Combined equalisation and beamforming to achieve 20kbits/s acoustic telemetry for ROVs

J. A. Neasham; D. Thompson; A. D. Tweedy; M. A. Lawlor; O. R. Hinton; A. E. Adams; B. S. Sharif

Combined equalisation and beamforming to achieve 20kbits/s acoustic telemetry for ROVs

J. A. Neasham, D. Thompson, A. D. Tweedy, M. A. Lawlor, O. R. Hinton, A. E. Adams, B. S. Sharif

Electrical Engineering

Newcastle University

Research output: Contribution to journal › Conference article › peer-review

24 Scopus citations

Abstract

For many ROV applications it is desirable to receive real time video and sonar images from the vehicle, without the need for an umbilical cable. With a required operating region of 2km range and 100m depth, acoustic telemetry is the only realistic option. The major problems in acoustic telemetry through such a channel are limited bandwidth, time-varying multipath due to surface and bottom reflections and Doppler effects caused by relative motion of the ROV and surface vessel. To achieve the data rates required for real time image transmission, bandwidth efficient modulation schemes such as QPSK must be employed. It was found that a combination of adaptive beamforming and equalisation was required to combat the effects of multipath and achieve an acceptable bit error rate. Experimental results are presented which demonstrate data rates of 20kbits/s (10ksym/s, QPSK) achieved over ranges up to 2km, with bit error rates <10^-4.

Original language	British English
Pages (from-to)	988-993
Number of pages	6
Journal	Oceans Conference Record (IEEE)
Volume	2
State	Published - 1996
Event	Proceedings of 1996 MTS/IEEE Oceans Conference. Part Suppl - Fort Lauderdale, FL, USA Duration: 23 Sep 1996 → 26 Sep 1996

Cite this

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title = "Combined equalisation and beamforming to achieve 20kbits/s acoustic telemetry for ROVs",

abstract = "For many ROV applications it is desirable to receive real time video and sonar images from the vehicle, without the need for an umbilical cable. With a required operating region of 2km range and 100m depth, acoustic telemetry is the only realistic option. The major problems in acoustic telemetry through such a channel are limited bandwidth, time-varying multipath due to surface and bottom reflections and Doppler effects caused by relative motion of the ROV and surface vessel. To achieve the data rates required for real time image transmission, bandwidth efficient modulation schemes such as QPSK must be employed. It was found that a combination of adaptive beamforming and equalisation was required to combat the effects of multipath and achieve an acceptable bit error rate. Experimental results are presented which demonstrate data rates of 20kbits/s (10ksym/s, QPSK) achieved over ranges up to 2km, with bit error rates <10-4.",

author = "Neasham, {J. A.} and D. Thompson and Tweedy, {A. D.} and Lawlor, {M. A.} and Hinton, {O. R.} and Adams, {A. E.} and Sharif, {B. S.}",

year = "1996",

language = "British English",

volume = "2",

pages = "988--993",

journal = "Oceans Conference Record (IEEE)",

issn = "0197-7385",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

note = "Proceedings of 1996 MTS/IEEE Oceans Conference. Part Suppl ; Conference date: 23-09-1996 Through 26-09-1996",

}

TY - JOUR

T1 - Combined equalisation and beamforming to achieve 20kbits/s acoustic telemetry for ROVs

AU - Neasham, J. A.

AU - Thompson, D.

AU - Tweedy, A. D.

AU - Lawlor, M. A.

AU - Hinton, O. R.

AU - Adams, A. E.

AU - Sharif, B. S.

PY - 1996

Y1 - 1996

N2 - For many ROV applications it is desirable to receive real time video and sonar images from the vehicle, without the need for an umbilical cable. With a required operating region of 2km range and 100m depth, acoustic telemetry is the only realistic option. The major problems in acoustic telemetry through such a channel are limited bandwidth, time-varying multipath due to surface and bottom reflections and Doppler effects caused by relative motion of the ROV and surface vessel. To achieve the data rates required for real time image transmission, bandwidth efficient modulation schemes such as QPSK must be employed. It was found that a combination of adaptive beamforming and equalisation was required to combat the effects of multipath and achieve an acceptable bit error rate. Experimental results are presented which demonstrate data rates of 20kbits/s (10ksym/s, QPSK) achieved over ranges up to 2km, with bit error rates <10-4.

AB - For many ROV applications it is desirable to receive real time video and sonar images from the vehicle, without the need for an umbilical cable. With a required operating region of 2km range and 100m depth, acoustic telemetry is the only realistic option. The major problems in acoustic telemetry through such a channel are limited bandwidth, time-varying multipath due to surface and bottom reflections and Doppler effects caused by relative motion of the ROV and surface vessel. To achieve the data rates required for real time image transmission, bandwidth efficient modulation schemes such as QPSK must be employed. It was found that a combination of adaptive beamforming and equalisation was required to combat the effects of multipath and achieve an acceptable bit error rate. Experimental results are presented which demonstrate data rates of 20kbits/s (10ksym/s, QPSK) achieved over ranges up to 2km, with bit error rates <10-4.

UR - http://www.scopus.com/inward/record.url?scp=0030379849&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0030379849

SN - 0197-7385

VL - 2

SP - 988

EP - 993

JO - Oceans Conference Record (IEEE)

JF - Oceans Conference Record (IEEE)

T2 - Proceedings of 1996 MTS/IEEE Oceans Conference. Part Suppl

Y2 - 23 September 1996 through 26 September 1996

ER -

Combined equalisation and beamforming to achieve 20kbits/s acoustic telemetry for ROVs

Abstract

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