The Next Milestone: A Multicarrier Acoustic MODEM with Channel- and Network-Adaptivity for Underwater Autonomous Distributed Systems

reportActive / Technical Report | Accession Number: ADA542191 | Open PDF

Abstract:

We have three objectives in this project 1 Make OFDM work underwater. The success of multicarrier modulation in the form of orthogonal-frequency-division-modulation OFDM in radio channels illuminates a clear path one could take towards high-rate underwater acoustic communications. However, earlier work on the application of OFDM in underwater has only had limited success. We aim to make OFDM work in underwater environments 2 Channel- and network-aware modulation, coding, and scheduling. We aim to develop a layered coding structure with joint inter- and intra-packet coding. Intra-packet coding uses error-correction codes to deal with channel distortion and ambient noise, while inter-packet coding uses erasure-correction codes to cope with channel and network disruptions. This layered coding approach facilitates non-flow-based data delivery over single or multiple routing-paths, and can autonomously-adapt to channel and network conditions and 3 Prototype development. We aim to develop a stand-alone OFDM modem prototype that integrates the innovative algorithms developed in this project.

Author(s):
Zhou, Shengli
Author Organization(s):
CONNECTICUT UNIV STORRS DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
Descriptive Note:
Annual rept.
Supplementary Note:
DOI: 10.21236/ADA542191
Pagination:
0007

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-07-1-0805
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.1.3_Switching and Routing; JCA_6.1_Information Transport; JCA_1_Force Support; JCA_6.3.3_Spectrum Management; JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_1.2_Force Preparation; JCA_3.2_Engagement; JCA_3_Force Application; JCA_6.3_Net Management; JCA_1.3_Human Capital Management; JCA_3.2.2_Non-Kinetic Means; JCA_8_Building Partnerships
Modernization Areas:
Autonomy
Communities of Interest:
Sensors
Descriptor(s):
*UNDERWATER COMMUNICATIONS, NETWORKS, FREQUENCY MODULATION, AMBIENT NOISE, UNDERWATER ACOUSTICS, ERROR CORRECTION CODES, ALGORITHMS, CODING
Field(s)/Group(s):
Radio Communications
Keyword(s):
OFDM(ORTHOGONAL FREQUENCY DIVISION MODULATION)
Report Date:
2010 Sep 30
Creation Date:
2011 May 18