Direct-detection optical synchronous CDMA systems with interference canceller using group information codes. - Hiroshi Sawagashira; Katsuhiro Kamakura; Tomoaki Ohtsuki; Iwao Sasase (GLOBECOM, 2000)

An embedded transmission method of PPM signaling constructed of parallel error correcting codes for optical CDMA. - Katsuhiro Kamakura; Iwao Sasase (GLOBECOM, 2001)

Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing. - Katsuhiro Kamakura; Iwao Sasase (ICC, 2001)