software-defined radio killer app

[Ken Brown]

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? )