GB2459806A - Indicating and detecting the start of signal transmission employing frequency division multiplexing - Google Patents

Indicating and detecting the start of signal transmission employing frequency division multiplexing Download PDF

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Publication number
GB2459806A
GB2459806A GB0915317A GB0915317A GB2459806A GB 2459806 A GB2459806 A GB 2459806A GB 0915317 A GB0915317 A GB 0915317A GB 0915317 A GB0915317 A GB 0915317A GB 2459806 A GB2459806 A GB 2459806A
Authority
GB
United Kingdom
Prior art keywords
frequency division
transmission line
burst
signals
indicating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0915317A
Other versions
GB0915317D0 (en
GB2459806B (en
Inventor
Richard Carter
Mark Hathaway
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aker Solutions Ltd
Original Assignee
Aker Subsea Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aker Subsea Ltd filed Critical Aker Subsea Ltd
Publication of GB0915317D0 publication Critical patent/GB0915317D0/en
Publication of GB2459806A publication Critical patent/GB2459806A/en
Application granted granted Critical
Publication of GB2459806B publication Critical patent/GB2459806B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3078—Circuits generating control signals for digitally modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping

Abstract

A modem for use with a subsea transmission line comprises a digital signal processor (25) responsive to a succession of segments of a data signal to produce a respective set of orthogonal frequency division multiplexed signals and to transmit those signals as a burst (70) on the transmission line, and to prepend the burst with a start signal (66) comprising a cyclically time-varying signal envelope-modulated with a Gaussian waveform (67). The modem is also arranged to convert signals received from the transmission line into a succession of digital samples and to process those samples to obtain an indication of the peak of the Gaussian waveform whereby to provide a datum for decoding a received burst of OFDM signals.
GB0915317A 2007-04-17 2008-02-12 Indicating and detecting the start of signal transmission employing frequency division multiplexing Active GB2459806B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0707334.9A GB0707334D0 (en) 2007-04-17 2007-04-17 Indicating and detecting the start of signal transmission employing frequency division multiplexing
PCT/GB2008/000461 WO2008125793A1 (en) 2007-04-17 2008-02-12 Indicating and detecting the start of signal transmission employing frequency division multiplexing

Publications (3)

Publication Number Publication Date
GB0915317D0 GB0915317D0 (en) 2009-10-07
GB2459806A true GB2459806A (en) 2009-11-11
GB2459806B GB2459806B (en) 2011-09-14

Family

ID=38116824

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0707334.9A Ceased GB0707334D0 (en) 2007-04-17 2007-04-17 Indicating and detecting the start of signal transmission employing frequency division multiplexing
GB0915317A Active GB2459806B (en) 2007-04-17 2008-02-12 Indicating and detecting the start of signal transmission employing frequency division multiplexing

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0707334.9A Ceased GB0707334D0 (en) 2007-04-17 2007-04-17 Indicating and detecting the start of signal transmission employing frequency division multiplexing

Country Status (6)

Country Link
US (1) US8532165B2 (en)
BR (1) BRPI0810476A2 (en)
GB (2) GB0707334D0 (en)
MY (1) MY145956A (en)
NO (1) NO20093354L (en)
WO (1) WO2008125793A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2528527B8 (en) * 2008-12-18 2016-09-21 Ge Oil & Gas Uk Ltd Subsea electronic module
CN102325113B (en) * 2011-05-18 2013-10-09 福州瑞芯微电子有限公司 Software and hardware combined broadcast-positioning baseband processor chip
EP2543811A1 (en) 2011-07-06 2013-01-09 Vetco Gray Controls Limited Subsea electronics module
EP2549056A1 (en) * 2011-07-22 2013-01-23 Siemens Aktiengesellschaft Subsea communication system
EP2833591A1 (en) * 2013-07-31 2015-02-04 Siemens Aktiengesellschaft Subsea data communication interface unit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053665A1 (en) * 1998-04-14 1999-10-21 Fraunhnofer-Gesellschaft Zur Förderung Der Angewand Ten Forschung E.V. Frame structure and frame synchronization for multicarrier systems
US6944119B1 (en) * 1998-10-29 2005-09-13 Matsushita Electric Industrial Co., Ltd. OFDM receiving apparatus, OFDM transmission apparatus and OFDM communication method
US20060039270A1 (en) * 2004-06-28 2006-02-23 Thomas Strohmer Method for pulse shape design for OFDM

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6970416B1 (en) * 2000-07-07 2005-11-29 Telecommunications Research Laboratories OFDM system with simple terminals
GB0712171D0 (en) * 2007-06-25 2007-08-01 Kop Ltd Signal Encoding for Frequency Division Multiplexing on Transmission Lines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999053665A1 (en) * 1998-04-14 1999-10-21 Fraunhnofer-Gesellschaft Zur Förderung Der Angewand Ten Forschung E.V. Frame structure and frame synchronization for multicarrier systems
US6944119B1 (en) * 1998-10-29 2005-09-13 Matsushita Electric Industrial Co., Ltd. OFDM receiving apparatus, OFDM transmission apparatus and OFDM communication method
US20060039270A1 (en) * 2004-06-28 2006-02-23 Thomas Strohmer Method for pulse shape design for OFDM

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Beaver S et al, "Optimal OFDM Design for time-frequency dispersive channels", vol. 51, no. 7, 1 July 2003, pages 1111-1122 *
Hans G. Feichtinger and Thomas Strohmer, EDS, "Advances in Gabor analysis", 1 January 2002, Birkhauser, Boston MA, chapter 12 *
Hazy L et al: "Synchronisation of OFDM Systems over Frequency Selective Fading Channels" Proc. of the IEEE Vehicular Technology Conference, Phoenix, AZ, USA, Vol. 3, 4 May 1997, pages 2094-2098. *
Warner W D et al, "OFDM Frame synchronisation for mobile radio data communication" IEEE Transactions on Vehicular Technology, vol. 42, no. 3, 1 August 1993 *

Also Published As

Publication number Publication date
US20100220773A1 (en) 2010-09-02
WO2008125793A1 (en) 2008-10-23
BRPI0810476A2 (en) 2014-11-11
GB0707334D0 (en) 2007-05-23
GB0915317D0 (en) 2009-10-07
NO20093354L (en) 2009-11-17
MY145956A (en) 2012-05-31
GB2459806B (en) 2011-09-14
US8532165B2 (en) 2013-09-10

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