期刊论文详细信息
EURASIP Journal on Advances in Signal Processing
Information and sensing beamforming optimization for multi-user multi-target MIMO ISAC systems
Research
Minghe Zhu1  Tsung-Hui Chang1  Lei Li1  Shuqiang Xia2 
[1] School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518100, Shenzhen, China;Shenzhen Research Institute of Big Data, 518100, Shenzhen, China;ZTE Corporation, 518057, Shenzhen, China;State Key Laboratory of Mobile Network and Mobile Multimedia Technology, 518055, Shenzhen, China;
关键词: MUMT-MIMO ISAC;    Joint beamforming;    CRB;    Sum rate;    WMMSE;    Semidefinite relaxation;    Fractional programming;   
DOI  :  10.1186/s13634-023-00972-w
 received in 2022-08-20, accepted in 2023-01-05,  发布年份 2023
来源: Springer
PDF
【 摘 要 】

Integrated sensing and communication (ISAC) has been envisioned as a key enabler in the next-generation wireless networks. In this paper, we consider the joint information and sensing beamforming design in a multi-user and multi-target multi-input multi-output ISAC system, where a transmit BS and a sensing BS collaborate to sense targets, and the transmit BS sends information streams to communication users at the same time. To optimize the sensing performance and guarantee the communication throughput, we formulate a joint beamforming design problem to minimize the trace of the weighted Cramer–Rao bound of target parameters subject to the sum-rate constraint. The problem is challenging to solve due to the intricate non-convex objective function and constraints. We firstly exploit the weighted mean square error minimization (WMMSE) and semidefinite relaxation (SDR) techniques to devise a WMMSE–SDR algorithm that can achieve a KKT point of the problem. The SDR can be shown to be tight for a subproblem in the WMMSE–SDR algorithm, which implies zero duality for the subproblem. Based on this property and fractional programming techniques, we further reformulate the beamforming problem as a min–max form with simple constraints which then can be efficiently solved by first-order min–max optimization algorithms. Finally, the proposed algorithms are evaluated extensively in simulations. Numerical results show that both proposed algorithms can achieve promising performance in sensing and communication, and the low-complexity algorithm has a significantly reduced computation time.

【 授权许可】

CC BY   
© The Author(s) 2023

【 预 览 】
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