Power Allocation and Relay Selection for Cognitive Relay Networks with Primary QoS Constraint

被引：22
|
作者：
Lan, Peng [1 ]
Sun, Fenggang [1 ]
Chen, Lizhen [1 ]
Xue, Peng [2 ]
Hou, Jialin [3 ]
机构：
[1] Shandong Agr Univ, Sch Informat Sci & Engn, Tai An, Shandong, Peoples R China
[2] Samsung Elect, SAIT, Suwon, South Korea
[3] Shandong Agr Univ, Coll Mech & Elect Engn, Tai An, Shandong, Peoples R China
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2013年 / 2卷 / 06期
关键词：
Cognitive radio; relay selection; power allocation; quality of service; decode and forward;
D O I：
10.1109/WCL.2013.080813.130469
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this letter, an optimal power allocation scheme between the secondary transmitter (ST) and secondary relay (SR) with best relay selection is proposed for a two-hop decode and forward cognitive relay network. Based on the joint consideration of the interference from ST and SR to the primary user (PU), the closed-form solution for optimal power allocation and relay selection (PARS) is presented under the quality of service (QoS) constraint of the PU transmission. Furthermore, a low complexity sub-optimal scheme is proposed. Simulation results verify the performance improvement of the proposed schemes.
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页码：583 / 586
页数：4
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