N=tz/ts;
%%%产生雷达回波%%%%
echo_mobj_pulse=[zeros(1,100),1,1,zeros(1,N-102)];
s_pc=repmat(echo_mobj_pulse,1,16);
n=1:16*N;
s_doppler=cos(n*2*pi*f_doppler/fs);
s_pc=s_pc.*s_doppler;
s_noise=0.1*rand(1,N*16);
s_pc=s_pc+s_noise;
figure,
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