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.
