CA2746702C - Elemination de captage pour systdmes de communication - Google Patents

Elemination de captage pour systdmes de communication Download PDF

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Publication number
CA2746702C
CA2746702C CA2746702A CA2746702A CA2746702C CA 2746702 C CA2746702 C CA 2746702C CA 2746702 A CA2746702 A CA 2746702A CA 2746702 A CA2746702 A CA 2746702A CA 2746702 C CA2746702 C CA 2746702C
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CA
Canada
Prior art keywords
narrow band
iir
communication channel
interferences
notch filters
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.)
Active
Application number
CA2746702A
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English (en)
Other versions
CA2746702A1 (fr
Inventor
Eric R. Pelet
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.)
Vecima Networks Inc
Original Assignee
Vecima Networks 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 Vecima Networks Inc filed Critical Vecima Networks Inc
Priority to CA2746702A priority Critical patent/CA2746702C/fr
Publication of CA2746702A1 publication Critical patent/CA2746702A1/fr
Application granted granted Critical
Publication of CA2746702C publication Critical patent/CA2746702C/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/71—Interference-related aspects the interference being narrowband interference
    • H04B1/7101—Interference-related aspects the interference being narrowband interference with estimation filters
    • 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
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03484—Tapped delay lines time-recursive
    • H04L2025/03503—Tapped delay lines time-recursive as a combination of feedback and prediction filters
    • 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
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03636—Algorithms using least mean square [LMS]
    • 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

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

Une méthode utilisée dans le récepteur dun système de communication est proposée pour supprimer linterférence à bande étroite, connue comme le captage, qui est présente dans le canal de communication, lequel est partagé par une pluralité démetteurs, chacun ayant un pré-égaliseur de canal, au moyen dun schéma daccès multiple par répartition dans le temps (AMRT) ou dun schéma daccès multiple par multiplexage de code synchrone (SCDMA). La méthode comprend le filtrage des interférences à laide de filtres éliminateurs de bande à réponse infinie à une impulsion (IIR) et la fourniture de filtres passe-tout IIR conçus pour compenser sensiblement toutes les distorsions de phase introduites par les filtres éliminateurs de bande. La méthode comprend également un algorithme pour détecter les interférences à bande étroite et un égaliseur adaptatif pour égaliser le canal en calculant les coefficients des pré-égaliseurs des émetteurs, et placés de sorte que légalisation du canal est isolée de la suppression des interférences.
CA2746702A 2011-07-07 2011-07-07 Elemination de captage pour systdmes de communication Active CA2746702C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2746702A CA2746702C (fr) 2011-07-07 2011-07-07 Elemination de captage pour systdmes de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2746702A CA2746702C (fr) 2011-07-07 2011-07-07 Elemination de captage pour systdmes de communication

Publications (2)

Publication Number Publication Date
CA2746702A1 CA2746702A1 (fr) 2013-01-07
CA2746702C true CA2746702C (fr) 2015-09-29

Family

ID=47501798

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2746702A Active CA2746702C (fr) 2011-07-07 2011-07-07 Elemination de captage pour systdmes de communication

Country Status (1)

Country Link
CA (1) CA2746702C (fr)

Also Published As

Publication number Publication date
CA2746702A1 (fr) 2013-01-07

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