Universiti Teknologi Malaysia Institutional Repository

Adaptive optimal kernel smooth-windowed wigner-ville bispectrum for digital communication signals

Tan, J. L. and Sha'ameri, Ahmad Zuri (2011) Adaptive optimal kernel smooth-windowed wigner-ville bispectrum for digital communication signals. Signal Processing, 91 (4). pp. 931-937. ISSN 0165-1684

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Official URL: http://dx.doi.org/10.1016/j.sigpro.2010.09.012

Abstract

Higher-order timefrequency distribution (HO-TFD) outperforms the bilinear TFD in noisy conditions but suffers more severely from cross-terms when used to analyze multi-component signals. Various kernel functions have been introduced to suppress cross-terms in bilinear TFD but in general TFD with a fixed kernel do not give accurate TFR for all type of signals. In this paper, adaptive optimal TFR is obtained by extending the separable kernel design in bilinear TFD to the third-order TFD and is able to achieve accurate timefrequency representation at SNR as low as -2 dB. This globally adaptive optimal kernel smooth-windowed Wigner-Ville bispectrum (AOK-SWWVB) is designed where its separable kernel is determined automatically from the input signal, without prior knowledge of the signal parameters. It is shown that this system performance is comparable to the system when priori knowledge of the signal is known.

Item Type:Article
Uncontrolled Keywords:adaptive optimal kernel, digital communication signals, higher-order timefrequency distribution, timefrequency analysis, wigner-ville bispectrum
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:28658
Deposited By: Liza Porijo
Deposited On:12 Nov 2012 07:31
Last Modified:12 Nov 2012 07:31

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