Fourier–Bessel series
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In mathematics, Fourier–Bessel series is a particular kind of generalized Fourier series (an infinite series expansion on a finite interval) based on Bessel functions.
Fourier–Bessel series are used in the solution to partial differential equations, particularly in cylindrical coordinate systems. The series formed by the Bessel function of the first kind is known as the Schlömilch's series.
Definition[]
The Fourier–Bessel series of a function f(x) with a domain of [0, b] satisfying f(b) = 0
Interpretation[]
The Fourier–Bessel series may be thought of as a Fourier expansion in the ρ coordinate of cylindrical coordinates. Just as the Fourier series is defined for a finite interval and has a counterpart, the continuous Fourier transform over an infinite interval, so the Fourier–Bessel series has a counterpart over an infinite interval, namely the Hankel transform.
Calculating the coefficients[]
As said, differently scaled Bessel Functions are orthogonal with respect to the inner product
according to
(where: is the Kronecker delta). The coefficients can be obtained from projecting the function f(x) onto the respective Bessel functions:
where the plus or minus sign is equally valid.
Application[]
The Fourier–Bessel series expansion employs aperiodic and decaying Bessel functions as the basis. The Fourier–Bessel series expansion has been successfully applied in diversified areas such as Gear fault diagnosis, discrimination of odorants in a turbulent ambient, postural stability analysis, detection of voice onset time, glottal closure instants (epoch) detection, separation of speech formants, EEG signal segmentation, speech enhancement, and speaker identification. The Fourier–Bessel series expansion has also been used to reduce cross terms in the Wigner–Ville distribution.
Dini series[]
A second Fourier–Bessel series, also known as Dini series, is associated with the Robin boundary condition
where is the n-th zero of .
The coefficients are given by
See also[]
References[]
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- R.K. Tripathy, A. Bhattacharyya, and R.B. Pachori, A novel approach for detection of myocardial infarction from ECG signals of multiple electrodes, IEEE Sensors Journal, DOI: 10.1109/JSEN.2019.2896308, 2019.
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- A. Anuragi, D. Sisodia, and RB Pachori, Automated alcoholism detection using Fourier-Bessel series expansion based empirical wavelet transform, IEEE Sensors Journal, DOI: 10.1109/JSEN.2020.2966766, 2020.
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- V. Gupta and R.B. Pachori, Classification of focal EEG signals using FBSE based flexible time-frequency coverage wavelet transform, Biomedical Signal Processing and Control, DOI: https://doi.org/10.1016/j.bspc.2020.102124.
- A. Bhattacharyya, R.K. Tripathy, L. Garg, and R.B. Pachori, A novel multivariate-multiscale approach for computing EEG spectral and temporal complexity for human emotion recognition, IEEE Sensors Journal, DOI: 10.1109/JSEN.2020.3027181.
- P.K. Chaudhary and R.B. Pachori, Automatic diagnosis of glaucoma using two-dimensional Fourier-Bessel series expansion based empirical wavelet transform, Biomedical Signal Processing and Control, DOI: https://doi.org/10.1016/j.bspc.2020.102237.
- V. Gupta and R.B. Pachori, FBDM based time-frequency representation for sleep stages classification using EEG signals, Biomedical Signal Processing and Control, DOI: https://doi.org/10.1016/j.bspc.2020.102265.
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- P.K. Chaudhary and R.B. Pachori, FBSED based automatic diagnosis of COVID-19 using X-ray and CT images, Computers in Biology and Medicine, DOI: https://doi.org/10.1016/j.compbiomed.2021.104454.
- A. Anuragi, D.S. Sisodia, and R.B. Pachori, Automated FBSE-EWT based learning framework for detection of epileptic seizures using time-segmented EEG signals, Computers in Biology and Medicine, DOI: https://doi.org/10.1016/j.compbiomed.2021.104708.
- A. Anuragi, D.S. Sisodia, and R.B. Pachori, Epileptic-seizure classification using phase-space representation of FBSE-EWT based EEG sub-band signals and ensemble learners, Biomedical Signal Processing and Control, DOI: https://doi.org/10.1016/j.bspc.2021.103138.
External links[]
- "Fourier-Bessel series", Encyclopedia of Mathematics, EMS Press, 2001 [1994]
- Weisstein, Eric. W. "Fourier-Bessel Series". From MathWorld--A Wolfram Web Resource.
- Fourier–Bessel series applied to Acoustic Field analysis on Trinnov Audio's research page
- Fourier series