Re: [Discuss-gnuradio] OFDM Transmiter and receiver by using USRP1

[Marcus D. Leech]

On 10/16/2011 12:29 PM, waqasme wrote:
> Hello all,
> I am trying to transmitt and recieve OFDM signal Via USRP1 board. I made
> basic simulation in GNU radio a signal source block and then interleave and
> then OFDM modulator and then channel model block then usrp1 sink and fft
> sink to see the output..In FFT sink at the end it shows proper square like
> OFDM signal but on the other hand in spectrum analyser it shows only one
> peak sine wav signal not OFDM. I tried to play with the setiings but
> couldnot get the desired ofdm signal output. This is just tranmitter setup
> and i attched with spectrum anlyzer but i dinot get OFDM signal . iam only
> getting simple sine wave in the spectrum analyser. I tried with simple
> random sourse block and then DQPSK modulator and Usrp sink then it worked it
> shows sine wave signal in out put at spectrum analyser.Please any body know
> how to fix this problem or any solution ??? For reciever part i will use the
> same block in reverse order with ofdm demodulator..  All suggestions are
> appriciated.
> Looking forward to it...
>
> Thanks in advance..
> waq.
More specificity is usually required to allow people to help you.  
Posting your (GRC-produced) flow-graph would help.

From your description it's hard for anyone to help you.



--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org