Differential phase shift keyed receiver

Details Differential phase shift keyed receiver Differential phase shift keyed receiver

1981-06-11

1983-11-15

Bookbinder, Marc E.

Pulse or digital communications

Repeaters

Testing

329137, 329145, H04L 2722

Patent

active

044160160

ABSTRACT:
A Differential Phase Shift Keyed (DPSK) receiver is arranged to detect DPSK signals that contain the O.degree. vector as an information bearing signal in its constellation. The received signal is phase shifted by 90.degree.. A 45.degree. phase shifted signal is thereafter synthesized by additively combining the DPSK signal and the 90.degree. phase shifted signal. Using these signals, detection proceeds by means of correlation techniques. The polarities of the correlation products uniquely determine the phase changes of the DPSK signal.

REFERENCES:
patent: 3238459 (1966-03-01), Landee
patent: 3665328 (1972-05-01), Widl
patent: 3818346 (1974-06-01), Fletcher et al.
patent: 4343018 (1982-08-01), Niimura et al.

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