Journal of Applied Mathematics

The Wigner-Ville Distribution Based on the Linear Canonical Transform and Its Applications for QFM Signal Parameters Estimation

Yu-E Song, Xiao-Yan Zhang, Chun-Heng Shang, Hong-Xia Bu, and Xiao-Yan Wang

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Abstract

The Wigner-Ville distribution (WVD) based on the linear canonical transform (LCT) (WDL) not only has the advantages of the LCT but also has the good properties of WVD. In this paper, some new and important properties of the WDL are derived, and the relationships between WDL and some other time-frequency distributions are discussed, such as the ambiguity function based on LCT (LCTAF), the short-time Fourier transform (STFT), and the wavelet transform (WT). The WDLs of some signals are also deduced. A novel definition of the WVD based on the LCT and generalized instantaneous autocorrelation function (GWDL) is proposed and its applications in the estimation of parameters for QFM signals are also discussed. The GWDL of the QFM signal generates an impulse and the third-order phase coefficient of QFM signal can be estimated in accordance with the position information of such impulse. The proposed algorithm is fast because it only requires 1-dimensional maximization. Also the new algorithm only has fourth-order nonlinearity thus it has accurate estimation and low signal-to-noise ratio (SNR) threshold. The simulation results are provided to support the theoretical results.

Article information

Source
J. Appl. Math., Volume 2014 (2014), Article ID 516457, 8 pages.

Dates
First available in Project Euclid: 2 March 2015

Permanent link to this document
https://projecteuclid.org/euclid.jam/1425305760

Digital Object Identifier
doi:10.1155/2014/516457

Mathematical Reviews number (MathSciNet)
MR3212503

Citation

Song, Yu-E; Zhang, Xiao-Yan; Shang, Chun-Heng; Bu, Hong-Xia; Wang, Xiao-Yan. The Wigner-Ville Distribution Based on the Linear Canonical Transform and Its Applications for QFM Signal Parameters Estimation. J. Appl. Math. 2014 (2014), Article ID 516457, 8 pages. doi:10.1155/2014/516457. https://projecteuclid.org/euclid.jam/1425305760


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