Programmable randomly tunable digital demodulator

Details Programmable randomly tunable digital demodulator Programmable randomly tunable digital demodulator

1993-12-28

1995-09-19

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

375209, 375210, H04B 169

Patent

active

054523273

ABSTRACT:
A programmable randomly tunable digital demodulator is provided with a carrier recovery loop and a PN code clock recovery loop each having a programmable digital loop filter coupled in series therein. Each digital loop filter is controlled by a timing control which is capable of controlling the carrier frequency tuning and the PN tuning frequency under the control of a microprocessor. A replica PN generator is programmed to produce an epoch signal when the transmitted carrier frequency and/or chipping rate is varied in a pseudorandom manner and is coupled to the timing controls so that the modulator replicates the received variable rate signals.

REFERENCES:
patent: 4627079 (1986-12-01), von der Embse
patent: 4777657 (1988-10-01), Gillaspie
patent: 5060180 (1991-10-01), Kingston et al.
patent: 5381446 (1995-01-01), McIntosh

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