论文标题
通过利用可重构的智能表面来朝着无处不在的定位
Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface
论文作者
论文摘要
基于接收的信号强度（RSS）技术因其简单可实施性的优势而被广泛用于无处不在定位。但是，它的准确性受到限制，因为相邻位置的RSS值可能很难区分。在这种背景下，我们建议通过可重构智能表面（RIS）实现基于RSS的新颖定位方案。通过修改RI的反射系数，对传播通道进行了编程，以使相邻位置的RSS值之间的差异可以扩大以提高定位精度。新的挑战在于选择合适的反射系数来进行高临界定位。为了应对这一挑战，我们制定了RIS辅助定位问题，并设计了一种迭代算法来解决该问题。提出的定位方案的有效性通过模拟验证。
The received signal strength (RSS) based technique is widely utilized for ubiquitous positioning due to its advantage of simple implementability. However, its accuracy is limited because the RSS values of adjacent locations can be very difficult to distinguish. Against this background, we propose the novel RSS-based positioning scheme enabled by reconfigurable intelligent surface (RIS). By modifying the reflection coefficient of the RIS, the propagation channels are programmed in such a way that the differences between the RSS values of adjacent locations can be enlarged to improve the positioning accuracy. New challenge lies in the selection of suitable reflection coefficients for high-accuracy positioning. To tackle this challenge, we formulate the RIS-aided positioning problem and design an iterative algorithm to solve the problem. The effectiveness of the proposed positioning scheme is validated through simulations.
