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IEICE Trans

Masataka NAKAMURA

A Realization of Low-Frequency Active RC Second-Order Band-Pass Circuit with Stable High Q
Nobuyuki MASUMI Masataka NAKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/06/01
Vol. E88-C  No. 6  pp. 1172-1179
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
Category: Active Filter
Keyword: 
active RC filter, ultralow/low-frequency signal, analog signal processing, capacitance multiplier, high Q, 
 Summary | Full Text:PDF
Sharp Directivity Function Based on Fourier Series Expansion and Its Directional System Realization with Small Number of Microphones
Masataka NAKAMURA Toshitaka YAMATO Katsuhito KOUNO Atsuyuki TAKASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/04/01
Vol. E84-A  No. 4  pp. 975-983
Type of Manuscript:  Special Section PAPER (Special Section on Acoustic Signal Processing)
Category: 
Keyword: 
beamformer, sharp directional pattern, microphone array, directional microphone, acoustic signal processing, 
 Summary | Full Text:PDF
Realization of Wide-Band Directivity with Three Microphones
Masataka NAKAMURA Katsuhito KOUNO Toshitaka YAMATO Kazuhiro SAKIYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/04/25
Vol. E82-A  No. 4  pp. 619-625
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Signal Processing Techniques for Analysis of Acoustical and Vibrational Signals)
Category: 
Keyword: 
speech recognition, beamformer, microphone array, high SN ratio, analog signal processing, 
 Summary | Full Text:PDF