System and method for non-causal channel equalization using...

Details System and method for non-causal channel equalization using... System and method for non-causal channel equalization using...

2005-07-05

2005-07-05

Torres, Joseph D. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Data pulse evaluation/bit decision

C714S775000, C714S780000

Reexamination Certificate

active

06915464

ABSTRACT:
A system and a method are provided for non-causal channel equalization using error statistics. The method comprises: receiving a non-return to zero (NRZ) data stream input encoded with forward error correction (FEC); establishing a plurality of thresholds to generate a first bit estimate; comparing the first bit estimate in the data stream to a second bit value received prior to the first bit; comparing the first bit estimate to a third bit value received subsequent to the first bit; in response to the comparisons, determining the value of the first bit; FEC decoding the determined first bit value; and, using FEC error statistics to adjust the thresholds by evaluating the number of errors associated with a plurality of three-bit sequence combinations.

REFERENCES:
patent: 3670304 (1972-06-01), Andresen et al.
patent: 5057946 (1991-10-01), Sugiyama
patent: 5781588 (1998-07-01), Abe et al.
patent: 6188737 (2001-02-01), Bruce et al.

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