Joint optimizing of interleaving and LDPC decoding for burst errors in PON systems

Dear editor, Driven by the continuously increasing demand for large capacity data services, the upgrade for high speed passive optical network (PON) system is of great importance. To meet the stringent optical power budget, current PON standard systems usually use forward error correction (FEC). FEC plays an important role in the upstream transmission system of PONs because of the strict launch power from the cost-sensitive optical network unit (ONUs) and the penalties introduced by burstmode transmission [1]. Among the classical FEC codes, LDPC remains the most notable one due to its outstanding decoding performance that approaches the Shannon’s limit with a fraction of a decibel [2].