Hi, I am trying to build the OFDM decoder on GRC based on the FTW 802.11a/g encoder.
At the USRP2 receiver, after CFO compensation, I want to see the QPSK constellation. Basically, the process is: bit stream ---- ofdm mod ---- usrp2 sink usrp2 source -- timing offset comp --- CFO comp ---- ofdm demod ----- constellation sink Before ofdm_demod, the signal spectrum observed in USRP2_fft is good as far as I know. But after OFDM demod block, I can not receive anything. No data output! :( I read some threads by Veljko, regarding to the parameter setting of OFDM demod block. But I am not sure about the number of tones, SNR. Where can I find the definition of this block? What is the meaning of S and Time out? By the way, my setup environment is ubuntu 9.04 + gnuradio 3.2.2. -- Regards, Guanbo
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