Centralized control method for fiber-optic microcell radio system. - Shunji Miura; Hirofumi Ichikawa; Ryoji Yamamoto (VTC, 1994)

Highly accurate PHS location service system. - Tomoyoshi Oono; Ryoji Yamamoto; Hideo Matsuki; Hideyuki Matsutani; Hiroyuki Ohtsuka; Seizo Onoe (PIMRC, 2002)

MMSE Mobile Station Positioning Method Using Signal Strength in Cellular Systems. - Hideyuki Matsutani; Ryoji Yamamoto; Hideo Matsuki; Tomoyoshi Oono; Seizo Onoe (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003)