Energy-Efficient Cooperative Spectrum Sensing with Amplify-and-Forward Relaying

Author

Huang, Shiwei ; Chen, Hongbin ; Zhang, Yan ; Zhao, Feng

Author_Institution

Key Lab. of Cognitive Radio & Inf. Process., Guilin Univ. of Electron. Technol., Guilin, China

Volume

16

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

450

Lastpage

453

Abstract

An energy-efficient cooperative spectrum sensing scheme with amplify-and-forward relaying is proposed in this letter. The goal is to minimize the total energy consumption while satisfying the sensing performance constraint. Toward this goal, a constrained optimization problem is formulated in terms of three sensing parameters (number of relays, relay amplifying gains, and number of samples). An approximate closed-form solution to the optimization problem is derived and is validated by simulations.

Keywords

amplify and forward communication; cooperative communication; energy consumption; optimisation; radio spectrum management; amplify-and-forward relaying; approximate closed-form solution; constrained optimization problem; energy consumption; energy-efficient cooperative spectrum sensing; sensing parameters; sensing performance constraint; Cognitive radio; Energy consumption; Optimization; Relays; Sensors; Wireless sensor networks; Cognitive radio; amplify-and-forward relaying; cooperative spectrum sensing; energy efficiency; optimization;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.021612.112143

Filename

6155569