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

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4 Author(s)
Shiwei Huang ; Key Lab. of Cognitive Radio & Inf. Process., Guilin Univ. of Electron. Technol., Guilin, China ; Hongbin Chen ; Yan Zhang ; Feng Zhao

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.

Published in:

Communications Letters, IEEE  (Volume:16 ,  Issue: 4 )