Mitigating the Time-Varying Doppler Shift in High-Mobility Wireless Communications Using Multi-Angle Centered Discrete Fractional Fourier Transform

2021 ◽  
Author(s):  
Amir Raeisi Nafchi ◽  
Mona Esmaeili ◽  
Alireza Ghasempour ◽  
Eric Hamke ◽  
Balu Santhanam ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Wireless Communications ◽  
Doppler Shift ◽  
Fractional Fourier Transform ◽  
High Mobility ◽  
Time Varying ◽  
Discrete Fractional Fourier Transform

scholarly journals DFRFT: A Classified Review of Recent Methods with Its Application

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Ashutosh Kumar Singh ◽  
Rajiv Saxena
Keyword(s):  
Fourier Transform ◽  
Computational Complexity ◽  
Doppler Shift ◽  
Fractional Fourier Transform ◽  
Computational Error ◽  
View Point ◽  
Discrete Fractional Fourier Transform ◽  
Correlation Theorem

In the literature, there are various algorithms available for computing the discrete fractional Fourier transform (DFRFT). In this paper, all the existing methods are reviewed, classified into four categories, and subsequently compared to find out the best alternative from the view point of minimal computational error, computational complexity, transform features, and additional features like security. Subsequently, the correlation theorem of FRFT has been utilized to remove significantly the Doppler shift caused due to motion of receiver in the DSB-SC AM signal. Finally, the role of DFRFT has been investigated in the area of steganography.

Sliding 2D Discrete Fractional Fourier Transform

2019 ◽  
Vol 26 (12) ◽  
pp. 1733-1737 ◽  
Author(s):  
Yu Liu ◽  
Hongxia Miao ◽  
Feng Zhang ◽  
Ran Tao
Keyword(s):  
Fourier Transform ◽  
Fractional Fourier Transform ◽  
Discrete Fractional Fourier Transform
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