Proceedings Article10.1109/AUV.1990.110471
High data rate acoustic telemetry for moving ROVs in a fading multipath shallow water environment
J. Catipovic,L.E. Freitag +1 more
- 05 Jun 1990
- pp 296-303
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TL;DR: In this article, a compact telemetry system for digital data telemetry at rates up to 10 kb/s over 1 to 10 km is presented for worst-case ocean acoustic channel conditions, and operates in the presence of source/receiver motion, fading and multiple transmission paths.
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Abstract: A compact telemetry system for digital data telemetry at rates up to 10 kb/s over 1 to 10 km is presented. The system is designed for worst-case ocean acoustic channel conditions, and operates in the presence of source/receiver motion, fading, and multiple transmission paths. In addition, the system incorporates spatial diversity by utilizing multiple hydrophones and data processing subsystems. This allows much more reliable operation under realistic circumstances where noise events and transducer masking are unavoidable. The result is a system specifically geared toward use at sea with a remotely operated vehicle (ROV). Preliminary dockside test results are presented to demonstrate the effectiveness of this multichannel system. >
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Citations
Underwater acoustic modem using multicarrier modulation
Lam Fat Yeung,Robin Bradbeer,E.T.M. Law,Angus Wu,Bin Li,Z.G. Gu +5 more
- 01 Jan 2003
TL;DR: An adaptive channel equalisation scheme with a LSM algorithm is used in order to reduce the multipath fading problem and can be further improved by a redundant carrier assignment and wavelet based MFM scheme.
6
The design and testing of a DSP, half-duplex, vertical, DPSK communication link
J.C. Jones,A. Di Meglio,L.S. Wang,R.F.W. Coates,A. Tedeschi,R.J. Stoner +5 more
- 06 Oct 1997
TL;DR: This paper presents a vertical communication system that uses an 'Analogue Devices' digital signal processor (DSP) at its heart, which controls the transmission of data and operative commands to and from a seafloor unit, using multi-phase, 2, 4 or 8, differential phase shift keying (DPSK).
6
•Dissertation
Model-based Cooperative Acoustic Navigation and Parameter Identification for Underactuated Underwater Vehicles
Zachary J. Harris
- 23 Sep 2019
TL;DR: Simulation and experimental results reported herein indicate the submerged UV position estimate from cooperative acoustic navigation with a kinematic model is poor and even unstable in the absence of ii, and an extension of a method to identify simultaneously UV dynamical plant model parameters and control-actuator parameters in 6 degree of freedom.
4
Elevators-autonomous transporters for deepsea benthic sample recovery
M. F. Bowen,P. J. Bernard,D.E. Gleason,Louis L. Whitcomb +3 more
- 11 Sep 2000
TL;DR: In this article, the authors describe the design, fabrication, operation and navigational tracking of 6,000 meter rated, nondestructive benthic sample transportation vehicles (elevators).
Range-based AUV navigation expressed in geodetic coordinates
Rami S. Jabari,Daniel J. Stilwell +1 more
- 01 Sep 2016
TL;DR: This work describes a range-based acoustic navigation system that utilizes range measurements from a single moving transponder with a known location to estimate the position of an autonomous underwater vehicle (AUV).
3
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Coherent Spread Spectrum Systems
Jack Kenneth Holmes
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TL;DR: This paper presents an introduction to Linear Pseudonoise Sequences, followed by a discussion of PN Code Spread Spectrum Systems, and a review of PCM Code Formatting and Spectra.
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Acoustic telemetry - An overview
TL;DR: The underwater channel and the limitations that it imposes upon acoustic telemetry systems are reviewed and some of the systems that have been built are surveyed and indicated how they use various communication system principles to overcome these limitations.
218