Abstract
In this paper, the optimal power allocation to minimize the mean square error (MSE) in MIMO systems with and without channel knowledge at the transmitter (Tx) is investigated. Furthermore the impact of correlation is discussed. We show that for MIMO systems with no channel knowledge at the Tx correlation will increases the MSE at the receiver. This does not hold in general when channel knowledge is available at the Tx. The optimum transmit solution can then be obtained by solving a MSE minimization problem. Based on this solution we present a bit loading algorithm which matches the optimum power allocation with a set of finite modulation alphabets with the constraint to certain bit error rate requirements.
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 405-408 |
| Seitenumfang | 4 |
| Fachzeitschrift | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
| Jahrgang | 4 |
| Publikationsstatus | Veröffentlicht - 2003 |
| Extern publiziert | Ja |
| Veranstaltung | 2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hongkong Dauer: 6 Apr. 2003 → 10 Apr. 2003 |