Comparative analysis of variants of Gabor-Wigner transform for cross-term reduction

Metrology and Measurement Systems

Nabeel Ali Khan¹  Muhammad Ajab¹  Imtiaz Ahmad Taj¹ 

关键词: Wigner Distribution;    Gabor Transform;    Gabor Wigner Transform;    Fractional Fourier Transform.;   

DOI  :  10.2478/v10178-012-0043-6

来源: Versita

【 摘 要 】

Gabor Wigner Transform (GWT) is a composition of two time-frequency planes (Gabor Transform (GT) and Wigner Distribution (WD)), and hence GWT takes the advantages of both transforms (high resolution of WD and cross-terms free GT). In multi-component signal analysis where GWT fails to extract auto-components, the marriage of signal processing and image processing techniques proved their potential to extract autocomponents. The proposed algorithm maintained the resolution of auto-components. This work also shows that the Fractional Fourier Transform (FRFT) domain is a powerful tool for signal analysis. Performance analysis of modified fractional GWT reveals that it provides a solution of cross-terms of WD and blurring of GT.

【 授权许可】

Unknown