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This article is presented by:

Milica Stojanovic
Massachusetts Institute of Technology

Underwater Communications

Future systems / requirements


Today: point-to-point acoustic links
Future: autonomous networks for ocean observation
Examples of future networks:
ad hoc deployable sensor networks
autonomous fleets of cooperating AUVs


Types of nodes:
fixed, slowly moving, mobile
sensors, relays, gateways
Types of signals, system requirements:
low/high rate (~100 bps-100kbps)
real-time/non real-time
high/moderate reliability
Configurations:
stand alone
integrated (e.g., cabled observatories)

Overview
Channel characteristics
Signal processing: bandwidth-efficient underwater acoustic communications
Example: application to oil field monitoring
Future research

Communication channel / summary

Physical constraints of acoustic propagation:

limited, range-dependent bandwidth
time-varying multipath
low speed of sound (1500 m/s)

System constraints:

transducer bandwidth
battery power
half-duplex



For more information about this article,please follow the link:
http://seagrant.mit.edu/conferences/RPSE...-oct06.ppt