智能反射面定位发展现状及其在非视距定位中的应用

在未来的通信网络中，复杂的信道环境是制约定位性能的主要因素之一。智能反射面是近年提出的一种具有特殊电磁特性的人工二维表面，可以控制电磁波的吸收、反射与折射特性，从而实现对信道的调控，具有广阔的应用前景。首先介绍了该技术的发展现状，从智能反射面的电磁特性及其在通信定位中的应用等方面归纳分析了其现阶段的研究成果，然后针对非视距应用提出了一种基于智能反射面的定位方法。通过仿真验证了该方法的有效性，在不同的发射功率下均实现了定位误差降低50%以上，并且提高了定位鲁棒性，实现了对波束盲区的覆盖。最后，从新型定位场景、通信技术结合、资源分配和人工智能应用４个角度，对智能反射面定位技术的研究进行了展望。

The Development Status of Intelligent Reflecting Surface and Its Application in NLOS Positioning

In the future communication network, the complex channel environment is one of the main factors limiting the positioning performance. Intelligent reflecting surface is an artificial two-dimensional surface with special electromagnetic characteristics proposed in recent years, which can control the absorption, reflection and refraction characteristics of electromagnetic waves to achieve the regulation of the channel and has broad application prospects. This paper firstly introduces the development status of this technology, summarizes and analyzes the current research results in terms of the electromagnetic characteristics of the intelligent reflecting surface and its application in communication positioning, and then proposes a positioning method based on the intelligent reflecting surface for non-line of sight applications. The effectiveness of the method is verified by simulation, the positioning error is reduced by more than 50% with different transmitting power, the positioning robustness is improved, and the blind area of the beam is covered. Finally, the research on intelligent reflecting surface positioning technology is prospected in four aspects of new positioning scenarios, communication technology combination, resource allocation and artificial intelligence application.