Alright, I tuned a few more parameters (packet size, tx and rx gain)
and got to a point where BPSK successfully receives almost all of the
packets sent, and even QAM256 works, albeit very poorly. In my
experiments changing the cyclic prefix didn't seem to have any impact.
cheers,
veljko
2010/1/
Thanks for the reply Patrik,
I managed to identify parameter values that make OFDM decoding work.
It seems that low decimation/interpolation rates don't work (a bunch
of "S"s at the receiver), nor do higher modulation schemes. The
performance is very sensitive to the fft_length/occupied_tones.
As
Hi,
I've tried the OFDM example on the USRP2 with minor changes and I didn't
encounter any problems. Be sure that you have the same FFT-length, number of
occupied tones, interpolation/decimation on both the receiver and transmitter.
Have you tried to increase the distance between the transmitte
