Telecommunications aspects of intelligent buildings. - Takao Kashiwamura; Hisao Koga; Yasuji Murakami (IEEE Commun. Mag., 1991)

On the Effect of Time-Domain Per-Subcarrier Equalization for Band-Limited OQAM Based Multi-Carrier Modulation Systems. - Hiromitsu Kunishima; Hisao Koga; Osamu Muta; Yoshihiko Akaiwa (VTC Spring, 2008)

Joint Use of Adaptive Equalization and Cyclic Noise Cancellation for Band-Limited OQAM Based Multi-Carrier Transmission in Power-Line Communication Systems. - Hiromitsu Kunishima; Hisao Koga; Osamu Muta; Yoshihiko Akaiwa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

A High-Speed Power-Line Communication System with Band-Limited OQAM Based Multi-Carrier Transmission. - Naohiro Kawabata; Hisao Koga; Osamu Muta; Yoshihiko Akaiwa (IEICE Trans. Commun., 2009)

Measurement of Differential Mode Impedance and Longitudinal Conversion Loss for In-Factory High-Speed PLC System using Three-Phase Power Distribution System. - Toshiyuki Wakisaka; Tohlu Matsushima; Hiroyuki Okumura; Hisao Koga; Nobuo Kuwabara; Yuki Fukumoto (ISPLC, 2020)