A method of
spread spectrum radiocommunications. It uses several different
frequencies in a
psuedorandom order, and "hops" between them. Generally the
transceiver won't dwell on a given
frequency for more than 50
milliseconds, but sometimes shorter or longer dwell times are used.
This method of
spread spectrum communications provides a very
secure, generally hard to
interfere with, and most often high datarate method of communicating without
wires. It is all of these things because, the
order of, number of, and
frequency of hops is
pseudorandom, generally negotiated by the
transceivers before data
transmission begins and also during communication. This ensures that
interference on any given
frequency cannot disrupt the entire (or for that matter, a meaningful
percentage of the)
transmission/
reception; the
pseudorandom frequencies and hops also make it nearly
impossible to be listened in upon without prior knowledge of said sequence (hence secure).
see also:
direct sequence.