An apparatus for measuring a distance between a first and second terminal includes a frame counter for determining a number of data frames traversing a distance between the first terminal 105 and the second terminal, a frame bit counter for determining a number of data clock bits offset between a transmitted data frame and a concurrently received data frame, a data clock phase detector for determining a phase difference between an RF data clock for the transmitted data frame and an RF data clock for the concurrently received data frame, and an optical carrier phase detector for determining a phase difference between an optical carrier used to transmit the transmitted data frame and an optical carrier for the concurrently received data frame. The distance between the first and second terminal is determined from a round trip transit time T between the first and second terminals.


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    Title :

    Continuous carrier optical phase optometric measurement over coherent optical communication link


    Contributors:

    Publication date :

    2018-12-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr / B64G Raumfahrt , COSMONAUTICS / G08B SIGNALLING OR CALLING SYSTEMS , Signalisier- oder Rufsysteme / G01S RADIO DIRECTION-FINDING , Funkpeilung / H04B TRANSMISSION , Übertragung / H04J Multiplex-Verkehr , MULTIPLEX COMMUNICATION



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