Method for determining the optimum sampling times for a QPSK or

Details Method for determining the optimum sampling times for a QPSK or Method for determining the optimum sampling times for a QPSK or

1982-09-28

1985-05-28

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 99, H04B 1502

Patent

active

045204926

ABSTRACT:
A method for determining the optimum sampling times in a quadrature phase shift keyed (QPSK) or quadrature amplitude modulated (QAM) received signal influenced by interference in the radio link between a transmitter and a receiver. The amplitudes of the two quadrature components of the received signal are compared in the receiver and the points in time at which the two amplitudes have the same magnitude are utilized as the sampling times.

REFERENCES:
patent: 3617900 (1971-11-01), Fink
patent: 3646446 (1972-02-01), Rittenbach
patent: 3733550 (1973-05-01), Tazaki et al.
patent: 3761818 (1973-09-01), Tazaki et al.
patent: 3925732 (1975-12-01), Tanaka et al.
patent: 3962637 (1976-06-01), Motley et al.
patent: 4143322 (1979-03-01), Shimamura
patent: 4352194 (1982-09-01), Caracappa
patent: 4355284 (1982-10-01), Acker
patent: 4370748 (1983-01-01), Janc et al.

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