Invention Grant
US06388784B1 Digital optical transmitter and digital optical receiver making communication by superposing subdata on modulated waveform of main data
失效
数字光发射机和数字光接收机通过在主数据的调制波形上叠加子数据进行通信
- Patent Title: Digital optical transmitter and digital optical receiver making communication by superposing subdata on modulated waveform of main data
- Patent Title (中): 数字光发射机和数字光接收机通过在主数据的调制波形上叠加子数据进行通信
-
Application No.: US08928225Application Date: 1997-09-12
-
Publication No.: US06388784B1Publication Date: 2002-05-14
- Inventor: Makoto Nakamura , Yoshihiro Ohtani , Hiroshi Uno , Tsukasa Kaminokado , Hiroyuki Nakaoka , Yutaka Ikeda , Takashi Nakajima
- Applicant: Makoto Nakamura , Yoshihiro Ohtani , Hiroshi Uno , Tsukasa Kaminokado , Hiroyuki Nakaoka , Yutaka Ikeda , Takashi Nakajima
- Priority: JP8-243589 19960913; JP9-099072 19970416; JP9-114796 19970519
- Main IPC: H04B1000
- IPC: H04B1000
Abstract:
A digital optical transmitter includes a main/subdata modulation part for distorting a main data modulated signal waveform in response to sub-data, and an E/O conversion part for converting a subsequently obtained electrical modulated signal to an optical modulated signal and outputting the optical modulated signal. A digital optical receiver includes an O/E conversion part for receiving the optical modulated signal, converting it to an electrical modulated signal, and outputting the electrical modulated signal. Additionally, the digital optical receiver further includes a main/subdata demodulation part for demodulating the main data from the electrical modulated signal, while detecting whether or not a distortion signal responsive to the subdata is superposed on a subcarrier which forms the electrical modulated signal. If the distortion signal is superposed on a subcarrier, the main/subdata demodulator part demodulates the associated subdata.
Information query
