A New Sampling Frequency Selection Scheme in Undersampling Systems. - Yoshio Kunisawa; Naohiro Sahara; Hiroshi Shirai; Hisato Iwai (IEICE Trans. Commun., 2005)

Reconstruction of Polygonal Cylindrical Targets with Curved Surfaces from Their Monostatic RCS. - Hiroshi Shirai; Yoshinori Hiramatsu; Masashi Suzuki (IEICE Trans. Electron., 2005)

Cyclic Shifted-and-Extended Codes Based on a Quasi-Orthogonal Sequence for a CDM Transmission Scheme. - Kazuyuki Shimezawa; Hiroshi Harada; Hiroshi Shirai (IEICE Trans. Commun., 2006)

Empirical Investigation of the LOS Propagation Characteristics on an Undulating Road for Millimeter Wave Inter-Vehicle Communication. - Atsushi Yamamoto; Koichi Ogawa; Hiroshi Shirai (IEICE Trans. Electron., 2007)

Efficient Ray-Launching Method For 2D Indoor Propagation Analysis. - Ryoichi Sato; Hiroshi Shirai (IEICE Trans. Electron., 2009)

Modification of Ray-Launching Method for Accurate 2D Indoor Propagation Analysis. - Ryoichi Sato; Hiroshi Shirai (IEICE Trans. Electron., 2011)

Effect of input-signal statistical property in delta-sigma modulator with non-uniform quantization. - Toru Kitayabu; Hiroyasu Ishikawa; Mao Hagiwara; Hiroshi Shirai (RWS, 2012)

Novel usage of binary tree in SBR algorithm for efficient indoor propagation analysis. - Ryoichi Sato; Hiroshi Sato; Hiroshi Shirai (IEICE Electron. Express, 2012)

A Delta-Sigma Modulator Using a Non-uniform Quantizer Adjusted for the Probability Density of Input Signals. - Toru Kitayabu; Mao Hagiwara; Hiroyasu Ishikawa; Hiroshi Shirai (IEICE Trans. Commun., 2012)

High Frequency Ray-Mode Coupling Analysis of Plane Wave Diffraction by a Wide and Thick Slit on a Conducting Screen. - Hiroshi Shirai; Ryoichi Sato (IEICE Trans. Electron., 2012)

Foreword. - Masahiko Nishimoto; Hiroshi Shirai (IEICE Trans. Electron., 2013)

Theoretical Limitation of the Radiation Efficiency for Homogenous Electrically Small Antennas. - Keisuke Fujita; Hiroshi Shirai (IEICE Trans. Electron., 2015)

Foreword. - Hiroshi Shirai; Motoyuki Sato (IEICE Trans. Electron., 2015)

New Estimation Method for the Operational Low Frequency End of Antipodal Vivaldi Antennas. - Hien Ba Chu; Hiroshi Shirai; Chien Dao Ngoc (IEICE Trans. Electron., 2016)

Electromagnetic Scattering Analysis from Rectangular Dielectric Cuboids - TE Polarization -. - An Ngoc Nguyen; Hiroshi Shirai (IEICE Trans. Electron., 2016)

Electromagnetic Plane Wave Diffraction by Loaded N-Slits on Thick Conducting Screen. - Ryoichi Sato; Hiroshi Shirai (IEICE Trans. Electron., 2016)

Theoretical Limit of the Radiation Efficiency for Electrically Small Self-Resonant Spherical Surface Antennas. - Keisuke Fujita; Hiroshi Shirai (IEICE Trans. Electron., 2017)

A Free Space Permittivity Measurement at Microwave Frequencies for Solid Materials. - An Ngoc Nguyen; Hiroshi Shirai (IEICE Trans. Electron., 2017)

A New Interpretation of Physical Optics Approximation from Surface Equivalence Theorem. - Hieu Ngoc Quang; Hiroshi Shirai (IEICE Trans. Electron., 2018)

Kirchhoff Approximation Analysis of Plane Wave Scattering by Conducting Thick Slits. - Khanh Nam Nguyen; Hiroshi Shirai (IEICE Trans. Electron., 2019)

High Frequency Electromagnetic Scattering Analysis by Rectangular Cylinders - TM Polarization -. - Hieu Ngoc Quang; Hiroshi Shirai (IEICE Trans. Electron., 2019)

A Field Equivalence between Physical Optics and GO-Based Equivalent Current Methods for Scattering from Circular Conducting Cylinders. - Ngoc Quang Ta; Hiroshi Shirai (IEICE Trans. Electron., 2020)

Electromagnetic Scattering Analysis from a Rectangular Hole in a Thick Conducting Screen. - Khanh Nam Nguyen; Hiroshi Shirai; Hirohide Serizawa (IEICE Trans. Electron., 2021)

A Discussion on Physical Optics Approximation for Edge Diffraction by A Conducting Wedge. - Duc Minh Nguyen; Hiroshi Shirai (IEICE Trans. Electron., 2022)

On the Asymptotic Evaluation of the Physical Optics Approximation for Plane Wave Scattering by Circular Conducting Cylinders. - Ngoc Quang Ta; Hiroshi Shirai (IEICE Trans. Electron., 2022)

An Extension of Physical Optics Approximation for Dielectric Wedge Diffraction for a TM-Polarized Plane Wave. - Duc Minh Nguyen; Hiroshi Shirai; Se-Yun Kim (IEICE Trans. Electron., 2024)

High Frequency Plane Wave Scattering Analysis by Large Buildings with Multiple Windows. - Cuong Manh Bui; Hiroshi Shirai (IEICE Trans. Electron., 2025)