Power allocation in OFDM-based cognitive radio systems

被引：0
|
作者：
Wang, Peng [1 ]
Zhao, Ming [1 ]
Xiao, Limin [1 ]
Zhou, Shidong [1 ]
Wang, Jing [1 ]
机构：
[1] Tsinghua Univ, Natl Lab Informat Sci & Technol, Beijing 100084, Peoples R China
来源：
GLOBECOM 2007: 2007 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-11 | 2007年
关键词：
cognitive radio (CR); power allocation; OFDM; water-filling;
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, we investigate the optimal power allocation strategy that aims at maximizing the capacity in OFDM-based cognitive radio systems. We show that the traditional water-filling algorithm applied in general OFDM systems needs to be modified due to the per subchannel power constraints in such systems. An iterative partitioned water-filling algorithm is proposed and proved to be optimal based on the convex optimization theory.
引用
收藏
页码：4061 / 4065
页数：5
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