25 Sep
2013
25 Sep
'13
9:58 p.m.
On 9/25/13, Rich Jones <rich@openwatch.net> wrote:
That kind of technology is already widely deployed in walkie talkies - I think I remember at HOPE a speaker mentioning that the NYPD used this technique until they abandoned it due to its inconvenience.
http://en.wikipedia.org/wiki/Frequency-hopping_spread_spectrum
I don't think so, if I recall, it seemed to be a further development of the above linked idea. There might not have been the usual notion of a coded/shared freq hopping sequence in which a carrier transmit data. But more like a continuous parallel broadcast under the mask. Maybe the data was not carried within the freqs but in the choice of freqs themselves.