Soft-Decision LDPC Turbo Decoding for DQPSK Modulation in Coherent Optical Receivers

• DOI: 10.1364/ecoc.2011.we.10.p1.70
• Publication Date: 2013-04-09T16:57:43Z
• Authors: Fan Yu; Nebojsa Stojanovic; Fabian N. Hauske; Deyuan Chang; Gerhard Bauch; Doris Pflueger; Changsong Xie; Yu Zhao; Zhiyu Xiao; Liangchuan Li; Xiaogeng Xu; Qianjin Xiong
• Keywords: Turbo code; Turbo; Forward error correction

We investigate DQPSK modulation combined with QC-LDPC coding. By applying iterative demodulation and soft-decision decoding, the differential decoding penalty is reduced by 2.05dB offering an attractive solution for coherent optical systems FEC.