室内有金属家具环境超宽带信号传播特性研究

Study on the propagation characteristics of UWB signal in the indoor environment with metallic furniture

超宽带信号传播特性是超宽带信道理论的重要组成部分。基于时域射线跟踪方法对有金属家具的室内复杂环境中超宽带信号传播特性进行了研究,全面考虑了包括直射、反射、绕射和透射的多径传播机制,仿真获得了接收功率、均方根时延扩展等传播特性。仿真结果表明:(1)金属家具的存在使得接收功率和均方根时延扩展普遍降低;(2)在非视距传播中高次反射与绕射的作用明显,不可忽略。仿真结果可以为室内复杂环境中超宽带无线通信网络覆盖与优化提供理论依据。

The propagation characteristics of ultra-wideband（UWB） is the important part of UWB channel theory. In this paper, the propagation characteristics of UWB signal in the indoor complex environment with metallic furniture are discussed based on the time domain ray tracing method. A number of propagation parameters are analyzed by considering of muhipath propagation mechanisms including direct ray, reflection, diffraction and transmission, such as the received power, root-mean-square （RMS） delay spread, and so on. The results show that： （1）The received power and RMS delay spread are reduced as the existence of metallic furniture. （2）The multi-reflection and diffraction are important in NLOS and they can＇t be ignored. These results provide the theoretical basis for wireless communication network coverage and optimization of UWB signal in indoor complex environment.