Robust Target Positioning for Reconfigurable Intelligent Surface Assisted MIMO Radar Systems
Robust Target Positioning for Reconfigurable Intelligent Surface Assisted MIMO Radar Systems
复制标题
可重构智能地面辅助MIMO雷达系统的鲁棒目标定位
DOI：
10.1109/tvt.2023.3284454
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发表时间：
2023-11
影响因子：
6.8
通讯作者：
Zhen Chen;Jie Tang;Lei Huang;Zhen-Qing He;Kai‐Kit Wong;Jiangzhou Wang
中科院分区：
文献类型：
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作者：
Zhen Chen;Jie Tang;Lei Huang;Zhen-Qing He;Kai‐Kit Wong;Jiangzhou Wang
基于波达方向（DOA）的多输入多输出（MIMO）雷达技术由于其简单易行的优点而被广泛应用于普适定位。另一方面，可重构智能表面（RIS）受到了相当大的关注，它可以部署在墙壁和物体上，以加强定位性能。然而，RIS通常不配备感知模块，这给RIS辅助定位带来了巨大的挑战。针对这一挑战，本文提出了基于到达角的雷达目标定位问题。与传统的DOA估计系统不同，本文研究了RIS在MIMO雷达系统中的有益作用，其中利用非凸$p提升函数进行DOA估计任务。通过调整RIS的反射单元，采用邻近投影迭代策略来获得可行解。理论分析和仿真结果都表明，该方案可以实现显著的定位性能，并揭示了采用RIS在定位性能方面所带来的好处。
The direction of arrival (DOA) based multiple-input multiple-output (MIMO) radar technique has been widely utilized for ubiquitous positioning due to its advantage of simple implementability. On the other hand, reconfigurable intelligent surface (RIS) has received considerable attention, which can be deployed on the walls and objects to strengthen the positioning performance. However, RIS is usually not equipped with a perception module, which results in the tremendous challenge for RIS-assisted positioning. To tackle this challenge, this article propose the fundamental problem of DOA-based target positioning in RIS-assisted MIMO radar system. Unlike conventional DOA estimation systems, the beneficial role of RIS is investigated in MIMO radar system, where a nonconvex $\ell _{p}$ promoting function is exploited to estimate DOA task. By adjusting the reflecting elements of the RIS, the proximal projection iterative strategy is developed to obtain the feasible solution. Both theoretical analysis and simulation results illustrate that the proposed scheme can achieve remarkable positioning performance and shed light on the benefits offered by the adoption of the RIS in terms of positioning performance.