Reports the results of a series of measurements designed to determine the viability of using conduction current techniques for data transmission in the offshore platform environment. The results show that ranges predicted by some authors for conduction current systems in the open sea were not observed in practice. In particular, measurements conducted in the vicinity of a large metallic underwater structure show an increase in signal strength accompanied by a reduction in bandwidth compared with the open sea case. The signalling rates which could be accommodated in the vicinity of an under water structure were approximately 75% of the corresponding rates in the open sea. The noise amplitude at each test site was considerable, being composed predominantly of harmonics of the land based power frequency. Such noise can be reduced to acceptable levels using filtering techniques. For high signal-to-noise ratios typical signalling rate at a range of 100 m in the open sea was found to be 200 baud.
Conduction current signalling in the vicinity of a sub-sea offshore structure
Leitungsstrom-Signalisierung in der Umgebung seegestuetzter Strukturen
Radio and Electronic Engineer ; 53 , 7-8 ; 287-294
1983
8 Seiten, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
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