About KIKUCHI Nobuhiko
About Hitachi Ltd., Kanagawa, JPN
About Proceedings of SPIE
About optical communication
About QPSK
About digital modulation
About transmitter
About receiver
About system architecture
About differential detection
About synchronous detection
About review
About DQPSK
About PM-QPSK
About multi-level modulation
About Optical communication systems and equipment
About 多値変調
About 送信機
About 受信機
About 設計