Multipath interference analysis of IR-UWB systems in indoor office LOS environment

TL;DR

This paper analyzes the BER performance of IR-UWB systems in indoor office LOS environments, considering various interference sources, and highlights the significant impact of intra-symbol and multiuser interference on system performance.

Contribution

It provides a detailed variance analysis and BER expression for IR-UWB systems in indoor LOS channels, emphasizing the importance of intra-symbol interference.

Findings

Intra-symbol interference significantly degrades BER performance.

Multiuser interference further worsens system performance.

BER expressions are validated through MATLAB simulations.

Abstract

Bit error rate (BER) performance of impulse radio Ultra-Wideband (UWB) systems in the presence of intrasymbol interference, inter-symbol interference, multiuser interference and addictive white Gaussian noise (AWGN) is presented in this paper. By analyzing the indoor office LOS channel model defined by IEEE 802.15.4a Task Group and deducing the variance for intra-symbol interference (IASI), inter-symbol interference (ISI) and multiuser interference (MUI), the system BER expression is obtained and verified by MATLAB simulations. Through comparing the simulation results with and without intra-symbol interference, the conclusion that intra-symbol interference cannot be neglected is drawn-moreover, such interference will significantly decrease performance of UWB based wireless sensor networks (WSN). Then, the BER performance of UWB systems in multiuser environment is also analyzed and analysis results show that multiuser interference will further worsen the transmission performance of UWB systems.