Abstract
The Whittaker–Shannon–Kotel’nikov (WSK) sampling theorem provides a reconstruction formula for the bandlimited signals. In this paper, a novel kind of the WSK sampling theorem is established by using the theory of quaternion reproducing kernel Hilbert spaces. This generalization is employed to obtain the novel sampling formulas for the bandlimited quaternion-valued signals. A special case of our result is to show that the 2D generalized prolate spheroidal wave signals obtained by Slepian can be used to achieve a sampling series of cube-bandlimited signals. The solutions of energy concentration problems in quaternion Fourier transform are also investigated.
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Acknowledgements
The authors acknowledge financial support from the National Natural Science Funds 11401606, University of Macau MYRG2015-00058-L2-FST and the Macao Science and Technology Development Fund (FDCT/099/2012/A3 and FDCT/031/2016/A1).
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Communicated by Eckhard Hitzer
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Cheng, D., Kou, K.I. Novel Sampling Formulas Associated with Quaternionic Prolate Spheroidal Wave functions. Adv. Appl. Clifford Algebras 27, 2961–2983 (2017). https://doi.org/10.1007/s00006-017-0815-x
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DOI: https://doi.org/10.1007/s00006-017-0815-x
Keywords
- Spectral theorem
- Prolate spheroidal wave function
- Quaternion reproducing-kernel Hilbert spaces
- Quaternion Fourier transform
- Whittaker-Shannon-Kotel’nikov sampling formula