Sadao Takenaka

A New 90 MBPS 68 APSK Modem with Honeycomb Constellation for Digital Radio Relay Systems

Hiroshi Nakamura, Yoshimasa Daido, Morihiko Minowa, 1988 .

A 256 QAM digital radio system with a low rolloff factor of 20% for attaining 6.75 bps/Hz

Eisuke Fukuda, Yoshimasa Daido, H. Nakamura, 1988 .

A New 4 GHz 90 Mbps Digital Radio System Using 64-QAM Modulation

Hiroshi Nakamura, Yukio Takeda, Toshiaki Sakane, 1984, ICC.

Multilevel QAM Modulation Techniques for Digital Microwave Radios

Hiroshi Nakamura, Eisuke Fukuda, Toshiaki Sakane, 1987, IEEE J. Sel. Areas Commun..

A digital signal processing demodulator with a wide frequency acquisition range

Hideto Furukawa, Y. Tozawa, T. Takenaka, 1990, IEEE International Conference on Communications, Including Supercomm Technical Sessions.

The Adaptive Transversal Equalizer for 90MBPS 64-QAM Radio Relay System

Koji Ikuta, Hiroshi Yamada, Yoshimasa Daido, 1984, ICC.