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    Feasibility study of non-invasive telemetry techniques for use with submarine telephone cables

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    WHOI-93-03.pdf (1.562Mb)
    Date
    1993-01
    Author
    Brown, Neil L.  Concept link
    Frye, Daniel E.  Concept link
    Proakis, John  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/1205
    DOI
    10.1575/1912/1205
    Keyword
     Ocean data telemetry; Undersea cables; Inductive coupling 
    Abstract
    The feasibility of using inductive coupling with existing submarine telephone cables for telemetry of data from ocean sensors was investigated. The submarine telephone cable was simulated with a computer model and the model results were tested experimentally by deploying 600 meters of coax cable in Woods Hole Harbor. In parallel a study of the optimum access methods and modulation and techniques was performed. Results of the feasibility study showed that a non-invasive technique for inductive coupling is not feasible for use with existing SF and SD coaxial cable designs. Signals induced in both conductors by a toroid encircling the cable remain identical as they propagate along the cable as a result of mutual inductance. Thus, no signals are apparent at the repeaters. Optimal use of cable bandwidth combines time division multiple access with trellis-coded QAM modulation.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    • WHOI Technical Reports
    Suggested Citation
    Brown, N. L., Frye, D. E., & Proakis, J. (1993). Feasibility study of non-invasive telemetry techniques for use with submarine telephone cables. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/1205
     

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