IEICE ESS Fundamentals Review
Online ISSN : 1882-0875
ISSN-L : 1882-0875
Search
Advanced search
OR
Browse
Search
Volume 7, Issue 2
Displaying 1-25 of 25 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Cover
Preface
Special Contribution
Advanced Review Papers
  • The Number of Solutions and Solution Curves of Nonlinear Equations and the Role of the Ω-matrices
    Tetsuo NISHI
    2013 Volume 7 Issue 2 Pages 103-115
    Published: October 01, 2013
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.1587/essfr.7.103
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This paper summarizes so far obtained results on the number of solutions of a class of nonlinear equations related to nonlinear circuits. One of the most well-known results on this problem is the Sandberg-Willson theorem, where the nonlinear functions are assumed to be monotone. In this report we discuss the same problem under more practical conditions and show more general results obtained by a series of papers by the author. The results can be described by use of a new notion, "Ω-matrix", which is introduced in Section 2. In the third section we rst describe the Sandberg-Willson theorem and then we discuss our nonlinear equation problem and especially about a "solution curve" corresponding to the equation and describe how the problem on the number of solutions closely relates to the Ω-matrix.
    View full abstract
    Download PDF (7562K)
Review Papers
Proposed by SIS
  • Hardware Implementation of FFT Processors for Wireless Communications
    Shingo YOSHIZAWA, Yoshikazu MIYANAGA
    2013 Volume 7 Issue 2 Pages 116-123
    Published: October 01, 2013
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.1587/essfr.7.116
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Orthogonal frequency division multiplexing (OFDM) is widely adopted in wideband digital wireless communication systems such as digital television broadcast, wireless LAN/MAN, mobile communication, and Ultra-Wideband (UWB). Operation processing of fast Fourier transform (FFT) is mandatory for OFDM modulation/demodulation. FFT processors which can support Giga samples per second (Gsps) in data processing have been developed recently. This paper starts from the explanation of FFT algorithm and describes hardware implementation of pipeline FFT processors.
    View full abstract
    Download PDF (1990K)
Proposed by SSS
  • Safety Technologies on Railway Signalling and Functional Safety
    Yuji HIRAO
    2013 Volume 7 Issue 2 Pages 124-132
    Published: October 01, 2013
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.1587/essfr.7.124
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Railway signalling systems, which guarantee the safety of train operation, have been developed from the lessons learned from accidents. In the case of railways, the stoppage of trains is, in general, the safest when malfunction of relevant systems or any other difficulty happens, and this is a specific feature of railway signalling systems as well as the rationale for their fail-safe technologies. The safety of computerised railway signalling systems was realised by diagnostic functions and safety-fixed outputs on the basis of fail-safe concepts in 1980s. This paper discusses the safety technologies of railway signalling systems and their relation to functional safety, which applies to safety-related computer control systems.
    View full abstract
    Download PDF (1082K)
Proposed by ITS
  • Research and development on mobility sophisticated by IT from the viewpoint of the systems innovation theory
    Takaaki HASEGAWA
    2013 Volume 7 Issue 2 Pages 133-139
    Published: October 01, 2013
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.1587/essfr.7.133
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This article presents research and development matters of mobility sophisticated by information technology (IT) from the viewpoint of the systems innovation theory. Firstly, a definition of intelligent transport systems (ITS), the significance of mobility, an overview of ITS for the past two decades, the three stages of evolution as well as a summary of the systems innovation theory are mentioned. Secondly, based on the above matters, research and development on mobility related fields are discussed. Lastly, the possibility of the micro mobility is argued in anticipation in the super aging society from the viewpoint of the quality of spatial comfort (QoSC).
    View full abstract
    Download PDF (1090K)
Miscellaneous Articles
ESS News
International Conference Report
Let's go to IEICE Workshops!
Winners' Voice
Cambridge Report
Katsushika Report
Committees & Editors Notes
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top