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Channel Estimation and Optimal Power Allocation for a Multiple-Antenna OFDM System
Overview This paper proposes combining channel estimation and optimal power allocation approaches for a multiple-antenna orthogonal frequency division multiplexing (OFDM) system in high-speed transmission applications. A least-square channel estimation approach is developed, the performance bound of the estimator is derived, and the optimal training sequences for initial channel acquisition are investigated. Based on the channel estimates, the optimal power allocation solution, which maximizes the bandwidth efficiency, is derived under power and quality of service (QoS) (symbol error rate) constraints. It is shown that combining channel tracking and adaptive power allocation can dramatically enhance the outage capacity of an OFDM multiple-antenna system when severing fading occurs.
| Publisher | Regents of the University of California | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | January 2002 | Downloads | 3 |
| Format | White Papers | ||
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