| Publisher | KTH - Royal Institute of Technology | ||
|---|---|---|---|
| Format | 146.6KB PDF | Date added | 10 Feb 2006 |
| Topics | Mobile - Wireless Communications | ||
| Downloads | 87 | ||
This paper attempts to compare the system downlink performance of a smart antenna scheme for OFDMA that utilizes channel covariance information with an opportunistic multi-antenna scheme for OFDMA that uses fast limited feedback of the instantaneous channel condition. The schemes are evaluated by means of simulations in a low load scenario and also compared to a simple HSDPA-like scheme. The smart antenna method manages to utilize the multiple antennas better than the opportunistic scheme. Furthermore, the performance of the schemes is inserted into a cost model that assumes that the receivers are relays that use short-range technologies to communicate with user equipments.
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