Development of a Physical Layer for Adaptive Underwater Acoustic Communications

For underwater acoustic modems to operate in a time-varying environment, in-mission adaptation is desirable. A physical layer has been designed that supports mechanisms for ad-hoc configuration changes based on (in-situ and indirectly obtained) channel and noise conditions. Coded preambles are used...

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Bibliographic Details
Main Authors: Blom, Koen C.H., Dol, Henry S., Berning, Frank, Van Walree, Paul A.
Format: Conference Proceeding
Language:English
Subjects:
adaptive modulation
Modems
Physical layer
Receivers
Switches
Synchronization
Transmitters
Underwater acoustic communications
Underwater communication
Online Access:Request full text
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Summary:For underwater acoustic modems to operate in a time-varying environment, in-mission adaptation is desirable. A physical layer has been designed that supports mechanisms for ad-hoc configuration changes based on (in-situ and indirectly obtained) channel and noise conditions. Coded preambles are used to instruct the receiver of a configuration change. To support indirect link feedback, a fixed bit-allocation scheme is proposed that provides a field for link quality information. Performance of the coded preambles versus payload delivery are studied in replay simulation. Eventually, thresholds for rate switching based on indirect link feedback of the output SNR are presented.
ISSN:2770-758X
DOI:10.1109/UComms56954.2022.9905679