i am trying to transmit sound through OFDM system using the USRP
i was able to transmit and receive audio in OFDM system without the USRP and
also was able to transmit and receive audio using the USRP without OFDM
when i try to merge the 2 system using the scope i see that there is a signal
before the OFDM demod and no signal exactly after it and receive a timeout
message
i am thinking that this happen because the sampling rate before the USRP is not
adjusted right for transmission(i am using 1 USRP and transmit and receive
using a basic Tx and a basic Rx)
so is there a way to know the output sampling rate exactly after the ofdm
modulation?
and if this was not the problem what may cause this problem?
the ofdm modulator parameters
fft length: 512
occupied tones:200
cyclic prefix:128
payload:0 (0=automatic)
and the i/p is 32000 samples
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