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

被引：23

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.

引用

页码：583 / 586

页数：4

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