Optical communications – Receiver – Including postcompensation
Reexamination Certificate
2005-07-04
2009-10-20
Sedighian, M. R. (Department: 2613)
Optical communications
Receiver
Including postcompensation
C398S208000, C398S154000, C398S158000
Reexamination Certificate
active
07606503
ABSTRACT:
In an optical transmission system in which a pulse signal is converted into an optical signal before transmission, a pulse signal demodulation device capable of correctly demodulating the pulse signal is provided. An optical-to-electrical conversion section (31) converts a received optical signal into an electrical signal, and outputs the electrical signal as a received signal. A reception waveform information calculating section (33) outputs, as reception waveform information, information about a shape of a waveform of a short-pulse signal on which a distortion occurring during the time when a short-pulse signal is converted into an optical signal to when the optical signal is converted into a received signal by the optical-to-electrical conversion section (31), is reflected. A template signal generating section (34) generates a template signal which has a waveform on which a distortion similar to a distortion occurring in the received signal is reflected and is in synchronization with the received signal, based on the reception waveform information and a synchronization signal which is in synchronization with the received signal. A correlation section (32) obtains a correlation between waveforms of the received signal converted by the optical-to-electrical conversion section and the template signal to demodulate the pulse signal.
REFERENCES:
patent: 5687169 (1997-11-01), Fullerton
patent: 5832035 (1998-11-01), Fullerton
patent: 6549567 (2003-04-01), Fullerton
patent: 6928246 (2005-08-01), Fuse
patent: 7085501 (2006-08-01), Rickard et al.
patent: 7460793 (2008-12-01), Taylor
patent: 2003/0189975 (2003-10-01), Fullerton
patent: 11-504480 (1998-04-01), None
patent: 2004-350284 (2004-12-01), None
Vincenzo Lottici et al., “Channel Estimation for Ultra-Wideband Communications”, IEEE Journal on Selected Areas in Communications, vol. 20, Issue 9, Dec. 2002, pp. 1638-1645.
Zhengdao Wang et al., “Ultra Wide-Band Communications With Blind Channel Estimation Based on First-Order Statistics”, IEEE International Conference on Acoustics, Speech and Signal Processing 2004, vol. 4, May 17, 2004, pp. IV-529 to IV-532.
Takatoshi Ogawa et al., “UWB over Fiber Denso System no Kaihatsu to Denpan Sokutei eno Oyo”, 2004 Nen the Institute of Electronics, Information and Communication Engineers Sogo Taikai Koen Ronbunshu, Kiso Kyokai, Mar. 8, 2004, p. 170.
Fuse Masaru
Ikushima Tsuyoshi
Panasonic Corporation
Sedighian M. R.
Wenderoth , Lind & Ponack, L.L.P.
LandOfFree
Pulse signal demodulation device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulse signal demodulation device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse signal demodulation device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4143947