面向大容量海洋移动通信的阵列级全双工自干扰抑制  

Array-Level Full Duplex Self-Interference Suppression for High-Capacity Maritime Mobile Communication

作　　者：林钊希 赵宏志[1] LIN Zhaoxi;ZHAO Hongzhi(National Key Laboratory of Wireless Communications,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学通信抗干扰全国重点实验室,四川成都611731

出　　处：《移动通信》2024年第11期92-97,共6页Mobile Communications

基　　金：国家自然科学基金资助项目“大功率高速跳频信号非线性数字预校正理论”,“大功率高速跳频信号非线性数字预校正理论”(62071094,62471111)。

摘　　要：为提高海洋移动通信容量,扩大通信范围,降低传输延时,提出采用双波束发射的阵列级同时收发全双工架构。针对发射阵列对接收阵列的强自干扰问题,设计一种空域数字域联合自干扰抑制算法。空域利用交替迭代算法优化发射和接收波束成形系数;数字域依据最小二乘准则求解线性滤波器的重构系数,重建和对消自干扰信号,最终将残余自干扰抑制到接收机底噪附近。最后从理论上分析了自干扰抑制算法的最大有效各向同性隔离度。理论和仿真结果表明,与传统波束成形自干扰抑制算法相比,所建议的自干扰抑制算法将收发阵列隔离度提高了86.4 dB。To increase the capacity of maritime mobile communication,extend communication coverage,and reduce transmission latency,an array-level full duplex architecture with dual-beam transmission is proposed.To address the significant selfinterference from the transmit array to the receive array,a joint spatial-domain and digital-domain self-interference suppression algorithm is developed.In the spatial domain,an alternating iterative algorithm optimizes the transmit and receive beamforming weights.In the digital domain,reconstruction coefficients of a linear filter are calculated based on the least-squares criterion to reconstruct and cancel the self-interference signal,ultimately suppressing residual self-interference to the receiver noise floor.The theoretical analysis examines the maximum achievable effective isotropic isolation of the selfinterference suppression algorithm.Both theoretical and simulation results demonstrate that the proposed self-interference suppression algorithm improves the isolation between transmit and receive arrays by 86.4 dB compared to conventional beamforming-based self-interference suppression techniques.

关 键 词：阵列级全双工 双波束发射 自干扰抑制 

分 类 号：TN911.7[电子电信—通信与信息系统]