GB2462942A - Signal encoding for frequency division multiplexing on transmission lines - Google Patents

Signal encoding for frequency division multiplexing on transmission lines Download PDF

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Publication number
GB2462942A
GB2462942A GB0916118A GB0916118A GB2462942A GB 2462942 A GB2462942 A GB 2462942A GB 0916118 A GB0916118 A GB 0916118A GB 0916118 A GB0916118 A GB 0916118A GB 2462942 A GB2462942 A GB 2462942A
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GB
United Kingdom
Prior art keywords
frequency
component
carrier
data value
components
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
GB0916118A
Other versions
GB2462942B (en
GB0916118D0 (en
GB2462942B8 (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
Priority claimed from GBGB0712171.8A external-priority patent/GB0712171D0/en
Application filed by Aker Subsea Ltd filed Critical Aker Subsea Ltd
Publication of GB0916118D0 publication Critical patent/GB0916118D0/en
Publication of GB2462942A publication Critical patent/GB2462942A/en
Publication of GB2462942B publication Critical patent/GB2462942B/en
Application granted granted Critical
Publication of GB2462942B8 publication Critical patent/GB2462942B8/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
    • H04L27/2602—Signal structure
    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • 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
    • H04L27/2614—Peak power aspects
    • H04L27/2623—Reduction thereof by clipping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

A method of transmitting on a transmission line a set of carrier signals of which at least one component represents a respective data value and the carrier signals are of different frequencies ranging from a lowest frequency to a highest frequency, in which the respective component of each carrier above the lowest frequency is adjusted on transmission in accordance with a selected relationship between that respective component and the corresponding component of the next lower frequency so as to compensate for the frequency-dependent effect of the transmission line on those components. The components may be amplitudes. The relationship may be a ratio of the respective and corresponding components. Alternatively each respective component may be adjusted in accordance with a scaling factor dependent on the previous data value presented by the corresponding component of next lower carrier frequency, the scaling factor being a ratio between a predetermined value and the said corresponding component, the predetermined value depending on the said previous data value. The components may be phases and the phase of each carrier after the first may be set from the phase of the previous lower frequency carrier augmented by the ratio of the data value in bits and the number of bits that can be carried by the respective component.
GB0916118A 2007-06-25 2008-02-21 Signal encoding for frequency division multiplexing on transmission lines Active GB2462942B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0712171.8A GB0712171D0 (en) 2007-06-25 2007-06-25 Signal Encoding for Frequency Division Multiplexing on Transmission Lines
PCT/GB2008/000594 WO2009001024A1 (en) 2007-06-25 2008-02-21 Signal encoding for frequency division multiplexing on transmission lines

Publications (4)

Publication Number Publication Date
GB0916118D0 GB0916118D0 (en) 2009-10-28
GB2462942A true GB2462942A (en) 2010-03-03
GB2462942B GB2462942B (en) 2011-11-09
GB2462942B8 GB2462942B8 (en) 2011-12-07

Family

ID=41297262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0916118A Active GB2462942B8 (en) 2007-06-25 2008-02-21 Signal encoding for frequency division multiplexing on transmission lines

Country Status (1)

Country Link
GB (1) GB2462942B8 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201212591D0 (en) 2012-07-16 2012-08-29 Aker Subsea Ltd Subsea safety system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Antoniou S. et al., "High data rate transmission in the mid-latitude NVIS HF channel", IEE proceedings, Communications, vol. 153, no. 2, 1 April 2006, pp272-278, XP006026147 *
Der-Zheng Lin et al., "DAPSK-OFDM transmissions for high data-rate digital mobile radio", ISCAS 2001, Proceedings of the 2001 IEEE Int. Symposium on Circuits and Systems, vol. 2, 6 May 2001, pp417-420, XP010540667 *
Kaiming Liu et al., "High data rate transmission with 64-DAPSK over fading channel", Wireless Communications and Networking Conference, 2004, 21-25 March 2004, vol. 1, pp60-64, XP010708530 *

Also Published As

Publication number Publication date
GB2462942B (en) 2011-11-09
GB0916118D0 (en) 2009-10-28
GB2462942B8 (en) 2011-12-07

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