Chain encoding and decoding of high speed signals

摘要

A method of recovering a value of a symbol received through an optical communications system. A multi-bit estimate of the symbol is subdivided into a first part and a second part, each part including at least one respective bit of the estimate. A most likely value of the first part is detected. The most likely value of the first part is processed using a Forward Error Correction (FEC) decoder to generate a corrected first part value, which is used to detect a most likely value of the second part. The most likely value of the second part is then processed by the FEC decoder to generate a corrected second part, which is combined with the corrected first part to recover the value of the symbol.

主权项

1. A method of recovering a value of a symbol received through an optical communications system, the method comprising:
detecting a most likely value of a first part of a multi-bit symbol estimate; processing the detected most likely value of the first part by a Forward Error Correction (FEC) decoder to generate a corrected first part value; using the corrected first part value to detect a most likely value of a second part of the multi-bit symbol estimate; and processing the detected most likely value of the second part by the FEC decoder to generate a corrected second part value; wherein the most likely value of the first part is processed by the FEC decoder simultaneously with the most likely value of the respective second part of a previous symbol estimate.