00032
    重新估计干扰信号的幅度值。 Re-estimate the magnitude of the interfering signal.
  6. 6. -种干扰信号幅度估计装置,其特征在于,该装置包括: 信号接收模块,用于接收一混合信号; 采样模块,用于对所述混合信号采样得到一离散的观测信号,其中,所述观测信号包括所述干扰信号及一有用信号; 第一计算模块,用于估计所述观测信号中的干扰信号的幅度值; 第二计算模块,用于根据计算出的干扰信号的幅度值,从观测信号中去除所述干扰信号,从而得到一个不包括所述干扰信号的中间信号; 解调模块,用于从所述中间信号中解调出所述有用信号; 第三计算模块,用于估计解调出的所述有用信号的幅度值; 第四计算模块,用于根据计算出的所述干扰信号及有用信号的幅度值计算误差扰动参量; 判断模块,用于判断所述误差扰动参量是否小于一门限值;以及输出模块,用于当所述误差扰动参量小于所述门限值时输出估计的所述 6. - Species interference signal amplitude estimation means, wherein, the apparatus comprising: a signal receiving means for receiving a mixed signal; sampling means for obtaining a discrete observation signal the mixed signal samples, wherein the the said observation signal comprising a useful signal and an interference signal; a first calculating means for estimating an amplitude of the interfering signal in the observation signal; second calculating means for calculating an amplitude value of the interference signal based, removing the interfering signal from the observation signal so as to obtain an intermediate signal including the interference signal; demodulating means for demodulating the useful signal from said intermediate signal; a third calculating means for estimating the amplitude value of the demodulated useful signal; a fourth calculating means for calculating an error value of the disturbance variable amplitude according to the calculated interference signal and the wanted signal; determining means for determining the error parameter perturbation when the estimated output and an output module for the disturbance variable when the error is smaller than the threshold value; is smaller than a threshold value 扰信号的幅度值; 所述第一计算模块还用于在所述误差扰动参量大于所述门限值时再次估计干扰信号的幅度值,所述第二计算模块、解调模块、第三计算模块及第四计算模块根据重新计算出的干扰信号的幅度值重新进行相应的操作,直至误差扰动参量小于门限值。 The amplitude value of the interference signal; the first calculation module is further configured to estimate an amplitude of the interfering signal disturbance again when the error is larger than the reference threshold value, said second calculation module, demodulation module, a third calculation a fourth calculation module and the module re-perform a corresponding operation according to the amplitude value recalculated interference signal, the disturbance parameters until the error is less than the threshold value.
  7. 7. 如权利要求6所述的干扰信号幅度估计装置,其特征在于:所述采样模块首先将所述混合信号经过匹配滤波器处理,然后对经过匹配滤波器处理的所述混合信号进行符号率采样,从而得到所述离散的观测信号。 The amplitude of the interference signal as claimed in claim 6, said estimating means, wherein: the sampling module is first mixed signal after the matched filter processing, then passes through the matched filter processed mixed signal symbol rate sampling, whereby said discrete observation signal.
  8. 8. 如权利要求6所述的干扰信号幅度估计装置,其特征在于:所述第一计算模块采用相关运算并利用如下公式估计干扰信号的幅度值: 8. The amplitude of the interfering signal estimation apparatus according to claim 6, wherein: the first calculation module using correlation calculation using the formula and the estimated amplitude of the interfering signal:
    Figure CN103457630BC00033
    其中,i表示估计的干扰信号的幅度值,4表示观测信号,slk表示干扰信号,N为所取的观测信号的观测长度,k的取值从1到N。 Where, i denotes the amplitude of the interfering signal estimate, the observed signal represents 4, represents the observed length of the observed signals SLK interference signal, N being taken, k values ​​from 1 to N.
  9. 9.如权利要求8所述的干扰信号幅度估计装置,其特征在于:所述第二计算模块采用公式:&二/vi^计算所述中间信号;若所述有用信号为双相相移键控信号,则所述解调模块采用公式:解调所述有用信号;若所述有用信号为正交相移键控信号,则所述解调模块采用公式: The amplitude of the interference signal as claimed in claim 8, said estimating means, wherein: said second calculation module using the formula: & two / vi ^ calculates the intermediate signal; if the useful signal is a bipolar phase shift keying control signal, the demodulation module using the formula: demodulating the useful signal; if the useful signal is a quadrature phase shift keying signal, the demodulation module using the equation:
    Figure CN103457630BC00041
    解调所述有用信号;其中,rk'表示中间信号,先丨表不有用信号。 Demodulating the useful signal; wherein, rk 'denotes an intermediate signal, the first table is not a useful signal Shu.
  10. 10.如权利要求9所述的干扰信号幅度估计装置,其特征在于: 所述第四计算模块采用公式 10. The amplitude of the interfering signal estimation apparatus of claim 9, wherein: said fourth calculation module using the equation
    Figure CN103457630BC00042
    汁算误差扰动参量,其中,△表示所述误差扰动参量;|为步骤(f)估计解调出的有用信号的幅度值,其中 Operator error juice disturbance variable, wherein, △ represents the error parameter perturbation; | estimated value of the amplitude of the demodulated useful signal of step (F), wherein
    Figure CN103457630BC00043
    所述第一计算模块还用于在所述误差扰动参量大于所述门限值,根据公式: The first computing module is further configured to reference the disturbance error is larger than the threshold value, according to the formula:
    Figure CN103457630BC00044
    重新估计干扰信号的幅度值。 Re-estimate the magnitude of the interfering signal.
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