Busy detection means determining whether intelligence is being
conveyed anywhere within a specified range of frequencies --
specifically, the range of frequencies on which one intends to
transmit. Accomplishing this does not require decoding that
intelligence. It requires understanding the underlying modulation
schemes used in both digital and analog communication, and
implementing parallel detectors for these schemes using digital signal
processing techniques.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, John Becker <[EMAIL PROTECTED]> wrote:
>
> At 09:42 PM 1/24/06, you wrote:
> >The only automatic signals that should be confined to specified band
> >segments are those incapable of listening before transmitting. Since
> >stations would be free to upgrade to listen-before-transmit
> >protocols, there would be no "inflexibility" problem.
>
> And just how would listen to every digital mode
> known to man?
>
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
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DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion)
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