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The WHOI micro-modem: an acoustic communications and navigation system for multiple platforms

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6 Author(s)
Freitag, L. ; Woods Hole Oceanogr. Instn., MA ; Grund, M. ; Singh, S. ; Partan, J.
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The micro-modem is a compact, low-power, underwater acoustic communications and navigation subsystem. It has the capability to perform low-rate frequency-hopping frequency-shift keying (FH-FSK), variable rate phase-coherent keying (PSK), and two different types of long base line navigation, narrow-band and broadband. The system can be configured to transmit in four different bands from 3 to 30 kHz, with a larger board required for the lowest frequency. The user interface is based on the NMEA standard, which is a serial port specification. The modem also includes a simple built-in networking capability which supports up to 16 units in a polled or random-access mode and has an acknowledgement capability which supports guaranteed delivery transactions. The paper contains a detailed system description and results from several tests are also presented

Published in:

OCEANS, 2005. Proceedings of MTS/IEEE

Date of Conference:

17-23 Sept. 2005

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