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 | 597-601 |
| Number of pages | 5 |
| State | Published - 1996 |
| Event | Proceedings of the 1996 IEEE International Conference on Communications, ICC'96. Part 1 (of 3) - Dallas, TX, USA Duration: Jun 23 1996 → Jun 27 1996 |
Other
| Other | Proceedings of the 1996 IEEE International Conference on Communications, ICC'96. Part 1 (of 3) |
|---|---|
| City | Dallas, TX, USA |
| Period | 6/23/96 → 6/27/96 |
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Electrical and Electronic Engineering