New Optimal Power Allocation for Bidirectional Communications in Cognitive Relay Network Using Analog Network Coding

被引：0
|
作者：
Lu Luxi [1 ]
Jiang Wei [1 ]
Xiang Haige [1 ]
Luo Wu [1 ]
机构：
[1] Peking Univ, State Key Lab Adv Opt Commun Syst & Networks, Sch EECS, Beijing 100871, Peoples R China
来源：
CHINA COMMUNICATIONS | 2010年 / 7卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Cognitive Radio; Cooperative Communication; Analog Network Coding; Bidirectional Communications; Interference power constraint; EFFICIENT PROTOCOLS; RADIO;
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：
Cognitive radio and cooperative communication can greatly improve the spectrum efficiency in wireless communications. We study a cognitive radio network where two secondary source terminals exchange their information with the assistance of a relay node under interference power constraints. In order to enhance the transmit rate and maintain fairness between two source terminals, a practical 2-phase analog network coding protocol is adopted and its optimal power allocation algorithm is proposed. Numerical results verify the superiority of the proposed algorithm over the conventional direct transmission protocol and 4-phase amplify-and-forward relay protocol.
引用
收藏
页码：144 / 148
页数：5
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