Title :
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
fDate :
4/1/2012 12:00:00 AM
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.021612.112143
