A Discretely Adaptive Delta Modulation Codec. - Kunihiko Niwa; Akira Yukawa; Atsushi Tomozawa (IEEE Trans. Commun., 1981)

A New Channel Bank with Block Companding. - Kunihiko Niwa; Takashi Araseki; Atsushi Tomozawa (IEEE Trans. Commun., 1982)

International Connection of Plesiochronous Networks via TDMA Satellite Link. - Kazunori Inagaki; Yasuo Hirata; Fumio Takahata; Akira Ogawa; Kunihiko Niwa (IEEE J. Sel. Areas Commun., 1983)

Multipar Crosstalk in Synchronous PCM Systems. - Akira Kanemasa; K. Makino; H. Kobayashi; Kunihiko Niwa (ICC (2), 1984)

Intelligent Communication Terminal for Integrating Voice Data and Video Signals. - Setsuo Tsuruta; K. Mitsuhashi; M. Mera; Kunihiko Niwa (ICC, 1986)

An Adaptive-Step Sign Algorithm for Fast Convergence of a Data Echo Canceller. - Akira Kanemasa; Kunihiko Niwa (IEEE Trans. Commun., 1987)