Recent Patents on Engineering

Togay Ozbakkaloglu  
School of Civil, Environmental and Mining Engineering
The University of Adelaide
Adelaide, SA
Australia

 

Back

Recent Developments in FRFT, DFRFT with their Applications in Signal and Image Processing

Author(s): Ashutosh Kumar Singh, Rajiv Saxena.

Abstract:

As a tool for analyzing one- and two- dimensional signals in time-frequency plane, fractional Fourier transform (FRFT) has got sound acclamation in the recent past. In this article, the developments of FRFT are presented based on the recent patents and publications. The escalation of mathematical properties of FRFT is discussed extensively. Especially, convolution, correlation, sampling and uncertainty theorems for the FRFT are included. Subsequently, due to existence of many algorithms for evaluating the discrete FRFT, a comparative analysis is made to establish the best one amongst available. Lastly, the application of FRFT (by way of implementing the identified DFRFT) in filtering, beam-forming, encryption and watermarking is highlighted.

Keywords: Beam-forming, DFRFT, encryption, filtering, FRFT, image processing, LCT, signal processing, time-frequency plane, watermarking, fractional Fourier transform, Gaussian signal, Cross-Correlation Theorem, Fresnel integral, Lagrange interpolation polynomial

Order Reprints Order Eprints Rights & PermissionsPrintExport

Article Details

VOLUME: 5
ISSUE: 2
Year: 2011
Page: [113 - 138]
Pages: 26
DOI: 10.2174/187221211796320729
Price: $100