AU2001282025A1 - Link quality determination of a transmission link in an ofdm transmission system - Google Patents

Link quality determination of a transmission link in an ofdm transmission system

Info

Publication number
AU2001282025A1
AU2001282025A1 AU2001282025A AU8202501A AU2001282025A1 AU 2001282025 A1 AU2001282025 A1 AU 2001282025A1 AU 2001282025 A AU2001282025 A AU 2001282025A AU 8202501 A AU8202501 A AU 8202501A AU 2001282025 A1 AU2001282025 A1 AU 2001282025A1
Authority
AU
Australia
Prior art keywords
link quality
link
det
determination unit
ofdm
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.)
Abandoned
Application number
AU2001282025A
Inventor
Peter Schramm
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU2001282025A1 publication Critical patent/AU2001282025A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/208—Arrangements for detecting or preventing errors in the information received using signal quality detector involving signal re-encoding
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Small-Scale Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Eye Examination Apparatus (AREA)
  • Stereophonic System (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

The present invention relates to a link quality determination unit (LQ-DET) for determining a link quality (LQ) of a transmission link (TL) between an OFDM transmitter (TR) and an OFDM receiver (RC) of an OFDM transmission system (SYS). A first link quality measure determination unit (Q1-DET) determines a first link quality measure (Q1) on the basis of a signal power variation or a signal-to-noise variation determined by a variation determination unit (VS-DET). A second link quality determination unit (Q2-DET) calculates a second link quality measure (Q2) on the basis of an average signal-to-noise ratio based on the noise power (Pz) and the signal power (Ps). To perform a link adaptation (LA) an overall link quality determination unit (Q-DET) combines the first and second link quality measures (Q1, Q2) into an overall link quality measure (Q). <IMAGE>
AU2001282025A 2000-07-25 2001-07-25 Link quality determination of a transmission link in an ofdm transmission system Abandoned AU2001282025A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP00115037A EP1176750A1 (en) 2000-07-25 2000-07-25 Link quality determination of a transmission link in an OFDM transmission system
EP00115037 2000-07-25
PCT/EP2001/008612 WO2002009343A1 (en) 2000-07-25 2001-07-25 Link quality determination of a transmission link in an ofdm transmission system

Publications (1)

Publication Number Publication Date
AU2001282025A1 true AU2001282025A1 (en) 2002-02-05

Family

ID=8169231

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001282025A Abandoned AU2001282025A1 (en) 2000-07-25 2001-07-25 Link quality determination of a transmission link in an ofdm transmission system

Country Status (8)

Country Link
US (1) US7187646B2 (en)
EP (2) EP1176750A1 (en)
JP (1) JP2004505498A (en)
AT (1) ATE450946T1 (en)
AU (1) AU2001282025A1 (en)
DE (1) DE60140675D1 (en)
ES (1) ES2337336T3 (en)
WO (1) WO2002009343A1 (en)

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EP1303937A1 (en) 2003-04-23
US7187646B2 (en) 2007-03-06
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JP2004505498A (en) 2004-02-19
WO2002009343A1 (en) 2002-01-31
EP1303937B1 (en) 2009-12-02
US20020110138A1 (en) 2002-08-15
EP1176750A1 (en) 2002-01-30
ATE450946T1 (en) 2009-12-15
DE60140675D1 (en) 2010-01-14

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