Cooperative AF Relaying With Beamforming and Limited Feedback in Cognitive Radio Networks

被引：13
|
作者：
Afana, Ali [1 ]
Ngatched, Telex M. N. [1 ]
Dobre, Octavia A. [1 ]
机构：
[1] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X5, Canada
来源：
IEEE COMMUNICATIONS LETTERS | 2015年 / 19卷 / 03期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Beamforming; cognitive radio; cooperative relaying; limited feedback; CHANNEL STATE INFORMATION; PERFORMANCE; SYSTEMS;
D O I：
10.1109/LCOMM.2015.2393865
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
This letter studies cooperative beamforming for dual-hop amplify and forward cognitive relay networks comprising a pair of secondary source-destination and multiple antenna relay in the presence of a pair of primary transmitter-receiver. The aim of this work is to improve the secondary system performance with limited feedback from the primary receiver while using a mean value-based power allocation strategy. We derive closed-form expressions for the outage probability and average error probability over Rayleigh fading channels. Numerical and simulation results demonstrate the impact of the limited feedback on the secondary system performance and show that an acceptable performance is achieved when compared with the case of perfect channel state information.
引用
收藏
页码：491 / 494
页数：4
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