Open Access

Channel Tracking Using Particle Filtering in Unresolvable Multipath Environments

  • Tanya Bertozzi1, 2Email author,
  • Didier Le Ruyet2,
  • Cristiano Panazio2 and
  • Han Vu Thien2
EURASIP Journal on Advances in Signal Processing20042004:705208

https://doi.org/10.1155/S1110865704409019

Received: 1 May 2003

Published: 7 November 2004

Abstract

We propose a new timing error detector for timing tracking loops inside the Rake receiver in spread spectrum systems. Based on a particle filter, this timing error detector jointly tracks the delays of each path of the frequency-selective channels. Instead of using a conventional channel estimator, we have introduced a joint time delay and channel estimator with almost no additional computational complexity. The proposed scheme avoids the drawback of the classical early-late gate detector which is not able to separate closely spaced paths. Simulation results show that the proposed detectors outperform the conventional early-late gate detector in indoor scenarios.

Keywords and phrases

sequential Monte Carlo multipath channels importance sampling timing estimation

Authors’ Affiliations

(1)
Diginext
(2)
Conservatoire National des Arts et Métiers (CNAM)

Copyright

© Bertozzi et al. 2004