software-defined radio killer app
Ken Brown
k.brown at ccs.bbk.ac.uk
Fri Sep 20 04:26:24 PDT 2002
The biggest police station in western Europe is being built less than
half a mile from where I live. Your phone will keep on ringing and
ringing...
"Major Variola (ret)" wrote:
>
> In some parts of rural america, folks signal the presence of cops by
> flashing their headlights
> when driving.
>
> Occurs to me that would be a cool function for SDR: press code for or
> say "cop". For N seconds,
> phone periodically sends "cop" message picked up by other phones,
> ignored by base station [1]. Phone also listens for these local
> broadcasts. Upon hearing a suprathreshold number of "cop" messages the
> phone alerts its owner.
>
> Better than a radar detector for emissionless, but visible, cops. Over
> the hill coverage. Issues of
> spoofing, trust, consensus familiar to readers here.
>
> [1] (different band entirely? UWB? B-tooth? FRS? )
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