Optimal Power Allocation for Space-time Coded OFDM UWB Systems
In the last years, a lot of attention has been devoted to ultra wideband (UWB) systems. The multi-antenna and/or multi-carrier UWB transceiver designs have been well-documented.Compared with great progress at physical layer, the corresponding medium access control (MAC) layer protocol designs are naturally placed on the schedules. In this paper, we focus on the optimal power allocation scheme, which is an integral part of the MAC layer protocol design, for UWB orthogonal frequency-division multiplexing (OFDM) transmissions with space-time code (STC). To maximize the capacity, two kinds of power allocation schemes were presented based on perfect CSI or partial CSI respectively in frequency-selective UWB channels. And our scheme can be easily extended to multi-band system. The analysis and numerical results show good performance.
UWB OFDM STC power allocation channel-state information
Junfang WANG Guangxi Zhu Jiang JIN
Dept.of Electronics & Information Huazhong University of Science and Technology Wuhan, China
国际会议
武汉
英文
169-172
2005-09-23（万方平台首次上网日期，不代表论文的发表时间）