標題: | BER Improved Transmit Power Allocation for D-STTD Systems with QR-Based Successive Symbol Detection |
作者: | Wu, Jwo-Yuh Kuang, Jie-Gang Lee, Ta-Sung 電信工程研究所 Institute of Communications Engineering |
關鍵字: | Space-time block codes;successive detection;power allocation;bit error rate;QR decomposition |
公開日期: | 2009 |
摘要: | We propose a BER improved power allocation scheme for D-STTD systems over i.i.d. Rayleigh fading channels under the OR-based successive detection framework. Instead of relying on BER under a fixed channel realization, the adopted design criterion is the mean BER (assuming there is no inter-layer error propagation) averaged with respect to the channel distribution. Such a design metric has two-fold advantages: (i) It is analytically tractable and is closely related to a block error probability upper pound when inter-layer error propagation occurs, and (ii) There is no need for repeated feedback of the instantaneous channel information. By exploiting a distinctive channel matrix structure unique to D-STTD systems we derive a closed-form approximate tipper bound of the considered BER metric; through minimization (if this bound an optimal power allocation scheme is obtained. Numerical simulation is used to illustrate the performance of the proposed method. |
URI: | http://hdl.handle.net/11536/14930 |
ISBN: | 978-1-4244-2353-8 |
ISSN: | 1520-6149 |
期刊: | 2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS 1- 8, PROCEEDINGS |
起始頁: | 2749 |
結束頁: | 2752 |
顯示於類別: | 會議論文 |