Kenya Yokoi
Ricoh
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Publication
Featured researches published by Kenya Yokoi.
Japanese Journal of Applied Physics | 2007
Ryosuke Kasahara; Tetsuya Ogata; Toshiyuki Kawasaki; Hiroshi Miura; Kenya Yokoi
A decision feedback partial response maximum likelihood (PRML) for super-resolution media was developed. Decision feedback is used to compensate for nonlinear distortion in the readout signals of super-resolution media, making it possible to compensate for long-bit nonlinear distortion in small circuits. An field programmable gate array (FPGA) was fabricated with a decision feedback PRML, and a real-time bit error rate (bER) measuring system was developed. As a result, a bER of 4×10-5 was achieved with an actual readout signal at the double density of a Blu-ray disc converted to the optical properties of the experimental setup using a red-laser system. Also, a bER of 1.5×10-5 was achieved at double the density of an a high definition digital versatile disc read-only memory (HD DVD-ROM), and the radial and tangential tilt margins were measured in a blue-laser system.
Archive | 1996
Kenya Yokoi; Ikuo Aoki
Archive | 2003
Kenya Yokoi
Archive | 1995
Ikuo Aoki; Kenya Yokoi; 研哉 横井; 育夫 青木
Archive | 1999
Kenya Yokoi; Akihiko Shimizu; Hiroshi Koide
Archive | 2003
Kenya Yokoi
Archive | 2002
Michiharu Abe; Michiaki Shinotsuka; Kenya Yokoi
Archive | 1989
Haruo Iimura; Yasuyuki Takiguchi; Akihiko Kanemoto; Kenya Yokoi; Takamichi Enomoto
Archive | 2003
Naruhiro Masui; Kenya Yokoi
Archive | 2007
Kenya Yokoi; Ryosuke Kasahara