Forward error correction assisted receiver optimization

Details Forward error correction assisted receiver optimization Forward error correction assisted receiver optimization

1996-12-19

1999-04-20

Chung, Phung M.

Excavating

371 35, G06F 1100

Patent

active

058963910

ABSTRACT:
A method for recovering an outgoing data signal from an incoming signal received over a transmission network. The method provides for preparing a bit error rate (BER) map for a data regenerator, determining, on the BER map, an optimal operation point for a provisioned BER.sub.prov value, and monitoring the data regenerator to function in the optimal operation point for providing a regenerated data signal. In addition, the errors in the regenerated data signal may be further corrected using current forward error correction circuitry. To prepare a BER map, the data regenerator operates in an error mapping mode, wherein the incoming signal is decoded using a slicing level V.sub.i and a phase shifted clock signal CL.sub.j. Each value BER.sub.i,j is measured over a preset period of time T.sub.prov for a pair V.sub.i, .phi..sub.j and stored in a memory. The BER maps may be prepared once a day or at any other suitable interval. In the optimization mode, the operation point for the regenerator is calculated for a BER contour corresponding to the provisioned BER.sub.prov, for determining the coordinates V.sub.opt and .phi..sub.opt. In the data regeneration mode, the regenerated data signal is obtained using V.sub.opt and .phi..sub.opt.

REFERENCES:
patent: 4097697 (1978-06-01), Harman
patent: 4799790 (1989-01-01), Tsukamoto
patent: 4823360 (1989-04-01), Tremblay et al.
patent: 5418789 (1995-05-01), Gersbach et al.

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