Development of an Underwater Electric Field Modem

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Authors
  1. Pelavas, N.
  2. Heard, G.
  3. Schattschneider, G.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
Abstract
One of the major advantages of underwater acoustic communication is the extended ranges attainable using a high bit-rate acoustic modem, that results from the low attenuation of underwater acoustic energy. The effectiveness of propagation of acoustic signals between a source and receiver is inevitably accompanied by the unwanted effects of multipath, reverberation and ambient noise. Consequently, these factors require intense signal processing to account for the acoustic propagation effects in the transmitted data. Conversely, electromagnetic signals transmitted in the ocean are heavily attenuated by the conducting medium of seawater with attenuation increasing with frequency. This limited range in propagation implies multipath and reverberation are also minimized, unlike in acoustics. Therefore, an underwater electromagnetic modem could potentially have a simpler, cost-efficient design, with the trade-off in range of propagation. Multiple pairs of electromagnetic modems could simultaneously exchange data without causing interference with neighboring modems. This potentially could lead to increased network throughput.
Keywords
Underwater;Modem;Electromagnetic
Report Number
DRDC-RDDC-2015-N010 — External Literature
Date of publication
01 Jul 2015
Number of Pages
2
DSTKIM No
CA040747
CANDIS No
801812
Format(s):
Electronic Document(PDF)

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