%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% LFM_RADAR
%% fangjian
%% 2010-3-3
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
clc;
clear all
close all
%%%%%%%%%%%% 参数及变量 %%%%%%%%
B=30e6; %频带宽度
T=10e-6; %脉冲宽度
K=B/T;%调频斜率
Tar_T=35e-6; %接收到雷达信号的时间
N_total=1e4;%总点数
Step=Tar_T/N_total;
Tar=[10.5 11 12 12.005 13 13.002]*1000; %%目标距离(m)
Light_Speed=3e8; %光速10^8
Tar_T0=(Tar*2)/Light_Speed; %不同目标距离产生的时延
Len=round(Tar_T0/Step)-1.9e4;
t=Step:Step:Tar_T;
M=N_total-Len;%有值的点的个数
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%%%%%%%%%% MAIN %%%%%%%%%%%%
for n=1:length(Tar)
% for m=1:(Tar_T-1)/Step
m_n=M(n);
S1=zeros(1,m_n);
for m=1:m_n
S1(m)=rect(t(m)/T)*cos(pi*K*t(m)^2);
S2=zeros(1,Len(n));
end
S(n,:)=[S2 S1];
end
S_total=sum(S,1);
figure(1);
plot(t,S_total)
%%%%%%%%%%% 匹配滤波器 %%%%%%%%%%
for k=1:length(t)
h(k)=rect(t(k)/T)*cos(pi*K*t(k)^2);
end
figure(2);
S_After_Match=conv(h,S_total);
semilogy(S_After_Match);
grid on;
LFM_RADAR2.zip_lfm radar_雷达信号_雷达信号生成
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2022-09-24
17:06:00
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