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Social Image Security with Encryption and Watermarking in Hybrid Domains. [PDF]

Entropy (Basel)
Ye C, Tan S, Wang J, Shi L, Zuo Q, Feng W, Feng W.   +6 more
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FRFT Based Transmultiplexers

2007 Third International IEEE Conference on Signal-Image Technologies and Internet-Based System, 2007
Transmultiplexers, the basis of which is filter banks, have been successfully utilized for multiuser communications. One important limitation however, is the leakage of signal from one channel to another known as crosstalk. This occurs because the core elements, synthesis and analysis filters employed are nonideal.
George Kwamina Aggrey, Ran Tao
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LFM Interference Suppression Algorithm Based on FrFT

2020 IEEE 6th International Conference on Computer and Communications (ICCC), 2020
Differential frequency hopping (DFH) communication system is widely used in the field of confidential communication with strong anti-jamming ability. Linear frequency modulation (LFM) signal with a broadband non-stationary characteristic can cause a great influence on the DFH communication system.
Zhe Li, Yusheng Yang
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Improved SAR imaging algorithm using FRFT

2016 CIE International Conference on Radar (RADAR), 2016
Improved Azimuth Compression with fractional fourier transform (FRFT) has been studied. Compared to using classic matched filtering technique, the image focused by FRFT has better resolutions. It has been founded that under the condition that chirp's bandwidth keeps the same, the longer pulse duration, the higher resolution of the signal after FRFT ...
Qianrong Lu, Kaizhi Wang, Xingzhao Liu
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Performance improvement of OFDM with DWT-FrFT

2016 International Conference on Signal Processing, Communication, Power and Embedded System (SCOPES), 2016
To enhance the band width usage without cyclic prefix and pilot insertion, wavelet based OFDM is employed for performance increment using BER analysis. This also classified on AWGN, RICIAN, RAYLEIGH and NAKAGAMI channels for BER performance based on SNR.
Sameera Dola, Rajasekhar Karumuri
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Filtering with FRFT convolution

AIP Conference Proceedings, 2012
The Fractional Fourier Transform (FRFT) is a generalization of the classical Fourier transform and has many applications in several areas including signal processing, optics and quantum mechanics. This paper presents a low pass filter, designed by using convolution theorem for FRFT.
Rajshree Mishra, Rajiv Saxena, Renu Jain
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Doppler Estimation from Echo Signal Using FRFT

Wireless Personal Communications, 2013
Fractional Fourier transform has been emerged as a very promising tool in the analysis of signal processing and optical communication. In radar communication, the ambiguity function plays an important role in estimating the delay and Doppler shift introduced in received signal.
Ashutosh Kumar Singh, Rajiv Saxena
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Generalized uncertainty relations of Tsallis entropy on FrFT

Signal, Image and Video Processing, 2020
As the generalization of Shannon entropy, the Tsallis entropy plays an important role in signal processing. In this paper, the generalized uncertainty relations with respect to Tsallis entropy associated with FrFT(fractional Fourier transform) are demonstrated for the first time to date.
Xu Guanlei, Xu Xiaogang, Wang Xiaotong
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On Convolution and Product Theorems for FRFT

Wireless Personal Communications, 2011
The fractional Fourier transform (FRFT), which is considered as a generalization of the Fourier transform (FT), has emerged as a very efficient mathematical tool in signal processing for signals which are having time-dependent frequency component. Many properties of this transform are already known, but the generalization of convolution theorem of ...
A. K. Singh, R. Saxena
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