Process and device for the nonlinear equalization of digital sig

Details Process and device for the nonlinear equalization of digital sig Process and device for the nonlinear equalization of digital sig

1977-06-23

1979-10-09

Gruber, Felix D.

Telegraphy

Systems

Printing

178 88, 325324, 325477, 364724, H04B 110, H03K 5159

Patent

active

041707583

ABSTRACT:
A receiver of digital signal pulses, operating with a sampling period T, comprises an equalizer which includes at least one feedback loop from the output of a decision unit for subtracting from an incoming signal pulse a value corresponding to the magnitude of a tail or postcursor of a preceding signal pulse. The signal pulse thus purged of postcursor interference is delayed by one or more sampling periods T for algebraic combination with one or more fed-forward compensating signals each representing the estimated value of an interfering precursor sample, these compensating signals being derived from the outputs of respective decision units with the aid of filters.

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patent: 3914691 (1975-10-01), Meadors, Jr.
patent: 3972000 (1976-07-01), Desblache et al.
patent: 3993956 (1976-11-01), Gilmore et al.
patent: 4025719 (1977-05-01), Nussbaumer
patent: 4032847 (1977-06-01), Unkauf
patent: 4076956 (1978-02-01), Dogliotti et al.
Osatake et al., Error Rate Improvement Through Digital Decision in Pulse Transmissions, Electronics and Communications in Japan, vol. 49, No. 10, Oct. 1966, pp. 28-35.
Salazar, Design of Transmitter and Receiver Filters for Decision Feedback Equalization, The Bell System Technical Journal, vol. 53, No. 3, Mar. 1974, pp. 503-523.
Gitlin et al., Passband Equalization of Differentially Phase-Modulated Data Signals, The Bell System Technical Journal, vol. 52, No. 2, Feb. 1973, pp. 219-238.

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