Detection of Nonlinear Frequency Modulated Signal Based on Fractional Fourier Transform

Yan Jun Wu; Min Tao; Min Qi Zhou

doi:10.4028/www.scientific.net/AMR.989-994.4042

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 989-994Detection of Nonlinear Frequency Modulated Signal...

Detection of Nonlinear Frequency Modulated Signal Based on Fractional Fourier Transform

Abstract:

Based on fractional Fourier transformation (FRFT), the feature of the signals which vary smoothly from time domain to frequency domain is given. The FRFT method is applied to the estimation and detection of nonlinear frequency modulated signals to which piecewise linearly approach. Wigner-Ville time frequency distribution of the signals is used after approaching and the masking results of the original signal accumulate energy as detecting statistic. A signal detector based on energy accumulation from time frequency domain in the angle of analysis of both time and frequency is proposed. Finally, a comparison with traditional non-coherent energy accumulation methods is made, which shows the proposed method has superior performance.

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Periodical:

Advanced Materials Research (Volumes 989-994)

Pages:

4042-4045

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.989-994.4042

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Online since:

July 2014

Authors:

Yan Jun Wu*, Min Tao, Min Qi Zhou

Keywords:

Fractional Fourier Transform (FrFT), Linearly Approximation Approach, Nonlinear Frequency Modulated Signal, Wigner-Ville Distribution (WVD)

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