Synchronizing circuit for offset quaternary phase shift keying

Details Synchronizing circuit for offset quaternary phase shift keying Synchronizing circuit for offset quaternary phase shift keying

1989-03-14

1990-08-14

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375120, 329307, H03D 324

Patent

active

049493574

ABSTRACT:
A synchronizing circuit for offset quaternary phase shift keying, comprises: a four-phase demodulator 10; a processing module (11, 12); and a phase error calculating circuit (15) followed by a phase correcting circuit (16) which delivers a phase error correction signal. The invention is applicable to telecommunications by microwave beams.

REFERENCES:
patent: 3806815 (1974-04-01), Fletcher et al.
patent: 4027265 (1977-05-01), Kobayashi et al.
patent: 4092606 (1978-05-01), Ryan
patent: 4313205 (1982-01-01), Rhodes
patent: 4314206 (1982-02-01), Attwood et al.
patent: 4438524 (1984-03-01), Muilwijk
patent: 4538111 (1985-08-01), Giusto
patent: 4847869 (1989-07-01), Labedz et al.

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