On estimating temporal and spatial channel parameters for DS-CDMA system over multipath Rayleigh fading channels

K. Wang, H. Ge

Research output: Contribution to journalConference articlepeer-review

Abstract

In this paper, we develop an approximate maximum likelihood (ML) method for joint estimation of time delays and directions-of-arrivals (DOA's) for the direct-sequence code-devision multiple-access (DS-CDMA) systems over the multipath Rayleigh fading channels. In developing the proposed estimation scheme, we model the known training sequence of the desired user as the desired signal and the multiple access interferences (MAI)-plus-AWGN as unknown colored Gaussian noise uncorrelated with the desired signal. To reduce computational complexity, a fast algorithm realization is proposed taking advantage of the ridge structure of the objection function. Analytical and simulation results are presented to illustrate the performance in comparison with the Cramer-Rao bounds (CRBs). It is shown that the proposed algorithm is near-far resistant for both time delay and DOA estimations, with almost no performance loss compared with CRBs.

Original languageEnglish (US)
Pages (from-to)2193-2196
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume4
StatePublished - 2001
Event2001 IEEE Interntional Conference on Acoustics, Speech, and Signal Processing - Salt Lake, UT, United States
Duration: May 7 2001May 11 2001

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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