Multi-level quadrature amplitude modulator system with fading co

Details Multi-level quadrature amplitude modulator system with fading co Multi-level quadrature amplitude modulator system with fading co

1989-02-02

1990-02-06

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 58, 375 76, 375 99, 455 63, H04B 7005

Patent

active

048993670

ABSTRACT:
A multi-level quadrature amplitude modulator system that can be used in communication channels in which there is intense fluctuation has a transmitter section that is provided with a frame synchronizer that inserts a reference symbol into each group of message symbols, and a receiving section that is provided with an estimator for the transmission path distortion in the message symbols on the basis of distortion found in the reference symbols. The receiving section is also provided with a compensator for the distortion thus described.

REFERENCES:
patent: 4227152 (1980-10-01), Godard et al.

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