GB2016246A - A device for monitoring the quality of a synchronous digital transmission signal - Google Patents

A device for monitoring the quality of a synchronous digital transmission signal

Info

Publication number
GB2016246A
GB2016246A GB7907681A GB7907681A GB2016246A GB 2016246 A GB2016246 A GB 2016246A GB 7907681 A GB7907681 A GB 7907681A GB 7907681 A GB7907681 A GB 7907681A GB 2016246 A GB2016246 A GB 2016246A
Authority
GB
United Kingdom
Prior art keywords
time interval
circuit
monitoring
quality
transmission signal
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
GB7907681A
Other versions
GB2016246B (en
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
Compagnie Industrielle de Telecommunication CIT Alcatel SA
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 Alcatel CIT SA, Compagnie Industrielle de Telecommunication CIT Alcatel SA filed Critical Alcatel CIT SA
Publication of GB2016246A publication Critical patent/GB2016246A/en
Application granted granted Critical
Publication of GB2016246B publication Critical patent/GB2016246B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions
    • G06G7/1928—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions for forming correlation integrals; for forming convolution integrals
    • G06G7/1935—Arrangements for performing computing operations, e.g. operational amplifiers for forming integrals of products, e.g. Fourier integrals, Laplace integrals, correlation integrals; for analysis or synthesis of functions using orthogonal functions for forming correlation integrals; for forming convolution integrals by converting at least one the input signals into a two level signal, e.g. polarity correlators
    • 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)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

A circuit for monitoring the quality of a digital base band transmission signal having a constant unit time interval, includes a sign coincidence auto- correlator (4,5), which correlates the polarities of two versions of the received signal delayed in relation to each other by (3), an integer multiple of the unit time interval T. The input signal is limited at 2 to provide logic levels 1 or 0 and the combining or correlating device may be an Exclusive OR circuit or a multiplier. The combined output is integrated at 6 with a time constant long compared to the time interval T. The circuit qualitatively measures the differences between a reference time interval and the time interval which separates the consecutive zeros of the input signal and provides an indication analogous to that provided by the eye pattern. <IMAGE>
GB7907681A 1978-03-10 1979-03-05 Device for monitoring the quality of a synchronous digital transmission signal Expired GB2016246B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7806952A FR2419622A1 (en) 1978-03-10 1978-03-10 DEVICE FOR MONITORING THE QUALITY OF A SYNCHRONOUS DIGITAL TRANSMISSION SIGNAL

Publications (2)

Publication Number Publication Date
GB2016246A true GB2016246A (en) 1979-09-19
GB2016246B GB2016246B (en) 1982-03-17

Family

ID=9205620

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7907681A Expired GB2016246B (en) 1978-03-10 1979-03-05 Device for monitoring the quality of a synchronous digital transmission signal

Country Status (10)

Country Link
JP (1) JPS54126407A (en)
BE (1) BE874261A (en)
CA (1) CA1126867A (en)
DE (1) DE2908587A1 (en)
FR (1) FR2419622A1 (en)
GB (1) GB2016246B (en)
IE (1) IE48004B1 (en)
IT (1) IT1118413B (en)
LU (1) LU81021A1 (en)
NL (1) NL7901889A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149803A2 (en) * 1984-01-20 1985-07-31 Siemens Aktiengesellschaft 1 Bit/1 bit digital correlator
WO2004030268A1 (en) * 2002-09-26 2004-04-08 Infineon Technologies Ag Device and method for identifying a useful signal by detecting a periodic signal contained in the useful signal
GB2422989A (en) * 2005-02-03 2006-08-09 Agilent Technologies Inc Correlating a received data signal with a time delayed version of the signal to obtain a measurement of inter-symbol interference
US8594249B2 (en) 2002-09-26 2013-11-26 Intel Mobile Communications GmbH Device and method for detecting a useful signal by detecting a periodic signal contained in the useful signal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL268912A (en) * 1960-09-07
US3995225A (en) * 1975-11-13 1976-11-30 Motorola, Inc. Synchronous, non return to zero bit stream detector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149803A2 (en) * 1984-01-20 1985-07-31 Siemens Aktiengesellschaft 1 Bit/1 bit digital correlator
EP0149803A3 (en) * 1984-01-20 1988-01-20 Siemens Aktiengesellschaft Berlin Und Munchen 1 bit/1 bit digital correlator
WO2004030268A1 (en) * 2002-09-26 2004-04-08 Infineon Technologies Ag Device and method for identifying a useful signal by detecting a periodic signal contained in the useful signal
US8594249B2 (en) 2002-09-26 2013-11-26 Intel Mobile Communications GmbH Device and method for detecting a useful signal by detecting a periodic signal contained in the useful signal
GB2422989A (en) * 2005-02-03 2006-08-09 Agilent Technologies Inc Correlating a received data signal with a time delayed version of the signal to obtain a measurement of inter-symbol interference

Also Published As

Publication number Publication date
DE2908587A1 (en) 1979-09-20
IE48004B1 (en) 1984-08-22
IT7967507A0 (en) 1979-03-09
GB2016246B (en) 1982-03-17
JPS54126407A (en) 1979-10-01
CA1126867A (en) 1982-06-29
BE874261A (en) 1979-08-20
LU81021A1 (en) 1979-10-30
IE790599L (en) 1979-09-10
NL7901889A (en) 1979-09-12
FR2419622B1 (en) 1980-08-22
FR2419622A1 (en) 1979-10-05
IT1118413B (en) 1986-03-03

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19990304