NDLI: Capacities of single-code and multicode DS-CDMA systems accommodating multiclass services

Content Provider	IEEE Xplore Digital Library
Author	Seung Joon Lee Hyeon Woo Lee Dan Keun Sung
Copyright Year	1967
Abstract	This paper is concerned with capacities of direct-sequence (DS) code-division multiple-access (CDMA) systems accommodating multiclass services with different transmission rates and bit error rates (BER's). The capacities are expressed by inequalities to which the number of accepted calls of each class should conform. Those inequalities are necessary and sufficient conditions satisfying the requirement of the bit energy-to-interference power spectral density ratio. The optimal received power is derived to cause the least interference to other signals while maintaining the acceptable bit energy-to-interference power spectral density ratio. It is shown that if the maximally receivable power of a call of each class is identical in the multicode system and the single-code system using a variable processing gain, the capacities of both systems are also identical in nonfading channels. However, in multipath fading channels, the multicode system is shown to be better than the single-code system in terms of capacity. Capacity is also derived in a dynamic multiple-cell environment.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	376
Ending Page	384
Page Count	9
File Size	405510
File Format	PDF
ISSN	00189545
Volume Number	48
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Bit error rate Interference Gain Sufficient conditions Fading Bit rate 3G mobile communication Quality of service Delay
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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