Rate adaptive multilevel coded modulation with high coding gain in intensity modulation direct detection optical communication
Rate adaptive multilevel coded modulation with high coding gain in intensity modulation direct detection optical communication
复制标题
强度调制直接检测光通信中具有高编码增益的速率自适应多级编码调制
DOI：
10.1117/1.oe.57.2.026107
复制
发表时间：
2018-02
影响因子：
1.3
通讯作者：
Deng'ao Li
中科院分区：
文献类型：
--
作者：
Fei Xiao;Bo Liu;Lijia Zhang;Xiangjun Xin;Qi Zhang;Qinghua Tian;Feng Tian;Yongjun Wang;Lan Rao;Rahat Ullah;Feng Zhao;Deng'ao Li
抽象。提出了一种基于固定码长的速率自适应多级编码调制（RA-MLC）方案及相应的译码方案。RA-MLC方案在发送端将多级编码调制技术与二进制线性分组码相结合。按预定规则进行比特划分、编码、可选交织和调制，然后通过100 km标准单模光纤传输。接收端通过软信息在不同层间的传递，提高了解码的准确性，从而提高了性能。使用MATLAB®在强度调制-直接检测光通信系统中进行仿真。结果表明，在光信噪比为20.7dB时，RA-MLC方案的误码率可达1 E-5。该算法减少了72%的解码器数量，在不显著增加计算时间的情况下实现了22码率自适应。在BER= 1 E-3时，编码增益提高了7.3dB。
Abstract. A rate-adaptive multilevel coded modulation (RA-MLC) scheme based on fixed code length and a corresponding decoding scheme is proposed. RA-MLC scheme combines the multilevel coded and modulation technology with the binary linear block code at the transmitter. Bits division, coding, optional interleaving, and modulation are carried out by the preset rule, then transmitted through standard single mode fiber span equal to 100 km. The receiver improves the accuracy of decoding by means of soft information passing through different layers, which enhances the performance. Simulations are carried out in an intensity modulation-direct detection optical communication system using MATLAB®. Results show that the RA-MLC scheme can achieve bit error rate of 1E-5 when optical signal-to-noise ratio is 20.7 dB. It also reduced the number of decoders by 72% and realized 22 rate adaptation without significantly increasing the computing time. The coding gain is increased by 7.3 dB at BER=1E-3.
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