Joint Optimization of Beamforming and Subarray Assignment for Full-Duplex Arrays in Next Generation Broadcast Systems

IF 4.8 1区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Broadcasting Pub Date : 2024-12-25 DOI:10.1109/TBC.2024.3517141

Lang Lin;Wensheng Pan;Hongzhi Zhao;Shengfeng Zhang;Shihai Shao;Youxi Tang

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引用次数: 0

Abstract

The full-duplex (FD) technique provides spectrum-efficient transmission service by supporting uplink and downlink transmission at the same time over the same frequency band. Combined FD with multi-input multi-output (MIMO) antenna systems can improve the capability and efficiency of next-generation broadcasting to provide various services for multiple users. However, the strong self-interference (SI) coupled between the transmit and receive arrays is a significant challenge for simultaneous transmission and reception. This study considers multi-user oriented broadcast systems where the transmit array with subarray division allows simultaneous multi-beam transmission. Our objective is to mitigate SI from two aspects: 1) subarray assignment; 2) adaptive transmit beamforming (TxBF). We propose a min-SI TxBF design jointly with subarray assignment, which determines the best subarray assignment pattern and provides a closed-form solution of the optimal TxBF weight. Theoretical analysis and simulations show our design has a low algorithm complexity. Based on the measured SI channel data collected from a hardware prototype testbed, simulation results verify that the min-SI TxBF design with subarray assignment can effectively enhance SI cancelation.

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下一代广播系统中全双工阵列波束形成与子阵列分配的联合优化

全双工（full-duplex， FD）技术通过支持在同一频段内同时上行和下行传输，提供频谱高效的传输服务。FD与多输入多输出（MIMO）天线系统相结合，可以提高下一代广播的能力和效率，为多用户提供各种服务。然而，发射和接收阵列之间耦合的强自干扰（SI）是同时发送和接收的重大挑战。本研究考虑面向多用户的广播系统，其中带子阵分割的发射阵列允许同时发送多波束。我们的目标是从两个方面减轻SI: 1)子阵列分配；2)自适应发射波束形成（TxBF）。提出了一种结合子阵分配的最小si TxBF设计，确定了最佳子阵分配模式，并给出了最优TxBF权值的封闭解。理论分析和仿真结果表明，本设计具有较低的算法复杂度。基于硬件样机试验台采集的SI通道实测数据，仿真结果验证了采用子阵列分配的最小SI TxBF设计能有效增强SI对消。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Broadcasting 工程技术-电信学

CiteScore

9.40

自引率

31.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Society’s Field of Interest is “Devices, equipment, techniques and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.” In addition to this formal FOI statement, which is used to provide guidance to the Publications Committee in the selection of content, the AdCom has further resolved that “broadcast systems includes all aspects of transmission, propagation, and reception.”