Equalizer section

Details Equalizer section Equalizer section

1980-10-10

1982-08-10

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

364724, H04L 2503

Patent

active

043437591

ABSTRACT:
A data signal receiver (100) forms line samples of a received modulated data signal and applies them to a fractionally spaced equalizer (150). The equalizer outputs are demodulated and decisions are formed as to the values of the transmitted data symbols. The equalizer itself is comprised of a plurality of equalizer sections (220, 240, 260, 280) each of which multiplies ones of the line samples with respective ones of a queue of coefficients to form a partial sum. The partial sums are combined to form the overall equalizer output. Timing recovery and tap rotation control signals generated within the equalizer are generated as a function of the location within the coefficient queue of a reference coefficient, the latter illustratively being the coefficient of largest complex magnitude. An arbitration circuit (680) within each equalizer section determines whether that section holds the reference coefficient. The equalizer section which determines that, in fact, it holds that the reference coefficient enables itself to generate the control signals in question to the exclusion of the other equalizer sections comprising the equalizer.

REFERENCES:
patent: 3868603 (1975-02-01), Guidoux
patent: 3983540 (1976-09-01), Keller et al.
patent: 4004282 (1977-01-01), Weber et al.
patent: 4231101 (1980-10-01), Eggermont
patent: 4285061 (1981-08-01), Ho

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