On Sat, 19 Feb 2011 18:34:47 -0500, "Michael A. Terrell"
wrote:



It isn't that simple. Police RADAR works by Doppler effect. I.E.,
the returned signal is mixed with with a sample of the transmitted
frequency. The difference in frequency tells your speed. Any attempt
to jam it will be a crap shoot. Even if you managed to match the RADAR
transmitter's frequency, it would still show your speed.


You know the frequency of the signal you receive. You know your speed.
Assuming you could build a circuit to compute the necessary bits, you
should have little trouble computing the original transmitted
frequency with those two bits of information. The simply transmitting
the same frequency back should result in the desired result of a lower
reading.