Space-time processing for increased capacity of wireless CDMA

Research output: Contribution to conferencePaperpeer-review

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)
Pages131-135
Number of pages5
StatePublished - Jan 1 1996
Externally publishedYes
EventProceedings of the ELECTRO'96 - Somerset, NJ, USA
Duration: Apr 30 1996May 2 1996

Other

OtherProceedings of the ELECTRO'96
CitySomerset, NJ, USA
Period4/30/965/2/96

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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