NDLI: Joint transmitter-receiver adaptive forward-link DS-CDMA system

Content Provider	IEEE Xplore Digital Library
Author	Li Gao Wong, T.F.
Copyright Year	2001
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL, USA (Li Gao)
Abstract	A joint transmitter-receiver adaptive DS-CDMA system over a slow flat fading forward-link channel is considered. A set of spreading sequences is designed to support all users with a uniform target SIR. This set of sequences reduces to the optimum solution of the transmitter optimization problem of choosing a set of sequences to meet the SIR target with a minimum total transmission power when the channel reduces to an AWGN channel. The MMSE receiver is employed for signal reception and receiver weights of each user are adapted independently and simultaneously without information from other users. Estimates of the MSE at each receiver are sent back to the base-station. An adaptive algorithm is designed to estimate channel parameters using the feedback information and update the spreading sequences at the base-station. The algorithm gives a set of sequences which satisfies the target SIR and has total transmission power close to the theoretical total power after a moderate number of iterations. Simulation results show that performance improvement can be achieved with the proposed joint adaptation scheme.
Starting Page	1297
Ending Page	1301
File Size	1038725
Page Count	5
File Format	PDF
ISBN	0780372069
DOI	10.1109/GLOCOM.2001.965699
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptive systems Multiaccess communication Multiple access interference Fading Transmitters Adaptive algorithm Parameter estimation AWGN channels Algorithm design and analysis Feedback
Content Type	Text
Resource Type	Article

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