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Re: [Discuss-gnuradio] What kind of spectrum sensing method does usrp us

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] What kind of spectrum sensing method does usrp use ?
Date: Wed, 15 Oct 2008 11:24:44 -0700
User-agent: Mutt/1.5.18 (2008-05-17)

On Wed, Oct 15, 2008 at 03:55:02PM +0800, Su Jinzhao wrote:
> Hi,
> I want to do some research on cognitive radio network with usrp, so I am
> more concern about what kind of spectrum sensing method does usrp adopt?

The USRP is a piece of h/w that along with software can do an
extremely wide range of tasks.

The USRP itself (and GNU Radio for that matter) doesn't adopt any
particular spectrum sensing method.  You are free to make up and
implement whatever you like.

>        I know that there are such spectrum sensing methods at present to
> determine which spectrum has been occupied by primary user: Matched Filter
> Detection, Energy Detection, Cyclostationary Feature Detection, and
> Interference Temperature,
> I read through the file usrp_spectrum_sense.py in directory
> "gnuradio-3.1.2/gnuradio-examples/python/usrp", but I didn't find the
> answer.

usrp_spectrum_sense show one way that you could step across the
spectrum and make measurements.  It happens to be computing FFTs, but
it's by no means the "right answer".

>        Does anyone know, please tell me which method does usrp adopt in
> spectrum sensing or where to search, thanks in advance.
> -- 
> Su Jinzhao


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