Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2014 Vol: 6 Issue: 6

Filtering method in wireless sensor network management based on EMD algorithm and multi scale wavelet analysis

Abstract

Time frequency analysis method based on EMD is an adaptive frequency analysis method, the data need a total of two basic steps: firstly, it decomposes the signal into several basic function component, then the time-frequency analysis using Hilbert transform. Wavelet transform is a time-frequency localization methods, time-frequency window area fixed but may change shape, which has higher frequency resolution in the low frequency part and the low time resolution, high time resolution in the high frequency part. Multi scale analysis and discrete wavelet transform is the core content of the wavelet analysis. The paper proposes the Filtering method in wireless sensor network management based on EMD algorithm and Multi scale wavelet analysis. The simulation experiments show that the method is effective to tradition WSN management.

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