多载波扩频NOMA水声通信串行干扰消除算法  

Successive Interference Cancellation Algorithm for Multi-carrier Spread Spectrum NOMA Underwater Acoustic Communication

作　　者：周成阳 王巍[1] 普湛清 洪丹阳 张春华[1] ZHOU Chengyang;WANG Wei;PU Zhanqing;HONG Danyang;ZHANG Chunhua(The Institute of Acoustics of the Chinese Academy of Sciences,Key Laboratory of Science and Technology on Advanced Underwater Information of the Chinese Academy of Sciences,Beijing,100190,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]中国科学院声学研究所中国科学院先进水下信息技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《网络新媒体技术》2022年第3期45-52,共8页Network New Media Technology

基　　金：国家重点研发计划(深海和极地关键技术专项)。

摘　　要：非正交多址接入(NOMA)技术可以有效提高多载波扩频多用户下行水声通信的系统容量,针对非正交多址水声通信系统多用户检测过程中由多用户干扰导致的误码传播问题,提出一种适用于非正交多址水声通信的判决反馈串行干扰消除算法。算法利用重构的近端用户信号对输入信号进行修正,提高远端用户信号重建精度,减少串行干扰消除过程中的误码传播,提高系统解调性能。仿真和湖试数据处理结果表明,判决反馈串行干扰消除算法的远端、近端用户误码率均优于传统算法,能够有效抑制误码传播,提高通信质量。The technique of non-orthogonal multiple access(NOMA)is able to improve the system capacity of multi-carrier spread spectrum multi-user downlink underwater acoustic communication.In consideration of bit error propagation caused by multi-user interference in the multi-user detection process of non-orthogonal multiple access underwater acoustic communication system,a decision feedback successive interference cancellation algorithm for non-orthogonal multiple access underwater acoustic communication system is proposed.The input signal is modified by reconstructed near-end user signal to improve the reconstruction accuracy of the far end user signal.The bit error propagation in the process of serial interference cancellation is reduced and the demodulation performance of the system is improved.The analysis of simulation and lake trial proves that decision feedback serial interference cancellation algorithm acquires better bit error rates compared with traditional algorithm.The proposed algorithm can effectively confine bit error propagation and improve communication quality.

关 键 词：水声通信 多载波扩频 非正交多址接入 串行干扰消除 判决反馈 

分 类 号：TN929.3[电子电信—通信与信息系统]