Analytical results for capacity improvements in CDMA

Joseph C. Liberti, Theodore S. Rappaport

Research output: Chapter in Book/Report/Conference proceedingChapter


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)
Title of host publicationAdaptive Antennas for Wireless Communications
PublisherWiley-IEEE Press
Number of pages11
ISBN (Electronic)9780470544075
ISBN (Print)0780360168, 9780780360167
StatePublished - Jan 1 2009

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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