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Re: [Discuss-gnuradio] Help : Is this right that the daughterboard passe

From: ton ph
Subject: Re: [Discuss-gnuradio] Help : Is this right that the daughterboard passes data to the usrp board in the I and Q format.
Date: Thu, 28 Apr 2011 14:45:19 +0530

Thanks marcus ,
 That  means , if i use i5 processor and make some tweaking in gnuradio in right areas , i could be able to process my 100 Mhz bandwidth using my 200 MSPS ADC, 32 channel DDC which will only send data of only 3500Khz bandwidth data to the CPU, in spite of inviting a big overhead to the CPU by letting in the complete 100Mhz bandwidth baseband data... If i let CPU to process only 3500 Khz bandwidth data , i think we will be able to make the gnuradio do the processing.What my doubt was that using 200MSPS ADC with gnuradio could give some trouble or not ... as with the increase in the ADC rate , i hope the data
rate will also increase and hence the rest of the chain.

Your geniune advice is very much weighed from my side as well i am still hoping your geniune suggestions and guide.

On Wed, Apr 27, 2011 at 6:56 PM, Marcus D. Leech <address@hidden> wrote:
Thanks marcus , yes i am referring Software define radio , by jeffrey and Understanding digital signal processing by Lyon.
One question which i would like to know a thing is regarding the above discussion on processing 100Mhz bandwidth by my 200MSPS ADC, would not there be any problem of breakage in the flowgraph in such high speed , and thus i can use gnuradio for processing the 100Mhz bandwidth. Can you please suggest this and  i think after that i better start working on gnuradio what i want it to do.

The preferred topology is to run your ADC at 100Msps, and make it a dual-channel ADC, and have it process baseband-signals only.

Gnu Radio itself doesn't have any limitation with respect to incoming bandwidth, per se.  But Gnu Radio executes on a real CPU,
 with real limitations.  In the end, it comes down to how much $$$ you're willing to throw at the problem, and how much
 hand-tuning you're willing to do.

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