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Optimization of Threshold for Energy Based Spectrum Sensing Using Differential Evolution
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Wireless Engineering and Technology·Volume 02 (2011)·Pages 130–134·Published 6 July 2011·DOI10.4236/wet.2011.23019
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Abstract
Interference threshold based on energy setting in cognitive radios is a non-convex optimization problem [4]. The convergence of optimization techniques like Genetic algorithm (GA) takes several iterations to fix this threshold. Here, an attempt made to use Differential evolution (DE) method for optimization after formulating the objective functions. The advantages with this method were three fold over GA. They were, a. A reduced number of iterations, b. Marginal improvement and consistency of throughput and c. Localization of the best solution. The comparative results are presented and discussed.
KeywordsCognitive RadioSpectrum SensingDifferential Evolution
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