Digital demodulator which quantizes signal components according

Details Digital demodulator which quantizes signal components according Digital demodulator which quantizes signal components according

1991-05-22

1994-03-15

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 85, 375 86, 329304, H03D 300, H04L 2722

Patent

active

052951626

ABSTRACT:
There is disclosed a digital demodulator for the demodulation of an m-phase shift keying modulated signal. The demodulator comprises a sampling and quantizing circuit which samples and quantizes in-phase and in-quadrature components of the modulated analog signal and a carrier recovery circuit for reconstructing the carrier. The sampling and quantizing circuit quantizes the in-phase and in-quadrature components by means of a number of different quantization thresholds. This device is used in communications systems, particularly terrestrial and satellite microwave links and computer-to-computer links.

REFERENCES:
patent: 4241454 (1980-12-01), Snell et al.
patent: 4726043 (1988-02-01), Levesque
patent: 4773083 (1988-09-01), Baumbach et al.

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