Performance Improvement of optical fiber communication system by using π-rotation low-density parity-check codes
Lixia Xi, Lei Yang, Xiaoguang Zhang, Wenbo Zhang · 2013
The π-rotation LDPC codes are used in DQPSK system, the correction performance are simulated. Using this FEC, the required OSNR is decreased 3dB. With 1dB OSNR penalty, system can tolerate 200ps/nm dispersion and 23ps PMD.