matlab 编写的MUSIC，MVDR算法仿真

均匀线阵和均匀圆阵的MUSIC算法仿真，即MVDR滤波。程序还包括数字上变频和下变频

function y=duc2ddc（x）
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%输入复基带信号%%%%%%%%%%%%%%%%%%%
n=length（x）;
in=real（x）;
qn=imag（x）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%插值%%%%%%%%%%%%%%%%%%%%%%%%%%%%
ncz=n*64;
incz=zeros（1ncz）;
qncz=zeros（1ncz）;
for i=1:ncz
    if mod（i-164）==0
        incz（i）=in（（i-1）/64+1）;
        qncz（i）=qn（（i-1）/64+1）;
    end
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%滤波%%%%%%%%%%%%%%%%%%%%%%%%%%%%
fp=100000;
fs=300000;
ftcz=25.6*10^6;
[OrWnbetaftype] = kaiserord（[fpfs][10][0.010.01]ftcz）;
b=fir1（OrWnftypekaiser（Or+1beta）‘noscale‘）;
inczf=filter（b1incz）;
qnczf=filter（b1qncz）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%上变频%%%%%%%%%%%%%%%%%%%%%%%%%%%%
fc=10*10^6;
induc=inczf.*cos（2*pi*fc/ftcz*（0:ncz-1））;
qnduc=qnczf.*sin（2*pi*fc/ftcz*（0:ncz-1））;
s=induc+qnduc;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%加噪声%%%%%%%%%%%%%%%%%%%%%%%%%%%%
snr=15;
r=awgn（ssnr‘measured‘）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%下变频%%%%%%%%%%%%%%%%%%%%%%%%%%%%
inddc=r.*cos（2*pi*fc/ftcz*（0:ncz-1））;
qnddc=r.*sin（2*pi*fc/ftcz*（0:ncz-1））;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%滤波%%%%%%%%%%%%%%%%%%%%%%%%%%%%
inddcf=filter（b1inddc）;
qnddcf=filter（b1qnddc）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%抽取%%%%%%%%%%%%%%%%%%%%%%%%%%%%
incq=zeros（1n）;
qncq=zeros（1n）;
for i=1:ncz
    if mod（i-164）==0
        incq（（i-1）/64+1）=inddcf（i）;
        qncq（（i-1）/64+1）=qnddcf（i）;
    end
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%返回复基带信号%%%%%%%%%%%%%%%%%%%
y=incq+1i*qncq;
end

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       1614  2014-01-06 15:56  mvdr2.m

     文件       1981  2014-01-02 09:53  mvdr3.m

     文件       1717  2014-01-07 12:16  duc2ddc.m

     文件       2740  2013-12-02 21:34  mvdr1.m

----------- ---------  ---------- -----  ----

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