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Re: [Discuss-gnuradio] USRP2 + WBX How to use a 32 MHz signal band?

From: Vlad Stoianovici
Subject: Re: [Discuss-gnuradio] USRP2 + WBX How to use a 32 MHz signal band?
Date: Tue, 30 Nov 2010 00:18:18 -0800 (PST)

You are right, it doesn't make any sense, I was thinking about the reverse method, taking for example just 10 MHz out of a total band of 12.5 by filtering or resampling, but that is totally different since you have extra band and you just eliminate the extra part, but here you can't just make up the difference between 25 and 32 MHz.


--- On Tue, 11/30/10, Tom Rondeau <address@hidden> wrote:

From: Tom Rondeau <address@hidden>
Subject: Re: [Discuss-gnuradio] USRP2 + WBX How to use a 32 MHz signal band?
To: "Vladutzzz" <address@hidden>
Cc: address@hidden
Date: Tuesday, November 30, 2010, 4:48 AM

On Mon, Nov 29, 2010 at 5:59 PM, Vladutzzz <address@hidden> wrote:
> What would be the best way to work with a 32 MHz band resulting from USRP2?
> I guess, since the minimum decimation rate is 4 (resulting in a 25 MHz
> signal band), some kind of interpolation will be required or maybe
> resampling?!
> Any ideas on how to proceed?
> Thanks in advance!
> Vlad.

I'm not entirely sure what you meant by interpolating or resampling,
but in case you were talking about what I think you were talking
about, that's not going to work. Sure, you can come in at 25 Msps and
resample to 32 Msps, but you won't be getting any more information out
of the signal by doing that. You'll still only have the information in
the original 25 MHz bandwidth, just now sampled at a higher rate
(which doesn't make any difference or, frankly, any sense).


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