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谱估计源程序：是谱估计中的经典算法esprit,MUSIC等算法的源程序

%xianzhen music  阵元间距为半波长
close all;
clear all;
clc;

source_number=3;
snapshort_number=200;
sensor_number=8;
source_doa=[-30 30 60];
snr=10;

%A=zeros(sensor_number,source_number);
A=exp(-j*pi