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İterative receiver for DS-CDMA systems in the presence of time-varying channels [Zamanla degişen kanallar varliginda DS-CDMA sistemler için iteratif alici]
(2008) Dogan H.; Panayirci E.; Çirpan H.A.; Çam G.
In this paper, we present an efficient iterative receiver structure of tractable complexity for joint multiuser detection and multichannel estimation (JDE) ofdirect-sequence code-division multiple-access systems operating in the presence of timevarying flat fading channel. The tilne-varying channel is assumed to be modeled according to a piece-wise constant channel. An optimality criterion is defined and analytical expressions for the corresponding optimized weight coefficients are given. Monte-Carlo simulations of a synchronous scenario show that the proposed JDE receiver have excellent multiuser efficiency and are robust against errors in the estimation of the channel parameters. ©2008 IEEE.