银川做网站建设,如何做盗版网站,推广费,徐州在线网#x1f4a5;#x1f4a5;#x1f49e;#x1f49e;欢迎来到本博客❤️❤️#x1f4a5;#x1f4a5; #x1f3c6;博主优势#xff1a;#x1f31e;#x1f31e;#x1f31e;博客内容尽量做到思维缜密#xff0c;逻辑清晰#xff0c;为了方便读者。 ⛳️座右铭欢迎来到本博客❤️❤️ 博主优势博客内容尽量做到思维缜密逻辑清晰为了方便读者。 ⛳️座右铭行百里者半于九十。 本文目录如下 目录 1 概述 2 运行结果 3 参考文献 4 Matlab代码实现 1 概述
空间匹配滤波器Spatial Matched Filter是一种用于信号处理的滤波器。它的原理是通过将输入信号与预先存储的参考信号进行相关运算从而增强目标信号并抑制噪声。空间匹配滤波器在雷达、声纳等领域广泛应用用于目标检测、目标跟踪等任务。
锥形最佳波束成形器Conical Beamformer是一种用于信号处理的波束成形器。它通过调整传感器阵列中各个传感器的权重使得阵列对特定方向的信号响应最大化从而实现对目标信号的增强。锥形最佳波束成形器在无线通信、声纳等领域常用于信号接收和目标定位。
非锥形最佳波束成形器Non-Conical Beamformer是一种波束成形器的变种。与锥形最佳波束成形器不同的是非锥形最佳波束成形器可以实现对多个目标信号的增强而不仅仅是单个方向的信号。非锥形最佳波束成形器在多目标检测和定位等任务中具有重要应用。
样本矩阵反演Sample Matrix Inversion是一种用于信号处理的方法。它通过对接收到的信号进行采样和矩阵运算估计信号源的位置和强度。样本矩阵反演在无线通信、雷达等领域常用于信号定位和信号源分离。
以上这些方法在阵列信号处理中都有广泛的研究和应用它们可以提高信号的质量和可靠性从而提升系统性能。
2 运行结果 部分代码
% We illustrate the use of tapers with the spatial matched filter for the extraction % of a radar signal in the presence of a jamming interference source using a ULA with M 20 % elements with $\lambda/2$ spacing. The desired radar signal is known as a target and is % present for only one sample in time. Here the target signal is at time sample (range gate) % n 100 and is at $\phi_s 0^{\circ}$ with an array SNR of 20 dB. The jammer transmits a % high-power, uncorrelated waveform (white noise). The angle of the jammer is $\phi_i 20^{\circ}$ % and its strength is 40 dB. The additive, sensor thermal noise has unit power (0 dB). % % Copyright 2016 - 2026, Ilias S. Konsoulas.
%% Workspace Initialization. clc; clear; close all;
%% Signal Definitions. M 20; % Number of Array Elements. N 200; % Number of Signal Samples. n 1:N; % Sample Index Vector. lambda 1; % Incoming Signal Wavelength in (m). d lambda/2; % Interelement Distance in (m). SNR 20; % target volatege signal array SNR in dBs. INR 40; % interference array SNR in dBs. phi_s 0; % target azimuth angle in degrees. phi_i 20; % interference azimuth angle in degrees.
u_s (d/lambda)*sin(phi_s*pi/180); % Target Normalized Spatial Frequency. u_si (d/lambda)*sin(phi_i*pi/180); % Jammer Normalized Spatial Frequency.
s zeros(M,N); s(:,100) 10^(SNR/20)*exp(-1i*2*pi*u_s*(0:M-1).)/sqrt(M);
% Uncorrelated unit power thermal noise samples drawn from a complex Gaussian distribution w (randn(M,N)1i*randn(M,N))/sqrt(2);
% The interference (jammer) vector is generated by: % v_i exp(-1i*pi*[0:M-1]*sin(phi_i*pi/180))/sqrt(M); mentioned in the book is wrong. v_i exp(-1i*2*pi*u_si*(0:M-1).)/sqrt(M); i_x 10^(INR/20)*v_i*(randn(1,N)1i*randn(1,N))/sqrt(2);
%The three signals are added to produce the overall array signal x s i_x w;
% Two beamformers (steered to phi 0.) are applied to the resulting array returns: a spatial matched % filter and a tapered beamformer with a -50-dB sidelobe level. The resulting beamformer output % signals are shown in Figure 11.15. The spatial matched filter is unable to reduce the jammer % sufficiently to observe the target signal at n 100. However, the tapered beamformer is able % to attenuate the jammer signal below the thermal noise level and the target is easily extracted. % The target signal is approximately 18.5 dB with the -1.5 dB loss due to the tapering loss in (11.2.24).
%% Spatial Matched Filter or Steering Vector Beamformer. c_mf exp(-1i*2*pi*u_s*(0:M-1).)/sqrt(M);
% Spatial Dolph-Chebychev Window of length M 20 with -50 dB sidelobe attenuation: w chebwin(M,50);
% Compute the Combined Taper by taking the Hadamard product: c_mft c_mf.*w;
% Normalize the combined taper vector:
3 参考文献 部分理论来源于网络如有侵权请联系删除。 [1]罗日成,李卫国,李成榕.基于阵列信号处理的变压器内局部放电源多目标定位方法[J].电网技术, 2006, 30(1):5.DOI:10.3321/j.issn:1000-3673.2006.01.013.
[2]张小飞,汪飞,徐大专.阵列信号处理的理论和应用[M].国防工业出版社,2010.
[3]罗景青,保铮.雷达阵列信号处理技术的新发现(一)[J].现代雷达, 1993, 15(2):11.DOI:CNKI:SUN:XDLD.0.1993-02-015.
[4]马友科,宋万杰,吴顺君,等.基于多DSP的雷达阵列信号处理系统[J].雷达科学与技术, 2009, 7(2):4.DOI:10.3969/j.issn.1672-2337.2009.02.008.
4 Matlab代码实现
