CDMA systems with random spreading in fading channels: Network capacity and power control

Junshan Zhang, Edwin K.P. Chong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Due to the fast-growing demand for network capacity in wireless networks, the characterization of network capacity has become one of the most fundamental and pressing issues. While there have been considerable efforts to study CDMA systems at both the physical layer and network layer, the network capacity of power-controlled CDMA systems with linear receivers, especially in fading environments, is not well-understood. In this paper, we study a single cell synchronous CDMA system equipped with the matched filter receiver in fading channels, and identify the network capacity for single-class systems and the network capacity region for multiple-class systems assuming known distributions of received powers of mobile users. Both the network capacity and network capacity region can be uniquely expressed in terms of the users' QoS requirements and the distributions of the received powers. We also find the tightest upper bound of the network capacity over all possible distributions of received powers, and explore the concepts of effective target SIR and effective bandwidth, which play an important role in determining the admissibility and characterizing the network capacity.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE INFOCOM'99
Subtitle of host publicationThe Conference on Computer Communications - 18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now
Pages940-947
Number of pages8
DOIs
StatePublished - Dec 1 1999
Externally publishedYes
Event18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now, IEEE INFOCOM'99 - New York, NY, United States
Duration: Mar 21 1991Mar 25 1991

Publication series

NameProceedings - IEEE INFOCOM
Volume2
ISSN (Print)0743-166X

Conference

Conference18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now, IEEE INFOCOM'99
CountryUnited States
CityNew York, NY
Period3/21/913/25/91

ASJC Scopus subject areas

  • Computer Science(all)
  • Electrical and Electronic Engineering

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