空基激光通信大气湍流传输的HARQ方案性能分析  

Performance analysis on HARQ schemes for air-based laser communications in turbulent transmissions

作　　者：王娟[1] 武文周 WANG Juan;WU Wenzhou(Academy of Opto-Electronics,China Electronics Technology Group Corporation(AOE CETC),Tianjin 300308,China;Optical Communication Research&Development Center,The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China;Hebei Key Laboratory of Photonic Information Technology and Application,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司光电研究院,天津300308 [2]中国电子科技集团公司第五十四研究所,光通信研发中心,河北石家庄050081 [3]河北省光子信息技术与应用重点实验室,河北石家庄050081

出　　处：《光学技术》2024年第4期484-491,共8页Optical Technique

摘　　要：大气湍流信道所引起的激光链路信号功率随机衰落是影响空基激光链路通信质量的重要因素。针对空基激光通信链路受大气湍流影响在短时间随机衰落导致的通信性能恶化情况开展HARQ传输能力仿真和性能分析。分析了不同编码码率、重传帧结构对误码纠错性能的影响,通过调整HARQ传输策略,对误码率性能改善以及通信带宽利用率等传输性能结果进行比较。根据仿真结果可知,较精细化的重传控制以及改变纠错编码码率能够有效提高激光链路的误码纠错能力。通过平衡HARQ重传过程中的编码码率和重传帧长度,可以在不影响链路传输效率的情况下明显改善激光链路传输性能。Atmospheric turbulence channels cause random fading of laser link signal power,which is a significant factor affecting the quality of air-based laser communication links.Simulation and performance analysis regarding the degradation of communication performance is conducted due to short-term random fading caused by atmospheric turbulence in air-based laser communication links.The effects of different encoding rates and retransmission frame structures on error correction performance are analyzed.By adjusting the HARQ transmission strategy,it compares the results of transmission performance improvements such as bit error rate and communication bandwidth utilization rate.According to the simulation results,refined retransmission control and changing error correction encoding rates can effectively improve the error correction capability of laser links.By balancing the coding rate and the length of retransmission frames during the HARQ retransmission process,it is possible to significantly improve laser link transmission performance without affecting link transmission efficiency.

关 键 词：空基激光通信 大气湍流 混合自动重发请求 

分 类 号：TN929.12[电子电信—通信与信息系统]