Research on path loss and shadow fading of ultra wideband simulation channel

Zhao Hongmei,Yao Hailong,Guo Shuting

doi:10.1177/1550147716679847

Abstract

The uniform geometrical theory of diffraction and ray tracing technique is used to simulate ultra wideband signal multipath propagation characteristics. The simulation model covers indoor office and outdoor corridor with thick wall and metal doors. The range of path loss exponent of distance is obtained by regression analysis, and the lognormal distribution about shadowing fading is got by the fitting and test. The distance-dependence path loss in the indoor and indoor to the corridor present lognormal distribution characteristics. Through the comparative research, the signal of the transmission metal door has a decisive influence on the corridor environment.

Highlights

In the recent years, plentiful scenarios channel were measured using different measurement methods because of the limitations of ultra wideband (UWB) channel standard model IEEE802.15.3a and IEEE802.15.4a
This article is based on the ray tracing and uniform geometrical theory of diffraction (UTD) to simulate model in complex environments, analyzes path loss exponents and shadow fading characteristics for indoor and indoor to corridor with thick wall and metal door environments
The path loss of UWB signal indoor obeys the lognormal distribution with the loss exponents ranging from 1.37 to 2.35, and the standard deviation of the shadow fading changing from 4.35 to 6.67

Summary

Introduction

Plentiful scenarios channel were measured using different measurement methods because of the limitations of ultra wideband (UWB) channel standard model IEEE802.15.3a and IEEE802.15.4a. These studies show that the path loss of distance-dependent large-scale fading is in accord with the lognormal distribution. There are few researches on the large-scale channel characteristics that signal transmit thick wall and the metal door to the corridor environment.

Results

Conclusion