JPS57107646A - Detecting method for signal quality - Google Patents

Detecting method for signal quality

Info

Publication number
JPS57107646A
JPS57107646A JP18361080A JP18361080A JPS57107646A JP S57107646 A JPS57107646 A JP S57107646A JP 18361080 A JP18361080 A JP 18361080A JP 18361080 A JP18361080 A JP 18361080A JP S57107646 A JPS57107646 A JP S57107646A
Authority
JP
Japan
Prior art keywords
value
difference
signal
reference value
quality
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
JP18361080A
Other languages
Japanese (ja)
Other versions
JPS5854686B2 (en
Inventor
Takashi Kaku
Shigeyuki Umigami
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18361080A priority Critical patent/JPS5854686B2/en
Publication of JPS57107646A publication Critical patent/JPS57107646A/en
Publication of JPS5854686B2 publication Critical patent/JPS5854686B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To allow evaluation even if the distribution of an error signal is not confirmed, by converting the error signal into a scalar value, outputting an integration value, taking the difference with the reference value and obtaining a binary quality evaluation signal, in evaluating the quality of lines of MODEM including an equalizer for a data transmission system. CONSTITUTION:An error signal obtained as the difference between an equalizing output signal of an equalizer and a reference output signal is converted into a scalar value at a scalar value conversion circuit 12 via a multiplication section 11, a control force constant r0 is multiplied by a value which is the difference of the scalar value subtracted from the reference value B0 at an addition section 13, integration is made at an addition section 15 and a feedback gain circuit 16, a control force constant r1 is multiplied at a multiplication section 17, and a difference is taken from a reference value C0 at an addition part 18 to obtain an output C. This is returned to a feedback point 11 and binarized at an addition section 19 with a reference value D0 relating to error rate, allowing to detect the quality of signal.
JP18361080A 1980-12-24 1980-12-24 Signal quality detection method Expired JPS5854686B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18361080A JPS5854686B2 (en) 1980-12-24 1980-12-24 Signal quality detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18361080A JPS5854686B2 (en) 1980-12-24 1980-12-24 Signal quality detection method

Publications (2)

Publication Number Publication Date
JPS57107646A true JPS57107646A (en) 1982-07-05
JPS5854686B2 JPS5854686B2 (en) 1983-12-06

Family

ID=16138802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18361080A Expired JPS5854686B2 (en) 1980-12-24 1980-12-24 Signal quality detection method

Country Status (1)

Country Link
JP (1) JPS5854686B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6487405B1 (en) 1994-09-26 2002-11-26 Adc Telecommunications, Inc. Communication system with multicarrier telephony transport for controlling a plurality of service units
US7114120B2 (en) 2002-07-30 2006-09-26 Fujitsu Limited Data processing apparatus and data processing method
JP2008544709A (en) * 2005-06-27 2008-12-04 インテル・コーポレーション Equalizer mode selection based on symbol error distribution

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6487405B1 (en) 1994-09-26 2002-11-26 Adc Telecommunications, Inc. Communication system with multicarrier telephony transport for controlling a plurality of service units
US7114120B2 (en) 2002-07-30 2006-09-26 Fujitsu Limited Data processing apparatus and data processing method
JP2008544709A (en) * 2005-06-27 2008-12-04 インテル・コーポレーション Equalizer mode selection based on symbol error distribution
JP4922293B2 (en) * 2005-06-27 2012-04-25 インテル・コーポレーション Equalizer mode selection based on symbol error distribution

Also Published As

Publication number Publication date
JPS5854686B2 (en) 1983-12-06

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