Re: [Discuss-gnuradio] detect if certain channels are being used

[Marcus Müller]

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Hi Guy,

100MHz bandwidth is not easy to process. In fact, you can only capture
it at once if you have one of the brand new USRP X3*0.
But let's assume you have that :) and let's assume you have the
processing power to handle that amount of data.

You have to realize that "signal, no matter what" at f1,f2,f3 is not
really a specification. A signal might be a spread-spectrum signal
that is far below interference from electronic devices etc., as well
as an extremly short impulse, caused by some electric flash or
whatever, it can be very little Energy in a very narrow channel or
very much energy spread over 10s of Mhz's...

So, what you do is usually bandpass your signalled filter, and have a
model for your desired signal and look out for things that match that.
Depending on your model, this can be easy or impossible...

Greetings,
Marcus

On 05.02.2014 20:39, address@hidden wrote:
> 
> Hi folks,
> 
> I want to accomplish the following with my usrp: Receive from 1400
> Mhz till 1500 Mhz and detect if there is activity (=signal, no
> matter what) on 1430, 1430 and 1490 Mhz So i have to split the
> spectrum in 3 parts (= channels) and do a peak detection on each. 
> But how do i split the spectrum of my source?
> 
> kind regards Guy
> 
> 
> 
> 
> 
> _______________________________________________ Discuss-gnuradio
> mailing list address@hidden 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
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