matlab例程，用于多重卷积函数。
DSPwithMatlabbyProakisandIngle

https://download.csdn.net/download/qq_41739364/86339152

利用fft实现线性卷积。
已知序列x1=[1234],x2=[136542]；
利用conv函数求x1和x2的线性卷积y(n)并绘出图形；
另外，利用fft求x1和x2的9点循环卷积，并绘出图形；
在用fft求x1与x2的8点和10点循环卷积，并绘出图形，比较四次结果，说明线性卷积与循环卷积的关系。

解决sdktools运行缺少adb和hprof-conv文件,解压后直接把这两个文件夹复制到android-sdk-windows目录下，重新运行SDKManager.exe即可。

hprof-conv.exe关于sdktools里面缺少这个运行文件

%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)');

hprof-conv.exe在sdktools里面缺少这个运行文件导致DDMSfilesnotfound:tools\hprof-conv.exe错误，详细看博客：https://blog.csdn.net/DickyQie/article/details/79657573

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序列图像的超分辨重建，有几种不同的算法MAP,POCS,conv,还有插值算法。

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