| 摘要 |
A method for recovering an outgoing data signal from an incoming signal received over a transmission network is disclosed. 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 BERprov 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 Vi and a phase shifted clock signal CLj. Each value BERi,j is measured over a preset period of time Tprov for a pair Vi,~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 BERprov, for detemining the coordinates Vopt and ~opt. In the data regeneration mode, the regenerated data signal is obtained using Vopt and ~opt. |
