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Your search keyword '"Naoyuki Aikawa"' showing total 11 results
Start Over Author "Naoyuki Aikawa" Journal ieej transactions on electronics, information and systems
11 results on '"Naoyuki Aikawa"'

6. An Automatic Analysis of Sleep Stage 2 based on the Fujimori Method

Author

Takashi Yoshida, Naoyuki Aikawa, Yuka Kawashima, and Mitsuo Hayashi

Subjects
medicine.medical_specialty, Computer Networks and Communications, Computer science, General Physics and Astronomy, Sleep spindle, 02 engineering and technology, Electroencephalography, Audiology, 01 natural sciences, 050105 experimental psychology, 03 medical and health sciences, 0302 clinical medicine, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, medicine, 0501 psychology and cognitive sciences, Electrical and Electronic Engineering, 010302 applied physics, medicine.diagnostic_test, business.industry, Applied Mathematics, 05 social sciences, 020208 electrical & electronic engineering, Sleep in non-human animals, Signal Processing, Stage (hydrology), business, 030217 neurology & neurosurgery
Published
2018
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9. Transfer Function of the Reduced-Delay Low-Pass Maximally Flat FIR Digital Differentiators

Author

Naoyuki Aikawa and Takashi Yoshida

Subjects
Control theory, Low-pass filter, Digital differentiator, 0202 electrical engineering, electronic engineering, information engineering, 020206 networking & telecommunications, 020201 artificial intelligence & image processing, 02 engineering and technology, Electrical and Electronic Engineering, Transfer function, Mathematics
Published
2016
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11. An L1-Approximation for the Design of FIR Digital Filters with Complex Coefficients

Author

Ikuya Murakami, Naoyuki Aikawa, and Yukio Mori

Subjects
Filter (signal processing), symbols.namesake, Discontinuity (linguistics), Control theory, Overshoot (signal), symbols, Point (geometry), Electrical and Electronic Engineering, Newton's method, Digital filter, Passband, Algorithm, Group delay and phase delay, Mathematics
Abstract

SUMMARY In this paper, we propose an L1-approximation for the design of FIR digital filters with complex coefficients. The L1-approximation has the advantage of having a flatter passband and a small overshoot around the discontinuity point as compared with the L2-approximation and -approximation. As the obtained filter has complex coefficients, it is possible to reduce group delay and to design a digital filter with a asymmetric amplitude characteristic with respect to the origin. The algorithm proposed in this paper is based on Newton's method, which is an efficient iterative approximation algorithm. We show the effectiveness of the proposed method through a design example.

Published
2014
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