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

Author

Freitag, Lee ; Grund, Matthew ; Singh, Sandipa ; Partan, James ; Koski, Peter ; Ball, Keenan

Author_Institution

Woods Hole Oceanogr. Instn., MA

fYear

2005

fDate

17-23 Sept. 2005

Firstpage

1086

Abstract

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

Keywords

frequency hop communication; frequency shift keying; modems; navigation; oceanographic equipment; oceanographic techniques; phase shift keying; underwater acoustic communication; 3 to 30 kHz; WHOI micromodem; acknowledgement capability; broadband navigation; frequency-hopping frequency-shift keying; narrow-band navigation; navigation system; polled mode; random-access mode; serial port specification; underwater acoustic communication; variable rate phase-coherent keying; Communication system control; Frequency; Hardware; Modems; Navigation; Remotely operated vehicles; Sonar detection; Underwater acoustics; Underwater communication; Underwater vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS, 2005. Proceedings of MTS/IEEE

Conference_Location

Washington, DC

Print_ISBN

0-933957-34-3

Type

conf

DOI

10.1109/OCEANS.2005.1639901

Filename

1639901