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 language | English (US) |
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| Pages | 131-135 |
| Number of pages | 5 |
| State | Published - 1996 |
| Externally published | Yes |
| Event | Proceedings of the ELECTRO'96 - Somerset, NJ, USA Duration: Apr 30 1996 → May 2 1996 |
Other
| Other | Proceedings of the ELECTRO'96 |
|---|---|
| City | Somerset, NJ, USA |
| Period | 4/30/96 → 5/2/96 |
All Science Journal Classification (ASJC) codes
- General Engineering