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

[waqasme]

hi Marcus,

I am attaching the screen shots and also block diagram of transmitter..
right now i am just trying to look for transmission of OFDM signal via
usrp1. As i mentioned earlier in the fft scope plot in gnu radio i see the
typical ofdm signal but on the other hand in usrp sink on the spectrum
analyser i saw only simple sine wave peak. please have a look and let me
know if there is something else do i need to do to generate the proper ofdm
signal on the spectrum analyser.

/home/hp/Desktop/spectrumoutput.jpeg 
http://old.nabble.com/file/p32675018/spectrumoutput.jpeg spectrumoutput.jpeg 



Block diagram in GNU radio
/home/hp/Documents/finaltesting.grc 
http://old.nabble.com/file/p32675018/finaltesting.grc finaltesting.grc 


Please have a look and suggest me how to fix this problem in order to see
the proper ofdm signal on spectrum analyser as well?? Do i need and firm
ware update or sumthing on FPGA on usrp1 ???
Looking forward to hear from you.

Thanks for your help.
Cheers.



Marcus D. Leech wrote:
> 
> On 10/16/2011 05:55 PM, waqasme wrote:
>> Hi Marcus,
>>
>> As i mentioned the flow graph signal blocks i have used in gnu radio
>> companion from that i am getting this out put on FFT sink in GNU radio
>> companion simulation flowgraph which is similar like this
>>
>>
>>
>>
> If you're trying to embed images, it's not working, and the de-embedded 
> ones on the bottom show only
>    the spectrum of something typical of OFDM, and a spectrum-analyser 
> output that looks like it was
>    set up to sweep from 10Hz to 5GHz (is that what you had in mind?), 
> which would produce only a sharp
>    peak in the middle.
> 
> We still don't know what your flow-graph(s) look like.
> 
> -- 
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
> 

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