Joint sensing and transmission for cognitive amplify-and-forward two-way relay networks

被引:0
|
作者
Ma, Zhen [1 ]
Wang, Gongpu [1 ]
Zou, Yulong [2 ]
Ai, Bo [3 ]
机构
[1] Beijing Jiaotong Univ, Beijing Key Lab Transportat Data Anal & Min, Beijing 100044, Peoples R China
[2] Nanjing Univ Posts & Telecommun, Sch Telecommun & Informat Engn, Nanjing 210003, Jiangsu, Peoples R China
[3] Beijing Jiaotong Univ, State Key Lab Rail Traff Control & Safety, Beijing 100044, Peoples R China
来源
基金
中国国家自然科学基金;
关键词
cognitive radio; two-way relay network; spectrum sensing; outage probability; spectrum hole utilization efficiency; COOPERATIVE DIVERSITY; ENERGY DETECTION; OUTAGE ANALYSIS; RADIO; DESIGN;
D O I
10.1002/wcm.2726
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 paper, we propose a cognitive transmission scheme for Amplify-and-Forward (AF) two-way relay networks (TWRNs) and investigate its joint sensing and transmission performance. Specifically, we derive the overall false alarm probability, the overall detection probability, the outage probability of the cognitive TWRN over Rayleigh fading channels. Furthermore, based on these probabilities, the spectrum hole utilization efficiency of the cognitive TWRN is defined and evaluated. It is shown that smaller individual or overall false alarm probability can result in less outage probability and thus larger spectrum hole utilization efficiency for cognitive TWRN, and however produce more interference to the primary users. Interestingly, it is found that given data rate, more transmission power for the cognitive TWRN does not necessarily obtain higher spectrum hole utilization efficiency. Moreover, our results show that a maximum spectrum hole utilization efficiency can be achieved through an optimal allocation of the time slots between the spectrum sensing and data transmission phases. Finally, simulation results are provided to corroborate our proposed studies. Copyright (C) 2016 John Wiley & Sons, Ltd.
引用
收藏
页码:2809 / 2823
页数:15
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