NDLI: Maximizing system capacity in a sub-symbol based DS-CDMA multiuser detector

Content Provider	IEEE Xplore Digital Library
Author	Uzmi, Z.A. Narasimha, M.J.
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng., Stanford Univ., CA, USA (Uzmi, Z.A.)
Abstract	A sub-symbol based multiuser detector for DS-CDMA systems was proposed in Uzmi and Mujtaba (1999). This paper addresses the optimization of such detectors to maximize the system capacity. It is shown that the maximum number of simultaneous users supported in a DS-CDMA system using a sub-symbol scheme can be increased by the proper selection of certain thresholds delineated in Uzmi and Mujtaba, and by imposing moderate synchronization requirements on the transmitters. It is also shown that, in a synchronized environment, performing with only one sub-symbol is enough for accommodating a fairly large number of users, if the system signal to noise ratio (SNR) is medium to high. It has been verified through simulations that the maximum number of simultaneous users depends on the degree of synchronism and is approximately given by the number of chips in the longest sub-symbol.
Starting Page	15
Ending Page	19
File Size	489019
Page Count	5
File Format	PDF
ISBN	0780364511
DOI	10.1109/GLOCOM.2000.891652
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-11-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Multiuser detection Detectors Signal to noise ratio Multiple access interference Bit error rate Base stations Transmitters Decorrelation Standardization
Content Type	Text
Resource Type	Article

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