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[Discuss-gnuradio] Re: OFDM demodulation problem / example video

From: Achilleas Anastasopoulos
Subject: [Discuss-gnuradio] Re: OFDM demodulation problem / example video
Date: Tue, 04 Apr 2006 16:16:53 -0400
User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)


I looked at your code and
I don't know if this makes a difference,
but I think the line
data = d_resamp(256:1792)
should be substituted by
data = d_resamp(257:1793)
since in an N=2m point FFT the DC is the m+1-st component
after fftshift (in our case it is the 1025-th component).

I still believe that ftaer correct frequency compensation the
picture should look like an unrotated QPSK, so my bet
is that there is something wrong with the frequency correction...


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