Open Access

A Highly Efficient Generalized Teager-Kaiser-Based Technique for LOS Estimation in WCDMA Mobile Positioning

  • Ridha Hamila1Email author,
  • Abdelmonaem Lakhzouri2,
  • Elena Simona Lohan2 and
  • Markku Renfors2
EURASIP Journal on Advances in Signal Processing20052005:685032

https://doi.org/10.1155/ASP.2005.698

Received: 14 July 2003

Published: 20 April 2005

Abstract

Line-of-sight signal delay estimation is a crucial element for any mobile positioning system. Estimating correctly the delay of the first arriving path is a challenging topic in severe propagation environments, such as closely spaced multipaths in multiuser scenario. Previous studies showed that there are many linear and nonlinear techniques able to solve closely spaced multipaths when the system is not bandlimited. However, using root raised cosine (RRC) pulse shaping introduces additional errors in the delay estimation process compared to the case with rectangular pulse shaping due to the inherent bandwidth limitation. In this paper, we introduce a novel technique for asynchronous WCDMA multipath delay estimation based on deconvolution with a suitable pulse shape, followed by Teager-Kaiser operator. The deconvolution stage is employed to reduce the effect of the bandlimiting pulse shape.

Keywords and phrases

multipath delay estimation WCDMA mobile positioning DSP for wireless communications

Authors’ Affiliations

(1)
Etisalat University College, Emirates Telecommunications Corporation
(2)
Institute of Communications Engineering, Tampere University of Technology

Copyright

© Hamila et al. 2005