Analytical results for capacity improvements in CDMA

Joseph C. Liberti, Theodore Rappaport

Research output: Contribution to journalArticle

Abstract

In this paper, we examine the performance enhancements that can be achieved by employing spatial filtering in code division multiple access (CDMA) cellular radio systems. The goal is to estimate what improvements are possible using narrow-beam adaptive antenna techniques, assuming that adaptive algorithms and the associated hardware to implement these systems can be realized. Simulations and analytical results are presented which demonstrate that steerable directional antennas at the base station can dramatically improve the reverse channel performance of multicell mobile radio systems, and new analytical techniques for characterizing mobile radio systems which employ frequency reuse are described using the wedge-cell geometry of [1]. We also discuss the effects of using directional antennas at the portable unit. Throughout this paper we will use phased arrays and steerable, fixed pattern antennas to approximate the performance of adaptive antennas in multipath-free environments.

Original languageEnglish (US)
Pages (from-to)680-690
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Volume43
Issue number3 pt 2
DOIs
StatePublished - Aug 1994

Fingerprint

Code Division multiple Access
Code division multiple access
Antennas
Mobile radio systems
Directional Antenna
Antenna
Spatial Filtering
Cellular radio systems
Phased Array
Antenna phased arrays
Directional patterns (antenna)
Multipath
Adaptive algorithms
Wedge
Adaptive Algorithm
Base stations
Reuse
Reverse
Enhancement
Hardware

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

Analytical results for capacity improvements in CDMA. / Liberti, Joseph C.; Rappaport, Theodore.

In: IEEE Transactions on Vehicular Technology, Vol. 43, No. 3 pt 2, 08.1994, p. 680-690.

Research output: Contribution to journalArticle

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