CA2505051A1 - Fast equalizer training and frame synchronization algorithms for discrete multi-tone (dmt) system - Google Patents

Fast equalizer training and frame synchronization algorithms for discrete multi-tone (dmt) system

Info

Publication number
CA2505051A1
CA2505051A1 CA002505051A CA2505051A CA2505051A1 CA 2505051 A1 CA2505051 A1 CA 2505051A1 CA 002505051 A CA002505051 A CA 002505051A CA 2505051 A CA2505051 A CA 2505051A CA 2505051 A1 CA2505051 A1 CA 2505051A1
Authority
CA
Canada
Prior art keywords
modem
dmt
cap
tone
frame synchronization
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
CA002505051A
Other languages
French (fr)
Other versions
CA2505051C (en
Inventor
Song S. Wu
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Incorporated
Song S. Wu
Timm, William C.
Chen, Walter Y.
Frantz, Gene A.
Garcia, Domingo G.
Lu, Xiaolin
Mannering, Dennis G.
Polley, Michael O.
Riley, Terence J.
Shaver, Donald P.
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 Texas Instruments Incorporated, Song S. Wu, Timm, William C., Chen, Walter Y., Frantz, Gene A., Garcia, Domingo G., Lu, Xiaolin, Mannering, Dennis G., Polley, Michael O., Riley, Terence J., Shaver, Donald P. filed Critical Texas Instruments Incorporated
Priority claimed from CA002217073A external-priority patent/CA2217073C/en
Publication of CA2505051A1 publication Critical patent/CA2505051A1/en
Application granted granted Critical
Publication of CA2505051C publication Critical patent/CA2505051C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Communication Control (AREA)

Abstract

A modem that operates selectively in the voice-band frequency band and at higher frequency bands is provided. This modem supports multiple line codes, like DMT and CAP. The modem uses a Digital Signal Processor (DSP), so that different existing ADSL line codes, such as Discrete MultiTone (DMT) and Carrierless AM/PM (CAP), can be implemented on the same hardware platform. The modem negotiates in real-time, for a desired line transmission rate to accommodate line condition and service-cost requirement. A new synchronization startup procedure for CAP based MDSL modems is provided. The handshake protocol and receiver algorithm allow reliable modem synchronization over severely amplitude distorted channels such as standard telephone twisted-pair wire.
CA002505051A 1997-10-01 1997-10-01 Fast equalizer training and frame synchronization algorithms for discrete multi-tone (dmt) system Expired - Fee Related CA2505051C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002217073A CA2217073C (en) 1996-05-09 1997-10-01 Multimode digital modem

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002217073A Division CA2217073C (en) 1996-05-09 1997-10-01 Multimode digital modem

Publications (2)

Publication Number Publication Date
CA2505051A1 true CA2505051A1 (en) 1999-04-01
CA2505051C CA2505051C (en) 2008-09-09

Family

ID=34658540

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002505051A Expired - Fee Related CA2505051C (en) 1997-10-01 1997-10-01 Fast equalizer training and frame synchronization algorithms for discrete multi-tone (dmt) system

Country Status (1)

Country Link
CA (1) CA2505051C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3507971A4 (en) * 2016-09-01 2020-01-22 NBN Co Limited Distribution point unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11588522B2 (en) * 2016-04-08 2023-02-21 Qualcomm Incorporated Techniques for sparse code multiple access (SCMA) codebook design

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3507971A4 (en) * 2016-09-01 2020-01-22 NBN Co Limited Distribution point unit
AU2017322089B2 (en) * 2016-09-01 2022-07-21 nbn co limited Distribution point unit

Also Published As

Publication number Publication date
CA2505051C (en) 2008-09-09

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20151001