MM-LoRa-Mod:一种应用于水声通信的非相干LoRa调制方案  

MM-LoRa-Mod:A non-coherent LoRa modulation scheme for underwater acoustic communications

作　　者：余骁 徐位凯[1] 孙海信[1] 刘祺 YU Xiao;XU Weikai;SUN Haixin;LIU Qi(Department of Information and Communication Engineering,Xiamen University,Xiamen 361005,China;China Ship Research and Development Academy,Beijing 100192,China)

机构地区：[1]厦门大学信息与通信工程系,福建厦门361005 [2]中国舰船研究院,北京100192

出　　处：《电信科学》2024年第9期13-27,共15页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.62271426,No.61871337)。

摘　　要：LoRa(long-range)是一种新兴的低功耗广域网技术。面对频率选择性衰落多径信道等挑战,现有LoRa方案存在数据速率低、系统复杂度高等问题。针对以上问题,提出一种基于多模的LoRa(MM-LoRa-Mod)调制方案,该方案通过多路复用线性调频信号的频移来传输信息,显著提高了数据速率。此外,针对复杂水声通信场景,提出一种低复杂度的MM-LoRa-Mod非相干检测算法。通过评估MM-LoRa-Mod在多径信道、Watermark仿真平台以及浅海水声信道下的误码率性能,所提方案展现了优异的抗多径衰落和抗多普勒频移性能,表明MM-LoRa-Mod在水声通信场景具备高可靠性。LoRa(long-range)is an emerging low-power wide-area network technology.Facing challenges such as frequency selective fading multipath channels,existing LoRa schemes are subjected to issues like low data rates and high system complexity.To address these issues,a multi-mode LoRa(MM-LoRa-Mod)based modulation scheme was proposed.The frequency shifts of the multiple multiplexed chirp signals for information transmission were utilized in this scheme,thereby significantly enhancing data rates.Additionally,for underwater acoustic communication scenarios,a low-complexity non-coherent detection algorithm for MM-LoRa-Mod was introduced.Through the evaluation of MM-LoRa-Mod’s bit error rate performance in multipath channels,Watermark underwater acoustic channels,and shallow water acoustic channels,excellent anti-multipath fading and anti-Doppler frequency shift ca-pabilities were demonstrated,indicating the high reliability of MM-LoRa-Mod in underwater acoustic communication scenarios.

关 键 词：LoRa 水下物联网 线性调频扩频调制 水声通信 

分 类 号：TN911[电子电信—通信与信息系统]