Apparatus and method for equalizing for amplitude jitter

Details Apparatus and method for equalizing for amplitude jitter Apparatus and method for equalizing for amplitude jitter

1994-10-04

1995-07-18

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375371, H03H 730

Patent

active

054348846

ABSTRACT:
A modem (100) includes an equalizer for equalizing a received signal (10) for amplitude jitter distortion. The received signal includes modulated symbols based on a predetermined constellation of points, each point representing a symbol. The modem first extracts a modulated symbol to provide an extracted symbol, R(k), which includes amplitude jitter distortion. The modem then identifies a signal point P.sub.n (k) of the predetermined constellation corresponding to the extracted symbol. Further, the modem determines an error signal (76) based on the amplitude jitter distortion, and then uses the error signal to compensate subsequent extracted symbols for the amplitude jitter distortion.

REFERENCES:
patent: 4027250 (1977-05-01), Lang
patent: 4646325 (1987-02-01), Zuranski et al.
patent: 4689804 (1987-08-01), Srinivasagopalan
patent: 4777640 (1988-10-01), Turner et al.
patent: 4953186 (1990-08-01), Levy et al.
patent: 4985900 (1991-01-01), Rhind et al.

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