Lock detector for unbalanced QPSK demodulators

Details Lock detector for unbalanced QPSK demodulators Lock detector for unbalanced QPSK demodulators

1991-07-31

1992-06-09

Pascal, Robert J.

Demodulators

Phase shift keying or quadrature amplitude demodulator

Input signal combined with local oscillator or carrier...

331 4, 331DIG2, 375 81, 375120, H04L 2700

Patent

active

051210711

ABSTRACT:
A lock detector circuit (60) for demodulators of UQPSK signals I and Q has signal processing circuits for forming the signals:

REFERENCES:
patent: 4092606 (1978-05-01), Ryan
patent: 4713630 (1987-12-01), Matthews
patent: 4860321 (1989-08-01), von der Embse
patent: 4870382 (1989-09-01), Keate et al.

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