Distance-measuring method and transmitting and receiving station

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

1991-11-22

1993-05-18

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

359110, 359121, H04J 100

Patent

active

052125343

ABSTRACT:
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.

REFERENCES:
patent: 5077729 (1991-12-01), Wong

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