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

Received: 1 May 2003

Published: 7 November 2004


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 Carlomultipath channelsimportance samplingtiming estimation

Authors’ Affiliations

Diginext, Aix-en-Provence Cedex, France
Conservatoire National des Arts et Métiers (CNAM), Paris Cedex 3, France


© Bertozzi et al. 2004