Dedicated processor for hologram calculation using sparse Fourier bases

Daiki Yasuki, David Blinder, Tomoyoshi Shimobaba, Yota Yamamoto, Ikuo Hoshi, Peter Schelkens, Takashi Kakue, Tomoyoshi Ito

Onderzoeksoutput: Article

Samenvatting

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.
Originele taal-2English
Pagina's (van-tot)8029-8037
Aantal pagina's9
TijdschriftApplied Optics
Volume59
Nummer van het tijdschrift26
DOI's
StatusPublished - 10 sep 2020

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