Performance Analysis of a Built-In Planar Inverted F Antenna for 800 MHz Band Portable Radio Units. - Tokio Taga; Koichi Tsunekawa (IEEE J. Sel. Areas Commun., 1987)

Advanced LOS path-loss model in microcellular mobile communications. - Yasuhiro Oda; Koichi Tsunekawa; Masaharu Hata (IEEE Trans. Veh. Technol., 2000)

Multipath propagation model of spatio-temporal dispersion observed at base station in urban areas. - Shinichi Ichitsubo; Koichi Tsunekawa; Yoshio Ebine (IEEE J. Sel. Areas Commun., 2002)

Novel MIMO-SDMA configuration adopting directivity and polarization control. - Kentaro Nishimori; Yasushi Takatori; Riichi Kudo; Nobuhiko Tachikawa; Koichi Tsunekawa (PIMRC, 2004)

Series-Fed Beam-Scanning Antenna Employing Multi-Stage Configured Microstrip Antennas with Tunable Reactance Devices. - Naoki Honma; Tomohiro Seki; Kenjiro Nishikawa; Koichi Tsunekawa; Kunio Sawaya (IEICE Trans. Commun., 2005)

Frequency Correlation Characteristics Due to Antenna Configurations in Broadband MIMO Transmission. - Kentaro Nishimori; Nobuhiko Tachikawa; Yasushi Takatori; Riichi Kudo; Koichi Tsunekawa (IEICE Trans. Commun., 2005)

Channel Capacity of TDD-OFDM-MIMO for Multiple Access Points in a Wireless Single-Frequency-Network. - Yasushi Takatori; Frank H. P. Fitzek; Koichi Tsunekawa; Ramjee Prasad (Wirel. Pers. Commun., 2005)

Performance Evaluation of 8×8 Multi-User MIMO-OFDM Testbed in an Actual Indoor Environment. - Kentaro Nishimori; Riichi Kudo; Yasushi Takatori; Atsushi Ohta; Koichi Tsunekawa (PIMRC, 2006)

Experimental Evaluation of Eigenvector Beamforming Method with 8X4 MIMO-OFDM Testbed. - Riichi Kudo; Kentaro Nishimori; Yasushi Takatori; Koichi Tsunekawa (VTC Spring, 2006)

Novel Downlink Beamforming Method Using Selective STBC with Common Eigenvectors for MIMO-OFDM Systems. - Riichi Kudo; Yasushi Takatori; Kentaro Nishimori; Koichi Tsunekawa (IEICE Trans. Commun., 2006)

Analysis and Performance Improvement of Independent Electric Coupled Resonance WPT System with Impedance Transformer. - Cheng Yang; Koichi Tsunekawa (IEICE Trans. Commun., 2015)

A Novel Resonator Design for Q Factor Improvement Using Tightly-Coupled Parallel Coils in Coupled Magnetic Resonance Wireless Power Transfer. - Cheng Yang; Koichi Tsunekawa (IEICE Trans. Commun., 2016)