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Structure of High-Speed Modulo Multiplier Oriented to Repeated Operation
Tadamichi Kudou,Yoshitaka Tsunekawa 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
A high-speed modulo multiplier using redundant representations is presented. It is oriented to repeated operations such as public key cryptosystems which preform repeated modulo multiplications. First, to implement a high-speed modulo multiplier, we show two approaches for radix-2 operations to perform each operations simultaneously. Second, these approaches are applied to radix-4 operations to reduce clock cycles. As a result, the speed of the proposed structure becomes over twice faster than the conventional structures.
A Safe and Reliable Method for Installing Wireless LAN into a Hospital
Eisuke Hanada,Takato Kudou 한국전자파학회JEES 2011 Journal of Electromagnetic Engineering and Science Vol.11 No.4
A medical environment in which patient information can be accessed anytime / anywhere is called a “ubiquitous environment”. To realize such an environment, the installation of wireless LAN is quite effective. Because the maximum radio wave output (antenna power) is set low in Japan, it has been easy to safely introduce wireless LAN into hospitals, to date mainly into large hospitals. However, if the placement of access points is not done properly, problems will occur, such as signals not reaching the desired area. A solution to these types of problems is to do an electromagnetic-field propagation simulation, which should be performed before construction of the hospital. It is also necessary to protect against security problems, such as signal interception or illegal access. We herein show our procedures for the safe introduction of wireless LAN.
Characteristics of Maximal-Period Sequences Generated by Feedback-Switching NFSRs
Raphael Eboku,Akio Tsuneda,Kunihiko Kudou,Takahiro Inoue 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
We propose a method to generate sequences using feedback-limited nonlinear feedback shift registers (NFSRs) with switching the inputs to a fixed feedback circuit. Some characteristics of the pseudorandom sequences generated by the proposed method are investigated by numerical experiments.