How can I recover original complex signal after fft?

3 次查看（过去 30 天）

murat alboga 2018-7-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/410110-how-can-i-recover-original-complex-signal-after-fft

编辑： murat alboga 2018-7-12

Hello,

There is a simple code in below that I prepared for understandable a question. My purpose is recover original complex signal after FFT process in Matlab.

As you understand from code, I created 1x128 complex vector. After I implement IFFT process this code. Then again I implemented FFT process for recover original complex code. Code:

a1 = linspace(0.1,0.6,128); a2 = linspace(0.2,0.6,128); cn = complex (a1,a2); ifcn = ifft(cn,128,2); fcn = fft(ifcn,128,2); %difcn = fcn - cn;%Checking difference between original and after fft %codes.

There are few questions in my mind.

-Is ıt possible recover original complex signal after IFFT and FFT, If it is possible please could you describe me?

-In my project code normally has more deatils also I will implement after IFFT AWGN noise to signal. If this code works properly I am thinking use the this code.

Thanks in Advance

Pales