NDLI: Pilot symbol assisted channel estimation for uplink MC-CDMA systems using parametric Channel Modeling

Content Provider	IEEE Xplore Digital Library
Author	Trivedi, A. Gupta, R.
Copyright Year	2007
Description	Author affiliation: Dept. of Inf. & Commun. Technol., ABV-Indian Inst. of Inf. Technol. & Manage., Gwalior (Trivedi, A.)
Abstract	In order to attain near-single user performance in uplink multicarrier code division multiple access (MC-CDMA) systems, multiuser detection (MUD) methods may be employed which rely on simultaneous estimation of the channel frequency response of multiple users. In this paper, performance of a MC-CDMA system employing minimum mean-square error (MMSE) MUD at receiver, is evaluated using two pilot symbol assisted (PSA) channel estimation schemes: the maximum likelihood (ML) estimation and the MMSE estimation. In simplified design where multipath fading channels are assumed to have sample-spaced path time delays, the MMSE estimator (MMSEE) slightly outperforms the ML estimator (MLE) at low signal to noise ratios (SNR). At intermediate and high SNRs, both estimators show almost identical performance. We find that the MMSEE provides significant performance gain when path delays are not sample-spaced and channel estimation is carried out considering a general parametric model of the multipath channel.
Starting Page	989
Ending Page	993
File Size	128538
Page Count	5
File Format	PDF
ISBN	9781424409761
DOI	10.1109/ISCIT.2007.4392159
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-17
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiuser detection Multicarrier code division multiple access Maximum likelihood estimation Maximum likelihood detection Channel estimation Delay estimation Frequency estimation Frequency response Signal design Signal to noise ratio
Content Type	Text
Resource Type	Article

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