资源简介
宽带信号DOA估计TCT算法,经验证可用
代码片段和文件信息
%初始条件
clear all;
Sensor=8; %天线阵元数
bw1=1e7; % 信号带宽
bw2=1e7;
bw3=1e7;
f0=1e8;
T1=1e-2; %信号脉冲宽度
T2=1e-4;
T3=1e-6;
L=512; %采样点数
dt1=T1/L; %采样间隔
dt2=T2/L;
dt3=T3/L;
gc = 3e+8; %光速
snr = 2; %信躁比
degrad=pi/180;
p=3; % 信号源个数
angle=10;
angle2=20; %信号源角度
angle3=-40;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%构造采样序列
t1=(0:L-1)*dt1; %时域采样点
t2=(0:L-1)*dt2;
t3=(0:L-1)*dt3;
% sig1=exp(j*pi*bw1*t1.*t1/T1+2*pi*f0*t1); %产生线性调频信号
% sig2=exp(j*pi*bw2*t2.*t2/T2+2*pi*f0*t2);
% sig3=exp(j*pi*bw3*t3.*t3/T3+2*pi*f0*t3);
%上面三行代码是原程序的,有点小问题
sig1=exp(j*(pi*bw1*t1.*t1/T1+2*pi*f0*t1)); %产生线性调频信号
sig2=exp(j*(pi*bw2*t2.*t2/T2+2*pi*f0*t2));
sig3=exp(j*(pi*bw3*t3.*t3/T3+2*pi*f0*t3));
sig1=awgn(sig1snr);
sig2=awgn(sig2snr);
sig3=awgn(sig3snr);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%线性调频信号频率
F=bw1/(T1)*t1;
f1=F(64);
f2=F(2*64);
f3=F(3*64);
f4=F(4*64);
f5=F(5*64);
f6=F(6*64);
f7=F(7*64);
f8=F(8*64);
F=[f1f2f3f4f5f6f7f8];
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%构造采样数据矩阵
Lambda=gc/f8; % 波长
d=0.5*Lambda; %阵元间距离
tmp2=d*[0:Sensor-1 ]‘;
v11=sig1(1:64);
v12=sig1(65:128);
v13=sig1(129:192);
v14=sig1(193:256);
v15=sig1(257:320);
v16=sig1(321:384);
v17=sig1(385:448);
v18=sig1(449:512);
v21=sig2(1:64);
v22=sig2(65:128);
v23=sig2(129:192);
v24=sig2(193:256);
v25=sig2(257:320);
v26=sig2(321:384);
v27=sig2(385:448);
v28=sig2(449:512);
v31=sig3(1:64);
v32=sig3(65:128);
v33=sig3(129:192);
v34=sig3(193:256);
v35=sig3(257:320);
v36=sig3(321:384);
v37=sig3(385:448);
v38=sig3(449:512);
s1=[(v11);(v21);v31];
s2=[(v12);(v22);v32];
s3=[(v13);(v23);v33];
s4=[(v14);(v24);v34];
s5=[(v15);(v25);v35];
s6=[(v16);(v26);v36];
s7=[(v17);(v27);v37];
s8=[(v18);(v28);v38];
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%构造方向矩阵
A1=[exp(-j*2*pi*f1/gc*tmp2*sin(angle*degrad))exp(-j*2*pi*f1/gc*tmp2*sin(angle2*degrad))exp(-j*2*pi*f1/gc*tmp2*sin(angle3*degrad))];
A2=[exp(-j*2*pi*f2/gc*tmp2*sin(angle*degrad))exp(-j*2*pi*f2/gc*tmp2*sin(angle2*degrad))exp(-j*2*pi*f2/gc*tmp2*sin(angle3*degrad))];
A3=[exp(-j*2*pi*f3/gc*tmp2*sin(angle*degrad))exp(-j*2*pi*f3/gc*tmp2*sin(angle2*degrad))exp(-j*2*pi*f3/gc*tmp2*sin(angle3*degrad))];
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