Optimal power allocation for space-time coded OFDM UWB systems
Optimal power allocation for space-time coded OFDM UWB systems
复制标题
空时编码 OFDM UWB 系统的最佳功率分配
DOI：
10.1109/wcnm.2005.1544009
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Jiang Jin
中科院分区：
文献类型：
--
作者：
Junfang Wang;Guangxi Zhu;Jiang Jin
在过去的几年里，超宽带(UWB)系统受到了极大的关注。多天线和/或多载波UWB收发机设计已经被很好地记录下来。与物理层的巨大进步相比，相应的媒体接入控制(MAC)层协议设计自然被提上日程。本文重点研究了UWB空时编码(STC)传输中的最优功率分配方案，这是MAC层协议设计中不可或缺的一部分。为了最大化系统的容量，在频率选择性UWB信道中，提出了两种基于完全CSI和部分CSI的功率分配方案。我们的方案可以很容易地扩展到多频段系统。分析和数值结果表明，该方法具有良好的性能。
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.