www.pudn.com > pulse_simulation_of_LFM_radar.rar > LFM_radar.m

%%demo of LFM pulse radar 
%================================================================== 
function LFM_radar(T,B,Rmin,Rmax,R,RCS) 
if nargin==0 
    T=10e-6;                                          %pulse duration 10us 
    B=30e6;                                           %chirp frequency modulation bandwidth 30MHz 
    Rmin=10000;Rmax=15000;              %range bin 
    R=[10500,11000,12000,12008,13000,13002];  %position of ideal point targets 
    RCS=[1 1 1 1 1 1];                           %radar cross section 
end 
%================================================================== 
%%Parameter 
C=3e8;                                            %propagation speed 
K=B/T;                                             %chirp slope 
Rwid=Rmax-Rmin;                           %receive window in meter 
Twid=2*Rwid/C;                               %receive window in second 
Fs=5*B;Ts=1/Fs;                             %sampling frequency and sampling spacing 
Nwid=ceil(Twid/Ts);                         %receive window in number 
%================================================================== 
%%Gnerate the echo       
t=linspace(2*Rmin/C,2*Rmax/C,Nwid); %receive window 
                                                            %open window when t=2*Rmin/C 
                                                            %close window when t=2*Rmax/C                             
M=length(R);                                        %number of targets                                         
td=ones(M,1)*t-2*R'/C*ones(1,Nwid); 
Srt=RCS*(exp(j*pi*K*td.^2).*(abs(td)