JPS5660133A - Error rate supervisory system - Google Patents

Error rate supervisory system

Info

Publication number
JPS5660133A
JPS5660133A JP13690279A JP13690279A JPS5660133A JP S5660133 A JPS5660133 A JP S5660133A JP 13690279 A JP13690279 A JP 13690279A JP 13690279 A JP13690279 A JP 13690279A JP S5660133 A JPS5660133 A JP S5660133A
Authority
JP
Japan
Prior art keywords
noise
component
noise component
generator
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.)
Pending
Application number
JP13690279A
Other languages
Japanese (ja)
Inventor
Bunichi Miyamoto
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 JP13690279A priority Critical patent/JPS5660133A/en
Publication of JPS5660133A publication Critical patent/JPS5660133A/en
Pending 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
    • H04L1/24—Testing correct operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To eliminate influences of the residual pattern jitters and timing, by converting a noise component proportional to an input noise component into a thermal noise from a different noise generator and then by applying it to a base-band demodulated signal. CONSTITUTION:Noise generator 25 generates a pure white signal of the same frequency band with noise component g'' outputted from filter 18 and AGC amplifier 26 amplifies it. Noise component g'' detected by detectors 23 and 24 and the noise component from generator 25 are supplied to comparator 29 for a level comparison and its error output is negatively fed back to amplifier 26. As a result, noise converting circuit 30 generates a pure white noise output which varies in level with component g''. Then, the output, after being adjusted to a proper level by attenuator 19, is applied as noise component g' to adder 20 and added to demodulated band signal (b) or (c) to obtain a base band signal with the noise component increased. Consequently, component g' never has the residual pattern jitters and timing components such as component g''.
JP13690279A 1979-10-23 1979-10-23 Error rate supervisory system Pending JPS5660133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13690279A JPS5660133A (en) 1979-10-23 1979-10-23 Error rate supervisory system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13690279A JPS5660133A (en) 1979-10-23 1979-10-23 Error rate supervisory system

Publications (1)

Publication Number Publication Date
JPS5660133A true JPS5660133A (en) 1981-05-23

Family

ID=15186232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13690279A Pending JPS5660133A (en) 1979-10-23 1979-10-23 Error rate supervisory system

Country Status (1)

Country Link
JP (1) JPS5660133A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61501063A (en) * 1984-01-11 1986-05-22 テレビツト　コ−ポレイシヨン packetized ensemble modem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61501063A (en) * 1984-01-11 1986-05-22 テレビツト　コ−ポレイシヨン packetized ensemble modem
JPH0455014B2 (en) * 1984-01-11 1992-09-02 Terebitsuto Corp

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