Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Information Technology Journal
  Year: 2010 | Volume: 9 | Issue: 1 | Page No.: 139-145
DOI: 10.3923/itj.2010.139.145
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

IR-UWB Waveform Distortion Analysis in NLOS Localization System

Meng Jing, Zhang Nai-tong and Zhang Qin-yu

Abstract:
The Ultra-Wide Band (UWB) signal waveform distortions in Non-Line-of-Sight (NLOS) environment and its impact on localization accuracy are investigated in this study. The localization system can offer accurate position and ranging due to the fine time resolution of Impulse Radio (IR) signal. However, in completely NLOS environment, the IR-UWB signal will undergo deeply waveform distortion due to frequency dispersion, which cause inaccuracy in peak position detection in correlation receiver, consequently result in ranging error in time based localization system. Although, IR frequency dependence has already been addressed in channel modeling, in this study, the influences of material frequency properties and IR propagation distortion on completely NLOS localization system performance are taken into account through frequency domain method. Based on transient electromagnetic theory, the IR waveform distortions are compared in time domain using Inverse Fast Fourier Transform (IFFT). The NLOS ranging errors caused by both pulse distortion and geometric configuration are derived in a simple way. Numerical results shown that larger variations of material electrical parameters in UWB bandwidth lead to more severe waveform distortion and propagation loss in obstacles, which can considerably decline the ranging accuracy.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    A Study on Residual Weighting Algorithm for Mobile Localization
  •    Software Refactoring: Solving the Time-Dependent Schrodinger Equation via Fast Fourier Transforms and Parallel Programming
  •    Design of Unmanned Aerial Vehicle Space Communication Links based on DS-UWB
How to cite this article:

Meng Jing, Zhang Nai-tong and Zhang Qin-yu, 2010. IR-UWB Waveform Distortion Analysis in NLOS Localization System. Information Technology Journal, 9: 139-145.

DOI: 10.3923/itj.2010.139.145

URL: https://scialert.net/abstract/?doi=itj.2010.139.145

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 

Curve Bottom