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I have an OFDM signal affected by AWGN, if I know the power of the gaussian noise, can I recover the OFDM signal? Can I perform deconvolution to recover the original signal? thanks

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Yes, when we can recover OFDM in fading scenarios along with gaussian noise, then yes we can also recover it in just gaussian noise. You can think of fading coefficients having a magnitude of 1 and phase zero

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  • $\begingroup$ Hi, could you please give me a Matlab example, because I am not sure where to perform deconvolution operation, for the received time domain samples? or for constellation after FFT? thanks $\endgroup$ – omaro goneim Aug 26 at 8:54
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Your question is vague for me.

I understand that you want to make a convolution on an received OFDM signal to synchronize right?

OFDM signal is demodulated through an FFT. Usually FFT size is a power of 2 (128,256,512,etc...). To demodulate FFT symbols cleanly, they must be synchronized (beginning symbol is found)

Your OFDM waveform has probably a preamble, you could use it to synchronize. Correlating preamble sequence with received signal can be enough if there is no carrier frequency offset (in time domain).

If there is a carrier frequency offset, you could synchronize in frequency domain first.

This is quite an amount of work in Matlab.

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