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
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.