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GB2320401A - Improved multicarrier transmission system - Google Patents

Improved multicarrier transmission system

Info

Publication number
GB2320401A
GB2320401A GB9709849A GB9709849A GB2320401A GB 2320401 A GB2320401 A GB 2320401A GB 9709849 A GB9709849 A GB 9709849A GB 9709849 A GB9709849 A GB 9709849A GB 2320401 A GB2320401 A GB 2320401A
Authority
GB
United Kingdom
Prior art keywords
symbols
transmitter
receiver
decoded
communication link
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
GB9709849A
Other versions
GB2320401B (en
GB9709849D0 (en
Inventor
Michael Andrew Tzannes
Stuart Daniel Sandberg
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.)
Aware Inc
Original Assignee
Aware Inc
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 Aware Inc filed Critical Aware Inc
Publication of GB9709849D0 publication Critical patent/GB9709849D0/en
Publication of GB2320401A publication Critical patent/GB2320401A/en
Application granted granted Critical
Publication of GB2320401B publication Critical patent/GB2320401B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
    • 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
    • H04L27/2649—Demodulators
    • H04L27/26534—Pulse-shaped multi-carrier, i.e. not using rectangular window
    • H04L27/26538—Filtering per subband or per resource block, e.g. universal filtered multicarrier [UFMC] or generalized frequency division multiplexing [GFDM]
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier
    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03522—Frequency domain

Landscapes

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

Abstract

The transmitter (100) receives a sequence of symbols and groups the symbols into a block of symbols for which transmission is to be initiated in a following frame. At the receiver (150), the signal from the communication link (113) is decoded by a plurality of finite impulse response (FIR) filters that are matched to the waveforms modulated by the symbols in the transmitter (101). Errors arising from synchronization errors between the transmitter (101) and receiver (150) are corrected by forming weighted sums of the symbols decoded by the FIR filters for the current frame and frames received prior to and/or after the current frame. The weights are determined by training samples sent on the communication link (113) prior to actual transmissions.
GB9709849A 1995-11-17 1995-11-17 Improved multicarrier transmission system Expired - Lifetime GB2320401B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1995/015115 WO1997026711A1 (en) 1995-11-17 1995-11-17 Improved multicarrier transmission system

Publications (3)

Publication Number Publication Date
GB9709849D0 GB9709849D0 (en) 1997-07-09
GB2320401A true GB2320401A (en) 1998-06-17
GB2320401B GB2320401B (en) 2000-04-12

Family

ID=22250145

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9709849A Expired - Lifetime GB2320401B (en) 1995-11-17 1995-11-17 Improved multicarrier transmission system

Country Status (3)

Country Link
AU (1) AU708318B2 (en)
GB (1) GB2320401B (en)
WO (1) WO1997026711A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679227A (en) * 1985-05-20 1987-07-07 Telebit Corporation Ensemble modem structure for imperfect transmission media
US5048054A (en) * 1989-05-12 1991-09-10 Codex Corporation Line probing modem
US5206886A (en) * 1990-04-16 1993-04-27 Telebit Corporation Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in mulicarrier modems
US5285474A (en) * 1992-06-12 1994-02-08 The Board Of Trustees Of The Leland Stanford, Junior University Method for equalizing a multicarrier signal in a multicarrier communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679227A (en) * 1985-05-20 1987-07-07 Telebit Corporation Ensemble modem structure for imperfect transmission media
US5048054A (en) * 1989-05-12 1991-09-10 Codex Corporation Line probing modem
US5206886A (en) * 1990-04-16 1993-04-27 Telebit Corporation Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in mulicarrier modems
US5285474A (en) * 1992-06-12 1994-02-08 The Board Of Trustees Of The Leland Stanford, Junior University Method for equalizing a multicarrier signal in a multicarrier communication system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE Communications Magazine, May 1990,pages 5-14 *

Also Published As

Publication number Publication date
GB2320401B (en) 2000-04-12
AU4166696A (en) 1997-08-11
AU708318B2 (en) 1999-07-29
WO1997026711A1 (en) 1997-07-24
GB9709849D0 (en) 1997-07-09

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20121115 AND 20121121

PE20 Patent expired after termination of 20 years

Expiry date: 20151116