sar_echo.m

回波信号模拟

%======================================================================
%%%(II) echo return modelling (point target)
%======================================================================

na=fix(Ta*prf/2);							% azimuth sampling number
ta=-na:na;											
ta=ta/prf;								   % slow time along azimuth
xa=va*ta-Ra*cos(theta);				   % azimuth location along flight track
Na=2*fix(na);

%x0=[  0  0  0  0  0 ];             % define multi points if you want
%R0=[-20 -10 0 10 20 ];             % x0: azimuth location (positive towards forward velocity)
                                    % R0: slant range location (positive towards far range)

x0=[ 0 0 ];  R0=[ 0 10 ];                % only one point
Npt_num = length(x0);