NDLI: Constrained Power Control to Enhance the Capacity of Slotted DS-CDMA Cellular Systems

Content Provider	Springer Nature Link
Author	Chai, Chin Choy Zhou, Kainan Chew, Yong Huat Li, Ke
Copyright Year	2008
Abstract	We propose and study the constrained power control scheme for direct sequence code division multiple access (DS-CDMA) systems supporting voice and data services. In the proposed scheme, the voice users are subject to the conventional power control, while the data users are subject to distance dependent transmit power constraint. Several power control profiles for data users are suggested to reduce interference within its own and neighboring cells. For given delay and outage probability requirements, we present an analytical framework to analyze the number of users that can be supported by the proposed scheme. The results are compared to the conventional power control scheme, where no such constraint is imposed. We derive new closed form expression for the interference correction factor for the constrained power control scheme. In addition, we show that the total interference power can be approximated by the log-normal distribution, and we evaluate the mean and variance of the log-normal distribution analytically. We also derive the distribution of the signal-to-noise ratios for voice and data users, which is useful in evaluating the user capacity for slotted DS-CDMA cellular systems with both delay and power constraints.
Starting Page	181
Ending Page	206
Page Count	26
File Format	PDF
ISSN	09296212
Journal	Wireless Personal Communications
Volume Number	50
Issue Number	2
e-ISSN	1572834X
Language	English
Publisher	Springer US
Publisher Date	2008-09-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Constrained power control Log-normal distribution Delay constraint Outage probability Code division multiple access (CDMA) Computer Communication Networks Signal, Image and Speech Processing Communications Engineering, Networks
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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