NDLI: On the Design of Direct Sequence Spread-Spectrum Signaling for Range Estimation

Content Provider	IEEE Xplore Digital Library
Author	Bingham, B. Blair, B. Mindell, D.
Copyright Year	2007
Abstract	Precise range measurement by time-of-flight sonar is important for underwater positioning, oceanography (tomography) and marine geology (geodesy). This paper reports on the design of spread-spectrum codes for range measurement in a variety of important underwater environments. Direct sequence spread-spectrum (DSSS) signal processing has many advantages over continuous wave techniques for time-of-flight range estimation: improved precision, extended effective range, robustness to ambient or jamming noise, increased update rate, and simultaneous multi-user capability. Design of appropriate DSSS codes requires matching the code parameters to the acoustic operating environment to maximize system performance. We consider three canonical ocean environments: a laboratory test-tank, the littoral zone, and the deep water channel. The characteristics of these acoustic channel models directly influence the code design to maximize range estimate performance. We parameterize the design choices for DSSS codes by code type, code length, carrier frequency, and chip rate. The paper concludes with experimental results for spread- spectrum range estimation in a shallow water dynamic environment and on an operation ROV in deep water.
Starting Page	1
Ending Page	7
File Size	4703002
Page Count	7
File Format	PDF
ISBN	9780933957350
DOI	10.1109/OCEANS.2007.4449375
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-29
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Signal design Spread spectrum communication Level measurement Sea measurements Position measurement Sonar measurements Tomography Geology Geodesy Acoustic signal processing
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