IE790599L - Monitoring of signal quality - Google Patents

Monitoring of signal quality

Info

Publication number
IE790599L
IE790599L IE790599A IE59979A IE790599L IE 790599 L IE790599 L IE 790599L IE 790599 A IE790599 A IE 790599A IE 59979 A IE59979 A IE 59979A IE 790599 L IE790599 L IE 790599L
Authority
IE
Ireland
Prior art keywords
time interval
circuit
monitoring
input signal
unit time
Prior art date
Application number
IE790599A
Other versions
IE48004B1 (en
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Publication of IE790599L publication Critical patent/IE790599L/en
Publication of IE48004B1 publication Critical patent/IE48004B1/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 specially adapted therefor
    • G06G7/19—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or correlation integrals; for analysis or synthesis of functions using orthogonal functions
    • G06G7/1928—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or 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 specially adapted therefor for forming integrals of products, e.g. Fourier integrals, Laplace integrals or 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)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (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> [GB2016246A]
IE599/79A 1978-03-10 1979-08-08 A device for monitoring the quality of a synchronous digital transmission signal IE48004B1 (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
IE790599L true IE790599L (en) 1979-09-10
IE48004B1 IE48004B1 (en) 1984-08-22

Family

ID=9205620

Family Applications (1)

Application Number Title Priority Date Filing Date
IE599/79A IE48004B1 (en) 1978-03-10 1979-08-08 A 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)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401944A1 (en) * 1984-01-20 1985-08-01 Siemens AG, 1000 Berlin und 8000 München 1 BIT / 1 BIT DIGITAL CORRELATOR
DE10245047A1 (en) * 2002-09-26 2004-04-08 Infineon Technologies Ag Device and method for recognizing 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

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

Also Published As

Publication number Publication date
FR2419622B1 (en) 1980-08-22
IE48004B1 (en) 1984-08-22
IT7967507A0 (en) 1979-03-09
GB2016246A (en) 1979-09-19
DE2908587A1 (en) 1979-09-20
BE874261A (en) 1979-08-20
FR2419622A1 (en) 1979-10-05
NL7901889A (en) 1979-09-12
CA1126867A (en) 1982-06-29
JPS54126407A (en) 1979-10-01
LU81021A1 (en) 1979-10-30
GB2016246B (en) 1982-03-17
IT1118413B (en) 1986-03-03

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Legal Events

Date Code Title Description
MM4A Patent lapsed