Multiuser channel estimation for CDMA systems over doubly selective fading channels

Jingxian Wu, Chengshan Xiao, Khaled Letaief

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, a pilot assisted minimum mean square error multiuser channel estimation algorithm is proposed for quasi-synchronous CDMA systems. The doubly selective multiuser fading channel is represented as a time-varying chip-spaced tapped delay line filter with correlated filter taps. The multiuser channel tap coefficients at pilot symbol positions are estimated under the MMSE criterion with the help of the channel tap correlation matrix, which can be jointly estimated with the filter tap timing with a novel iterative method. Simulations show that the channel tap correlation is critical to the performance of the channel estimation, and the channel taps at different delays cannot be assumed uncorrelated for systems experiencing doubly selective fading.

Original languageEnglish
Pages (from-to)1177-1181
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume58
Issue number2
Publication statusPublished - 2003
Externally publishedYes

Fingerprint

Channel Estimation
Code Division multiple Access
Channel estimation
Fading Channels
Fading channels
Code division multiple access
Minimum Mean Square Error
Filter
Delay Line
Correlation Matrix
Estimation Algorithms
Fading
Timing
Time-varying
Chip
Iteration
Electric delay lines
Coefficient
Iterative methods
Mean square error

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Multiuser channel estimation for CDMA systems over doubly selective fading channels. / Wu, Jingxian; Xiao, Chengshan; Letaief, Khaled.

In: IEEE Vehicular Technology Conference, Vol. 58, No. 2, 2003, p. 1177-1181.

Research output: Contribution to journalArticle

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