Title :
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
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;
Conference_Titel :
OCEANS, 2005. Proceedings of MTS/IEEE
Conference_Location :
Washington, DC
Print_ISBN :
0-933957-34-3
DOI :
10.1109/OCEANS.2005.1639901
