GB2348092B - Adapative step size for filter and method therefor - Google Patents

Adapative step size for filter and method therefor

Info

Publication number
GB2348092B
GB2348092B GB0000688A GB0000688A GB2348092B GB 2348092 B GB2348092 B GB 2348092B GB 0000688 A GB0000688 A GB 0000688A GB 0000688 A GB0000688 A GB 0000688A GB 2348092 B GB2348092 B GB 2348092B
Authority
GB
United Kingdom
Prior art keywords
adapative
filter
step size
method therefor
therefor
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.)
Expired - Fee Related
Application number
GB0000688A
Other versions
GB0000688D0 (en
GB2348092A (en
Inventor
Tom Hong Li
Michael Mclaughlin
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of GB0000688D0 publication Critical patent/GB0000688D0/en
Publication of GB2348092A publication Critical patent/GB2348092A/en
Application granted granted Critical
Publication of GB2348092B publication Critical patent/GB2348092B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H2021/007—Computation saving measures; Accelerating measures
    • H03H2021/0076—Measures relating to the convergence time
    • H03H2021/0078—Measures relating to the convergence time varying the step size

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB0000688A 1999-01-12 2000-01-12 Adapative step size for filter and method therefor Expired - Fee Related GB2348092B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22819899A 1999-01-12 1999-01-12

Publications (3)

Publication Number Publication Date
GB0000688D0 GB0000688D0 (en) 2000-03-08
GB2348092A GB2348092A (en) 2000-09-20
GB2348092B true GB2348092B (en) 2001-04-18

Family

ID=22856208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0000688A Expired - Fee Related GB2348092B (en) 1999-01-12 2000-01-12 Adapative step size for filter and method therefor

Country Status (1)

Country Link
GB (1) GB2348092B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2379369B (en) 2001-08-29 2005-06-29 Zarlink Semiconductor Inc Subband echo location and double-talk detection in communication systems
CN113194385B (en) * 2021-01-14 2023-03-10 四川湖山电器股份有限公司 Subband self-adaptive feedback elimination method and system based on step size control

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264600A (en) * 1991-06-28 1993-09-01 Motorola Inc A method for optimizing an adaptive filter update coefficient
US5272695A (en) * 1990-09-14 1993-12-21 Nippon Telegraph And Telephone Corporation Subband echo canceller with adjustable coefficients using a series of step sizes
US5455819A (en) * 1993-03-05 1995-10-03 Nec Corporation Method and apparatus capable of quickly identifying an unknown system even on occurrence of a plurality of dispersive portions
JPH09148965A (en) * 1995-11-22 1997-06-06 Nec Corp Echo canceller for sounds
EP0884844A2 (en) * 1997-06-11 1998-12-16 Nec Corporation Adaptive filter, step size control method thereof, and record medium therefor
US5872728A (en) * 1996-06-20 1999-02-16 International Business Machines Corporation Process for computing the coefficients of an adaptive filter in an echo-cancellor
JPH11313014A (en) * 1998-04-27 1999-11-09 Mitsubishi Electric Corp Band divided echo canceler

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5272695A (en) * 1990-09-14 1993-12-21 Nippon Telegraph And Telephone Corporation Subband echo canceller with adjustable coefficients using a series of step sizes
GB2264600A (en) * 1991-06-28 1993-09-01 Motorola Inc A method for optimizing an adaptive filter update coefficient
US5455819A (en) * 1993-03-05 1995-10-03 Nec Corporation Method and apparatus capable of quickly identifying an unknown system even on occurrence of a plurality of dispersive portions
JPH09148965A (en) * 1995-11-22 1997-06-06 Nec Corp Echo canceller for sounds
US5872728A (en) * 1996-06-20 1999-02-16 International Business Machines Corporation Process for computing the coefficients of an adaptive filter in an echo-cancellor
EP0884844A2 (en) * 1997-06-11 1998-12-16 Nec Corporation Adaptive filter, step size control method thereof, and record medium therefor
JPH11313014A (en) * 1998-04-27 1999-11-09 Mitsubishi Electric Corp Band divided echo canceler

Also Published As

Publication number Publication date
GB0000688D0 (en) 2000-03-08
GB2348092A (en) 2000-09-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070112