Adaptive equalizer system for quadrature amplitude modulation

Details Adaptive equalizer system for quadrature amplitude modulation Adaptive equalizer system for quadrature amplitude modulation

1981-12-22

1984-06-05

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375106, H04B 318

Patent

active

044532563

ABSTRACT:
An adaptive equalizer system for quadrature amplitude modulated waves is disclosed herein. The equalizer system comprises a circuit for equalizing the received signal as a function of a composite control signal; a circuit for generating a first control signal as a function of the deviation of the equalized signal from a zero-forced waveform; a circuit for generating a second control signal as a function of the asynchronization of the equalizer system; and an output circuit for processing both of said first control signal and said second control signal, producing the composite control signal which controls the equalizing means of the equalizer system.

REFERENCES:
patent: 3990010 (1976-11-01), Bennett
patent: 4146840 (1979-03-01), McRae et al.
patent: 4180705 (1979-12-01), Guidoux et al.
patent: 4343041 (1982-08-01), Forney, Jr.
patent: 4355397 (1982-10-01), Stuart

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