chaper3_1.asv

这是阵列信号处理的DOA估计学习的好例子！很值得借鉴的！

%第三章,P30(1),绘出空域付氏变换的空间谱
%array_nums为阵元数目；
%angle_fai为信号的方向；
%d/lamda为1/2即距离为半波长;
%si为1即0源的信号设为1;
clc;clear;
arrary_nums=8;
angles_fai=30*pi/180;
fai=linspace(-100,100,1000);
sig_Ferier=zeros(1,1000);
for i=1:1000
    angles_fairad=fai(i)*pi/180;
    sig_Ferier(i)=sin(arrary_nums*pi/2*(sin(angles_fairad)-sin(angles_fai)))...
    /sin(pi/2*(sin(angles_fairad)-sin(angles_fai)));
    sig_Ferier(i)=abs( sig_Ferier(i));
end
plot(fai,sig_Ferier)
xlabel('角度');
ylabel('幅度');
grid on