Distance-measuring method and transmitting and receiving...

Details Distance-measuring method and transmitting and receiving... Distance-measuring method and transmitting and receiving...

H - Electricity

04

B

H04B 10/207 (2006.01) H04B 10/20 (2006.01) H04J 3/06 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2055954

In an optical communication system with a passive star coupler, measurement between a station and a central node should not interfere with the operation of other stations. Distance measurement is accomplished by determining the echo delay using a wavelength not being used by other stations. The system uses combined wavelength- and time-division multiplexing. One wavelength is always kept free for measurements if possible. For the measurement, the same data format as that employed during normal operation can be used. Measurement can be continuously repeated unchanged during operation.

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