Impact of Multipath Interference on the Performance of an UWB Fast Acquisition System for Ranging in an Indoor Wireless Channel

Abstract

In this paper, the effects of multipath interferences on the performance of a multiuser ultra-wideband (UWB) fast acquisition system operating in an underground indoor fading channel are evaluated and compared. Various pulse shapes are considered with different scenarios of interference and Gaussian noise in extensive Monte-Carlo simulations. The results show the 6 th order Gaussian derivative as the most suitable pulse shape for this new UWB fast acquisition system suggested for ranging in a peculiar confined environment, offering very acceptable positioning error range at high levels of noise and interference, while also yielding greatly reduced complexity and acquisition time.

A Compact Test System for Simulating Multipath Interference

“…This results in phase changes which can constructively or destructively interfere with the signal which is maximized if the path length difference is a multiple of a quarter wavelength. Experimental tests in an anechoic chamber using multiple antennas [1], and Monte Carlo simulations [2] and have been used to measure the effect of multipath interference in direct path and non-line-of-sight (NLOS) indoor environments.…”