International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

A constrained equalization scheme for mobile location in non-line-of-sight environments

Zhang-Xin Chen1*, Guan Gui1,2, Qun Wan1 and Fumiyuki Adachi2            
1Department of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, 610054 China. 2Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan.
Email: [email protected]

  •  Accepted: 15 June 2011
  •  Published: 09 September 2011

Abstract

Mobile location techniques in wireless communication networks have received significant attention in recent years. One of the main problems impeding accurate location estimation is non-line-of-sight (NLOS) propagation. In this paper, we propose a novel method by incorporating constrained optimization algorithm with an equalization scheme, where the weights are derived from root mean square delay spread, which is an environment-dependent parameter describing the multipath dispersion of radio channel. Since both the channel information and constrained condition are exploited, this method can improve the location accuracy as shown in the provided simulation results.

 

Key words: Non-line-of-sight (NLOS), mobile location, constrained equalization scheme.

Abbreviation

 NLOS, Non-line-of-sight; MS, mobile station; FCC, Federal Communications Commission; CDF, cumulative distribution function; PDF, probability density function.

Copyright © 2024 Author(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

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