Multiuser Channel Estimation Using Gaussian Mixture Sigma Point Particle Filter for CDMA System

Jang Sub KIM  Ho Jin SHIN  Dong Ryeol SHIN  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.11   pp.3148-3151
Publication Date: 2006/11/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.11.3148
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
code division multiple access,  channel and time delay estimation,  nonlinear recursive filter,  

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In this paper, a multiuser receiver based on a Gaussian Mixture Sigma Point Particle Filter (GMSPPF), which can be used for joint channel coefficient estimation and time delay tracking in CDMA communication systems, is introduced. The proposed algorithm has better improved estimation performance than either Extended Kalman Filter (EKF) or Particle Filter (PF). The Cramer-Rao Lower Bound (CRLB) is derived for the estimator, and the simulation result demonstrates that it is almost completely near-far resistant. For this reason, it is believed that the proposed estimator can replace well-known filters such as the EKF or PF.