Abstract
The optimal transmit-beam number and power allocation over generic correlated multiple-input multiple-output (MIMO) Rayleigh fading channels are investigated. By fully exploiting the algebraic structures and properties of the optimization problem, we obtain a procedure for determining the thresholds of optimal beam number and derive a set of elementary equations for optimal power allocation, which can be efficiently solved by using a Broyden-like method. A closed-form criterion for the optimality of beamforming is also proposed. Numerical results are presented for illustration.
| Original language | English |
|---|---|
| Pages (from-to) | 2255-2259 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Communications |
| Volume | 57 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2009 |
| Externally published | Yes |
Keywords
- Channel capacity
- Covariance feedback
- Multipleantenna systems
- Transmit/receive correlation
- Transmitter optimization
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