Application of LDPC codes in atmospheric optical communication with coherent detection  

作　　者：陶金晶 张阳安 黄永清 张锦南 袁学光 李宇鹏 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Tele-communications

出　　处：《Optoelectronics Letters》2013年第2期132-134,共3页光电子快报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities (No.2009RC0401);the Young Scholar Innovation Project (Nos.2011PTB-00-31, 2012RC0407 and 2012RC0406)

摘　　要：A novel scheme employing low-density parity-check (LDPC) codes in atmospheric optical communication system is proposed. We deploy coherent detection at the receiving side in the proposed scheme. To reduce bit error rate (BER) and enhance the system performance, LDPC codes are exploited and coherent receiver is used to improve the receiving sensitivity. Experiments are implemented to evaluate the performance of the transmission system. The atmospheric channel attenuations are set to 20-30 dB/km. The coherent detection with LDPC codes can reduce the received power requirement by ~4 dBm at the BER of 10-9.A novel scheme employing low-density parity-check （LDPC） codes in atmospheric optical communication system is proposed. We deploy coherent detection at the receiving side in the proposed scheme. To reduce bit error rate （BER） and enhance the system performance, LDPC codes are exploited and coherent receiver is used to improve the receiving sensitivity. Experiments are implemented to evaluate the performance of the transmission system. The atmospheric channel attenuations are set to 20-30 dB/km. The coherent detection with LDPC codes can reduce the received power requirement by -4 dBm at the BER of 10^-9.

关 键 词：LDPC码 大气光通信 相干检测 低密度奇偶校验码 光通信系统 应用 接收灵敏度 传输系统 

分 类 号：TN929.12[电子电信—通信与信息系统] TN911.22[电子电信—信息与通信工程]