Title:
PARENT STATION DEVICE, CHILD STATION DEVICE, AND OPTICAL SIGNAL TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2008/012865
Kind Code:
A1
Abstract:
Provided is an optical signal transmission system capable of easily performing branching/multiplexing of an optical signal and maintaining a long-distance transmission of high quality, and not requiring a local oscillator of each child station. In a transmission side device (150) of the optical signal transmission system, a frequency converter (152) converts a digital RF signal into an analog IF signal and then performs signal branching/multiplexing. The analog IF signal is converted into a digital IF signal by an ADC (155). After this, a P/S (156) superimposes a clock signal on the digital IF signal. The resultant signal is converted into a digital optical signal by an E/O (157) for transmission to a reception side device (160). The reception side device (160) extracts a clock signal from the signal received by the S/P (162). Third frequency conversion means (166) generates a local signal from the clock signal. A frequency converter (165) uses the local signal to convert an IF signal into an RF signal and outputs it.
Inventors:
ODA KATSUYA
TOHGOH HITOMARO
TOHGOH HITOMARO
Application Number:
PCT/JP2006/314599
Publication Date:
January 31, 2008
Filing Date:
July 24, 2006
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
ODA KATSUYA
TOHGOH HITOMARO
ODA KATSUYA
TOHGOH HITOMARO
International Classes:
H04B10/2575; H04Q7/36
Domestic Patent References:
| WO2004091108A1 | 2004-10-21 |
Foreign References:
| JP2006166371A | 2006-06-22 | |||
| JP2000165354A | 2000-06-16 | |||
| JPH08149552A | 1996-06-07 | |||
| JP2006025293A | 2006-01-26 | |||
| JP2004153646A | 2004-05-27 | |||
| JP2004173133A | 2004-06-17 | |||
| JPH0670361A | 1994-03-11 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (Shintoshicenter Bldg. 24-1, Tsurumaki1-chome, Tama-sh, Tokyo 34, JP)
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