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arXiv · 2409.02797

Joint Beamforming for Backscatter Integrated Sensing and Communication

Zongyao Zhao·Tiankuo Wei·Zhenyu Liu·Xinke Tang·Xiao-Ping Zhang·Yuhan Dong
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Abstract

Integrated sensing and communication (ISAC) is a key technology of next generation wireless communication. Backscatter communication (BackCom) plays an important role for internet of things (IoT). Then the integration of ISAC with BackCom technology enables low-power data transmission while enhancing the system sensing ability, which is expected to provide a potentially revolutionary solution for IoT applications. In this paper, we propose a novel backscatter-ISAC (B-ISAC) system and focus on the joint beamforming design for the system. We formulate the communication and sensing model of the B-ISAC system and derive the metrics of communication and sensing performance respectively, i.e., communication rate and detection probability. We propose a joint beamforming scheme aiming to optimize the communication rate under sensing constraint and power budget. A successive convex approximation (SCA) based algorithm and an iterative algorithm are developed for solving the complicated non-convex optimization problem. Numerical results validate the effectiveness of the proposed scheme and associated algorithms. The proposed B-ISAC system has broad application prospect in IoT scenarios.

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Zongyao Zhao, Tiankuo Wei, Zhenyu Liu, Xinke Tang, Xiao-Ping Zhang, Yuhan Dong. 2024-09-04. Joint Beamforming for Backscatter Integrated Sensing and Communication. https://arxiv.org/abs/2409.02797

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