Relay Selections for Cooperative Underlay CR Systems With Energy Harvesting

被引：24

作者：

Ye, Jia ^{[1
,2
]}

Liu, Zhedong ^{[2
]}

Zhao, Hui ^{[2
]}

Pan, Gaofeng ^{[1
]}

Ni, Qiang ^{[3
]}

Alouini, Mohamed-Slim ^{[2
]}

机构：

[1] Southwest Univ, Chongqing Key Lab Nonlinear Circuits & Intelligen, Chongqing 400715, Peoples R China

[2] King Abdullah Univ Sci & Technol, Comp Elect & Math Sci & Engn Div, Thuwal 23955, Saudi Arabia

[3] Univ Lancaster, Sch Comp & Commun, Lancaster LA1 4WA, England

来源：

IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING | 2019年 / 5卷 / 02期

关键词：

Outage probability; relay selection; threshold decode-and-forward relay scheme; underlay cognitive radio etworks; wireless energy harvesting; COGNITIVE RADIO NETWORKS; DECODE-AND-FORWARD; PERFORMANCE ANALYSIS; CELLULAR NETWORKS; POWER ALLOCATION;

D O I：

10.1109/TCCN.2019.2908900

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In this paper, we consider a cooperative underlay cognitive radio system in which one secondary user (S) transmits its data to a secondary receiver with the assistance of multiple relays. In the considered underlay spectrum sharing scenario, the transmit power levers at S and forwarding relays are adjusted simultaneously according to a given threshold interference power that the primary user can tolerate. We also consider that relays adopt threshold decode-and-forward relay scheme and harvest energy from the primary transmitter with finite energy storage capacity under time switching scheme. Three best relay selection (RS) schemes, optimal source-relay link with wireless energy harvesting (WEH), optimal relay-destination link with WEH and optimal source-relay-destination link with WEH schemes, are proposed and studied. Closed-form analytical expressions for the outage probability of these three best RS schemes are derived, respectively. Finally, our analytical results are verified by Monte-Carlo simulations.

引用

页码：358 / 369

页数：12

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