This work was supported by the National Natural Science Foundation of China (No. 61205065), the Open Fund of State Key Laboratory of Advanced Optical Communication Systems and Networks (No. 2013GZKF031310), and the National 863 Program of China (No. 2013AA013401).
We study the decoding performance of low-density parity-check (LDPC) code based on Watermark scheme under different percentages of water-mark bits over 100 Gb/s differential quadrature phase shift keying (DQPSK) h...