Frequency division multiplex/FM modulation recognition system
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United States of America Patent
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-
Jul 4, 1989
Grant Date -
N/A
app pub date -
Feb 29, 1988
filing date -
Feb 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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