线性调频信号的压缩以及加窗处理

线性调频信号的压缩以及加窗处理
%线性调频信号的实部和虚部及时域脉压输出clearall;clc;T=16e-6;B=5e6;K=B/T;fs=6*B;Ts=1/fs;N=T/Ts;t=-T/2:T/(N-1):T/2;s=exp(j*pi*K*t.^2);y=conv(s,conj(s));len=length(y);t1=-T/2:T/(len-1):T/2;figure;plot(t,real(s));gridon;axis([-1.2e-51.2e-5-11]);xlabel('时间(s)');ylabel('幅度');title('LFM信号的I路');figure;plot(t,imag(s));gridon;axis([-1.2e-51.2e-5-11]);xlabel('时间(s)');ylabel('幅度');title('LFM信号的Q路');figure;plot(t1,20*log10(abs(y)/max(abs(y))));gridon;axis([-1.2e-51.2e-5-900]);xlabel('时间(s)');ylabel('幅度(dB)');title('时域脉压后的波形(未加权)');subplot(311);plot(t,real(s));gridon;xlabel('time(s)');ylabel('amplitude(dB)');title('realpartofLFM:T=16us,B=4MHz');axis([-T/2T/2-11]);subplot(312);plot(t,imag(s));gridon;xlabel('time(s)');ylabel('amplitude(dB)');title('imagepartofLFM:T=16us,B=4MHz');axis([-T/2T/2-11]);subplot(313);plot(t1,20*log10(abs(y)/max(abs(y))));gridon;axis([-1.2e-51.2e-5-900]);xlabel('时间(s)');ylabel('幅度(dB)');title('时域脉压后的波形(未加权)'); 本软件ID:1612562