Space-time processing for increased capacity of wireless CDMA

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


Spatial and temporal processing are combined to increase the capacity of CDMA-based wireless communications systems. Degrees of freedom provided by space-time processing are exploited to combat both fading and co-channel interference (the near-far effect). The following methods are formulated and studied: (1) space-time diversity, (2) cascade optimum spatial - diversity (RAKE) temporal, (3) cascade optimum spatial - optimum temporal, and (4) joint domain optimum processing. It is shown that, due to its interference cancellation capability, optimum combining provides significantly better performance than diversity processing. In particular, in a typical CDMA scenario with two antennas, the joint domain optimum combining system provides at least a 30% increase in capacity over diversity processing. Optimum combining may also be applied to compensate for imperfect power control of the signals received at the base station.

Original languageEnglish (US)
Title of host publicationProfessional Program Proceedings, ELECTRO 1996
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)0780332717, 9780780332713
StatePublished - 1996
Event1996 Professional Program, ELECTRO 1996 - Somerset, United States
Duration: Apr 30 1996May 2 1996

Publication series

NameProfessional Program Proceedings, ELECTRO 1996


Conference1996 Professional Program, ELECTRO 1996
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Organizational Behavior and Human Resource Management
  • Computer Networks and Communications
  • Computer Science Applications
  • Hardware and Architecture
  • Software


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