Frequency division multiplex/FM modulation recognition system

Details Frequency division multiplex/FM modulation recognition system Frequency division multiplex/FM modulation recognition system

1988-02-29

1989-07-04

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

370120, H04J 100

Patent

active

048457078

ABSTRACT:
A recognition system for comparing energy distributions of incombing emitters with known frequency spectrums is shown. Frequency spectrum analysis of randomly generated signals produces references against which the incoming communication wave may be checked. the recognition system recognizes a plurality of subchannel modulation types. Since there are many different subchannel modulation types in use today, small tactical weapons systems must recognize a number of different signals. Once certain parameters describing each subchannel modulation type are provided to the recognition system, the spectrum analysis of the subchannel modulation types is stored for subsequent use. This system provides for recognizing various FSK signals, PSK signals and OOK signals, as well as being adaptable to tracking other signals which are defined in terms of certain parameters.

REFERENCES:
patent: 4349903 (1982-09-01), Kobler
patent: 4398286 (1983-08-01), Geesen et al.

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