sar_echo.m

回波信号模拟

FsFactor = 1.0;
theta=90*pi/180;						   % squint angle   

%======================================================================

lamda=c/fc;									% wavelength
Br=k_r*c/2./res_r;					   % required transmitted bandwidth
Fs=Br*FsFactor;						   % A/D sampling rate
bin_r=c/2./Fs;							   % range bin
Kr=Br/Tp;					  		      % range chirp rate	  

La=Ra*k_a*lamda/2/res_a;            % required synthetic aperture length
Ta=La/va;									% required synthetic aperture time
fdc=2*va*cos(theta)/lamda;          % doppler centriod
fdr=-2*(va*sin(theta)).^2/lamda/Ra;	% doppler rate
Bd=abs(fdr)*Ta;						   % doppler bandwidth
prf=round(Bd*2);						   % PRF