Space-time processing for increased capacity of wireless CDMA

X. Bernstein, Alexander Haimovich

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

21 Scopus citations

Abstract

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 publicationIEEE International Conference on Communications
PublisherIEEE
Pages597-601
Number of pages5
Volume1
StatePublished - Jan 1 1996
EventProceedings of the 1996 IEEE International Conference on Communications, ICC'96. Part 1 (of 3) - Dallas, TX, USA
Duration: Jun 23 1996Jun 27 1996

Other

OtherProceedings of the 1996 IEEE International Conference on Communications, ICC'96. Part 1 (of 3)
CityDallas, TX, USA
Period6/23/966/27/96

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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