A Signal Detection Method for Harmonic Signal Submerged in Complex Noise Background

Ai Juan Quan; Xiao Dong Sun; Lan Xiang Zhu

doi:10.4028/www.scientific.net/AMM.397-400.2262

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 397-400A Signal Detection Method for Harmonic Signal...

A Signal Detection Method for Harmonic Signal Submerged in Complex Noise Background

Abstract:

This paper presents a method to detect weak harmonic signal embedded in chaotic noise. Using different correlation characteristic of harmonic and chaotic signal ,we can transform the sample signal to a new data sequence which has new harmonic . The new harmonic frequency is m times of the original harmonic and beyond the center bandwidth of noise. Then use wavelet packet decomposition to analysis the energy distribution of harmonic and chaotic signals and extract the component which the harmonic energy concentrated on, In the end, a multiple signal classification (MUSIC) algorithm is employed to estimate harmonic frequencies . The method suit for the complex background noise (strong chaotic noise and gaussian noise).

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Periodical:

Applied Mechanics and Materials (Volumes 397-400)

Pages:

2262-2265

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.397-400.2262

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Online since:

September 2013

Authors:

Ai Juan Quan, Xiao Dong Sun, Lan Xiang Zhu

Keywords:

Chaotic Signal, Frequency Estimation, Harmonic Signal, Music, Wavelet Packet

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