NDLI: A new MFSK acoustic modem for operation in adverse underwater channels

Content Provider	IEEE Xplore Digital Library
Author	Scussel, K.F. Rice, J.A. Merriam, S.
Copyright Year	1997
Description	Author affiliation: Datasonics Inc., Cataumet, MA, USA (Scussel, K.F.)
Abstract	With US Navy SBIR funding, Datasonics has teamed with Delphi Communication Systems and Naval Command, Control & Ocean Surveillance Center, RDT&E Division (NRaD) to develop a new acoustic telemetry and ranging (telesonar) modem. Periodic transmission of digital message packets satisfies most telesonar applications, including data reporting from oceanographic sensors, controlling autonomous devices, monitoring offshore-oil equipment, and communicating with undersea vehicles. These applications are well served by robust, low-data-rate, noncoherent, multiple frequency shift keying (MFSK) signaling offering greater affordability, networkability, and energy conservation than coherent modems. Well designed MFSK signaling furthermore provides superior reliability in noisy, doubly spread, forward-scattered, horizontal channels such as those found in littoral ocean environments. This paper describes the design of the new telesonar type-A MFSK acoustic modem providing communication rates of 100 to 2400 bit/s. Improved performance in adverse transmission channels is obtained from increased signaling diversity and stronger coding techniques based on symbol sets derived from Hadamard matrices. The new product also preserves the 1-of-4 MFSK modulation mode used in the Datasonics ATM-850 modem. The parallel goal of reduced cost is achieved by the new modem electronics design and packaging.
Starting Page	247
Ending Page	254
File Size	791671
Page Count	8
File Format	PDF
ISBN	0780341082
DOI	10.1109/OCEANS.1997.634370
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-06
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Underwater acoustics Modems Communication system control Oceans Control systems Surveillance Acoustic devices Telemetry Acoustic sensors Monitoring
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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