System and method for adjusting a non-return to zero data...

Details System and method for adjusting a non-return to zero data... System and method for adjusting a non-return to zero data...

2006-09-12

2006-09-12

Baker, Stephen M. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error count or rate

C341S068000, C714S709000

Reexamination Certificate

active

07107499

ABSTRACT:
A state machine method and system are provided for determining non-causal channel equalization thresholds. The method comprises: receiving a non-return to zero (NRZ) data stream encoded with forward error correction (FEC); setting x=0; in State0, adjusting a third threshold (Vopt) in response to corrected bit errors; if x=0, setting a first and second threshold equal to the third threshold; in State1, if x=0, simultaneously adjusting the first threshold and the second threshold, to minimize the total number of corrected bit errors; in State2, following State0, adjusting the first threshold, independent of the second threshold, to minimize the total number of errors; in State3, following State0, adjusting the second threshold, independent of the first threshold, to minimize the total number of errors; and, adding 1 to x and returning to State0.

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