A General Power Allocation Algorithm for OFDM-Based Cognitive Radio Systems

被引：0
|
作者：
Wang, Peng [1 ]
Zhong, Xiaofeng [1 ]
Xiao, Limin [1 ]
Zhou, Shidong [1 ]
Wang, Jing [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Tsinghua Natl Lab Informat Sci & Technol, State Key Lab Microwave & Digital Commun, Beijing 100084, Peoples R China
来源：
2009 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION WORKSHOPS, VOLS 1 AND 2 | 2009年
关键词：
Cognitive radio (CR); OFDM; power allocation;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In OFDM-based cognitive radio systems, the interference power limits of the primary users (PUs) introduce subchannel transmit power constraints for the secondary user (SU). The power allocation among the subcarriers of SU should be subject to both the sum transmit power constraint as well as the transmit power constraint of each subchannel. Different from previous works, we deal with a more general case where the subcarrier sidelobes are specially considered. A general power allocation algorithm is proposed to obtain the optimal solution that maximizes the capacity while satisfying both the sum and subchannel transmit power constraints.
引用
收藏
页码：322 / 326
页数：5
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