Re: [Discuss-gnuradio] Spectrum management in cognitive radio

When I see discussions on cognitive radio I always ask: What are your
plans for preventing interference to passive users of the radio spectrum
that you won't know about if your only method of determining spectrum
use is detecting transmissions?

Passive users of spectrum, like radio astronomy, meteorological
radiometry, etc. do not transmit and study signals enough that a
cognitive radio use detection system won't identify them as 'use' of the
spectrum. Transmitting on frequencies being used by passive users will
constitute interference of their use and likely render those frequencies
unusable for their purposes.

I'm not attacking but hoping to raise awareness.

- Galen, W8LNA


> Date: 4 Mar 2016 16:24:54 -0000
> From: "Prabaha Biswas" <biswas_prabaha31@rediffmail.com>
> To: <discuss-gnuradio@gnu.org>
> Subject: [Discuss-gnuradio] Spectrum management in cognitive radio
> Message-ID: <20160304162454.7976.qmail@f5mail-224-152.rediffmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I am trying to design a cognitive radio. I have already designed an energy detector as part of spectrum sensing and now I am trying to implement spectrum management. So, I need to transmit a signal at those sections of the frequency spectrum where the threshold block outputs a zero value. Basically I need to link the output from the threshold block from the energy detector flow graph with that of the USRP source such that the USRP transmits at a frequency where the threshold block outputs a zero value. Is there a way to do this ?
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