【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。更多还原

【Abstract】 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.更多还原