Performance of multiuser detection with decision-directed channel estimation

TitlePerformance of multiuser detection with decision-directed channel estimation
Publication TypeConference Paper
Year of Publication2003
AuthorsMa, Y., R. Schober, S. Pasupathy, and T. J. Lim
Conference NameGlobal Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Pagination247 - 251 Vol.1
Date Publisheddec.
Keywordsbit error probability, channel estimation, code division multiple access, decision feedback, decision variable-based moment generating function, decision-directed channel estimation, doubly-selective Rician-fading CDMA channels, error statistics, Gaussian processes, general linear coherent multiuser receiver, Markov chain steady-state analysis, Markov processes, multiuser detection, multivariate Gaussian approximation, Rician channels

In this paper, we study the performance of a general linear coherent multiuser receiver with decision-directed channel estimation (DDCE) for doubly-selective Rician-fading CDMA channels. Employing the multivariate Gaussian approximation (MGA) and a decision variable-based moment generating function (DV-MGF) approach, both exact and low-complexity approximate bit error probability (BEP) formulas for a linear detector with genie-aided DDCE are provided. Furthermore, using a Markov chain steady-state analysis, a tight BEP approximation for non-ideal DDCE is provided taking into account the error propagation in the decision feedback. Some new findings are illustrated by simulation results.


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