WO2002087186A3 - Channel characterization and rate selection in dsl systems - Google Patents

Channel characterization and rate selection in dsl systems Download PDF

Info

Publication number
WO2002087186A3
WO2002087186A3 PCT/US2002/012857 US0212857W WO02087186A3 WO 2002087186 A3 WO2002087186 A3 WO 2002087186A3 US 0212857 W US0212857 W US 0212857W WO 02087186 A3 WO02087186 A3 WO 02087186A3
Authority
WO
WIPO (PCT)
Prior art keywords
channel characterization
rate selection
transmitted
dsl systems
channel condition
Prior art date
Application number
PCT/US2002/012857
Other languages
French (fr)
Other versions
WO2002087186A2 (en
Inventor
Farrokh Rashid-Farrokhi
Cindy C Wang
Steven R Blackwell
Original Assignee
Centillium Communications 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 Centillium Communications Inc filed Critical Centillium Communications Inc
Publication of WO2002087186A2 publication Critical patent/WO2002087186A2/en
Publication of WO2002087186A3 publication Critical patent/WO2002087186A3/en

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
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/0046—Determination of how many bits are transmitted on different sub-channels
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1438—Negotiation of transmission parameters prior to communication
    • H04L5/1446—Negotiation of transmission parameters prior to communication of transmission speed
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1438—Negotiation of transmission parameters prior to communication
    • H04L5/1453—Negotiation of transmission parameters prior to communication of modulation type
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling

Abstract

Techniques for characterizing channel condition that do not require equalizer training are disclosed. Probe signals having different symbol rates are used in the channel characterization. Achievable SNR at various symbol rates (both transmitted and not transmitted) can be predicted. Achievable SNR is calculated based on the received signal PSD when a probe signal is present and the estimated crosstalk/noise PSD during silence periods. An optimal combination of modulation type and symbol rate based on the channel condition can also be identified.
PCT/US2002/012857 2001-04-23 2002-04-22 Channel characterization and rate selection in dsl systems WO2002087186A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US28590401P 2001-04-23 2001-04-23
US60/285,904 2001-04-23
US2464101A 2001-12-17 2001-12-17
US10/024,641 2001-12-17

Publications (2)

Publication Number Publication Date
WO2002087186A2 WO2002087186A2 (en) 2002-10-31
WO2002087186A3 true WO2002087186A3 (en) 2003-01-23

Family

ID=26698690

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/012857 WO2002087186A2 (en) 2001-04-23 2002-04-22 Channel characterization and rate selection in dsl systems

Country Status (1)

Country Link
WO (1) WO2002087186A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7672367B1 (en) * 2005-08-12 2010-03-02 Adtran, Inc. System and method for selecting data rates of initialization signals
EP1796282B1 (en) * 2005-12-08 2010-05-26 Alcatel Lucent Method and apparatus for identifying crosstalk sources
WO2009080840A1 (en) * 2007-12-20 2009-07-02 Sidsa (Semiconductores Investigación Y Diseño, S.A.) Method for estimating noise in a digital communications system with channel equalization
US8351872B2 (en) 2008-08-11 2013-01-08 Research In Motion Limited System and method for communicating using an in-vehicle system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5495483A (en) * 1995-01-26 1996-02-27 Motorola, Inc. Method and apparatus for allocating carrier channels
WO2000067419A1 (en) * 1999-05-03 2000-11-09 Teradyne, Inc. Adsl test system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5495483A (en) * 1995-01-26 1996-02-27 Motorola, Inc. Method and apparatus for allocating carrier channels
WO2000067419A1 (en) * 1999-05-03 2000-11-09 Teradyne, Inc. Adsl test system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"NETWORK AND CUSTOMER INSTALLATION INTERFACES - ASYMMETRIC DIGITAL SUBSCRIBER LINE (ADSL) METALLIC INTERFACE", AMERICAN NATIONAL STANDARD, XX, XX, 1995, pages A,B,I - XIII,1-170, XP000667442 *
PEETERS T T J M ET AL: "STATISTICS ON EXPONENTIAL AVERAGING OF PERIODOGRAMS", IEEE TRANSACTIONS ON SIGNAL PROCESSING, IEEE, INC. NEW YORK, US, vol. 43, no. 7, July 1995 (1995-07-01), pages 1631 - 1636, XP000524101, ISSN: 1053-587X *

Also Published As

Publication number Publication date
WO2002087186A2 (en) 2002-10-31

Similar Documents

Publication Publication Date Title
DE60027723D1 (en) FLEXIBLE UPWARD BRUSH OF PROFILE PARAMETERS FOR IMPROVING SHORT BURST IMPULSE RATIO SIGNALS
AU615820B2 (en) Computer controlled adaptive speakerphone
US6532215B1 (en) Device and method for network communications and diagnostics
WO1999050969A3 (en) Equalizer, using krakovian algebra, for multicarrier transmission
CA2394826A1 (en) Systems and methods for loop length and bridged tap length determination of a transmission line
WO2002033925A3 (en) Data allocation for multicarrier transmission
CA2251489A1 (en) Communications methods and apparatus
WO2002013405A3 (en) Systems and methods for characterizing transmission lines in a multi-carrier dsl environment
WO1997049212A3 (en) Apparatus and method of determining symbol rate and a carrier frequency
FI884273A (en) FM-MOTTAGARE MED FOERBAETTRAT GENSVAR PAO FOER RAYLEIGH-FAEDNING UTSATTA MOTTAGNA SIGNALER.
WO2002067526A3 (en) Channel estimation in multicarrier transmission systems
US7388909B2 (en) Initialization method for a network system
AU1303600A (en) Channel estimator with variable number of taps
AU1025092A (en) Device for the coherent demodulation of time-frequency interlaced digital data, with estimation of the frequency response of the transmission channel and threshold, and corresponding transmitter
WO2002023844A3 (en) Method and orthogonal frequency division multiplexing (ofdm) receiver for reducing the influence of harmonic interferences on ofdm transmission systems
EP0682437A3 (en) Device and method for automatically controlling sound volume in a communication apparatus
US5187741A (en) Enhanced acoustic calibration procedure for a voice switched speakerphone
AU2002366948A1 (en) Joint demodulation using a viterbi equalizer having an adaptive total number of states
DE69419918T2 (en) METHOD AND DEVICE FOR DETERMINING THE USE OF A SIGNAL
WO2006005020A3 (en) Multi-carrier communication using adaptive tone-pruning
MY124731A (en) Method and apparatus for estimating a frequency offset by combining pilot symbols and data symbols
WO2002078206A3 (en) Bi-directional communication system with echo cancellation
WO2003021845A8 (en) Communicating data using wideband communications
EP1902557B1 (en) Carrier detection in transmission lines
WO2002087186A3 (en) Channel characterization and rate selection in dsl systems

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP