Error detection/correction and fault detection/recovery – Pulse or data error handling – Data pulse evaluation/bit decision
Reexamination Certificate
2006-04-04
2006-04-04
Torres, Joseph (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Data pulse evaluation/bit decision
C714S754000, C714S776000
Reexamination Certificate
active
07024599
ABSTRACT:
A system and method are provided for non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing thresholds to distinguish a first bit estimate; comparing the first bit estimate in the NRZ data stream to a second bit value received prior to the first bit, and a third bit received subsequent to the first bit; in response to the comparisons, determining the value of the first bit; tracking the NRZ data stream inputs in response to sequential bit value combinations; maintaining long-term averages of the tracked NRZ data stream inputs; adjusting the thresholds in response to the long-term averages; and, offsetting the threshold adjustments to account for the asymmetric noise distribution. Two methods are used to offset the threshold adjustments to account for the asymmetric noise distribution: forward error correction (FEC) decoding and tracking the ratio of bit values.
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The Authoritative Dictionary of IEEE Standards Terms, Seventh Edition, p. 742.
Castagnozzi Daniel M.
Conroy Keith Michael
Sorgi Alan Michael
Yuan Warm Shaw
Applied Micro Circuits Corporation
Maliszewski Gerald
The Law Office of Gerald Maliszewski
Torres Joseph
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