Feasibility study of non-invasive telemetry techniques for use with submarine telephone cables
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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.
Suggested CitationTechnical Report: Brown, Neil L., Frye, Daniel E., Proakis, John, "Feasibility study of non-invasive telemetry techniques for use with submarine telephone cables", 1993-01, DOI:10.1575/1912/1205, https://hdl.handle.net/1912/1205
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