论文标题
RIS辅助ISAC系统的联合波束形成和反射设计
Joint Beamforming and Reflection Design for RIS-assisted ISAC Systems
论文作者
论文摘要
在本文中，我们研究了在集成的传感和通信（ISAC）系统中采用可重构智能表面（RIS）的潜力。特别是，我们考虑了RIS辅助的ISAC系统，其中多用户多输入单输出（MU-MISO）通信和目标检测同时执行多用户多输入单输出（MU-MISO）。我们旨在共同设计BS的发射横梁成形和接收过滤器，以及RI的反射系数，以最大化通信使用者的总和率，同时满足最差的雷达雷达雷达输出信号 - 噪声比（SNR），传输功率约束，以及反射系数的单位模量。开发了一种基于分数编程（FP），大型化最小化（MM）和乘数的替代方向方法（ADMM）的有效迭代算法，以解决复杂的非凸问题。仿真结果验证了所提出的RIS辅助ISAC方案的优势以及已开发算法的有效性。
In this paper, we investigate the potential of employing reconfigurable intelligent surface (RIS) in integrated sensing and communication (ISAC) systems. In particular, we consider an RIS-assisted ISAC system in which a multi-antenna base station (BS) simultaneously performs multi-user multi-input single-output (MU-MISO) communication and target detection. We aim to jointly design the transmit beamforming and receive filter of the BS, and the reflection coefficients of the RIS to maximize the sum-rate of the communication users, while satisfying a worst-case radar output signal-to-noise ratio (SNR), the transmit power constraint, and the unit modulus property of the reflecting coefficients. An efficient iterative algorithm based on fractional programming (FP), majorization-minimization (MM), and alternative direction method of multipliers (ADMM) is developed to solve the complicated non-convex problem. Simulation results verify the advantage of the proposed RIS-assisted ISAC scheme and the effectiveness of the developed algorithm.
