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Dedicated processor for hologram calculation using sparse Fourier bases
Journal Contribution - Journal Article
Recently, a calculation method involving sparse point spread functions in the short-time Fourier transform (STFT) domain was proposed. In this paper, a dedicated processor using the STFT algorithm is described, which is implemented on a field-programmable gate array. All the operations in this algorithm are implemented using fixed-point arithmetic. Since this algorithm includes a trigonometric function and an error function, lookup tables (LUTs) are utilized to reduce the calculation costs. We have devised a dedicated circuit architecture that allows parallel operations. In addition, a central processing unit could generate holograms using the STFT-based algorithm with fixedpoint arithmetic and LUTs at a higher speed than the generation using floating-point arithmetic.
Journal: Appl. Optics
ISSN: 1559-128X
Issue: 26
Volume: 59
Pages: 8029-8037
Publication year:2020
CSS-citation score:1
Accessibility:Closed