Abstract
Linear transmit filters depend on current channel state information, which is available from the uplink channel estimation in time division duplex systems. For multiple antenna elements at the transmitter, we illustrate the influence of out-dated channel estimates on link level performance for symmetric and asymmetric traffic, comparing the transmit matched, zero-forcing, and Wiener filter. A Wiener predictor is proposed to improve channel knowledge of the transmitter. We observe an inherent robustness of the transmit matched filter and explain the occurrence of a minimum in the bit error ratio at a finite SNR for the transmit Wiener filter.
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 117-120 |
| Seitenumfang | 4 |
| Fachzeitschrift | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
| Jahrgang | 5 |
| Publikationsstatus | Veröffentlicht - 2003 |
| Veranstaltung | 2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hongkong Dauer: 6 Apr. 2003 → 10 Apr. 2003 |