LDPC编码调制系统中基于反馈LLR均值的迭代解调／译码算法-LDPC coded modulation systems based on iterative feedback from the mean LLR demodulator/decoding algorithm

在相干光中使用自适应LDPC编码技术，该技术能是使用远距离传输。-The use of adaptive LDPC coding technique in coherent light, the technology can be used in long distance transmission.