JPS564943A - Noise removing unit - Google Patents

Noise removing unit

Info

Publication number
JPS564943A
JPS564943A JP8038679A JP8038679A JPS564943A JP S564943 A JPS564943 A JP S564943A JP 8038679 A JP8038679 A JP 8038679A JP 8038679 A JP8038679 A JP 8038679A JP S564943 A JPS564943 A JP S564943A
Authority
JP
Japan
Prior art keywords
signal
circuit
field intensity
received electric
data
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
JP8038679A
Other languages
Japanese (ja)
Inventor
Hiroshi Ikegami
Shunichi Nishimura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8038679A priority Critical patent/JPS564943A/en
Publication of JPS564943A publication Critical patent/JPS564943A/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
    • H04L1/20—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)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To make it possible to remove securely an impulsive noise appearing in a received demodulation output, by delaying data by more than a delay time needed for a decision on a received electric field intensity level. CONSTITUTION:Series PCM signal, output from receiver 9, is supplied to PCM demodulator 11 being delayed by data delay circuit 10 by prescribed time T2. On the other hand, a received electric field intensity signal, detected at 9, is compared to a reference level by level deciding circuit 12 and converted into a possible signal and impossible signal, which are supplied to gate circuit 14 and monostable multivibrator 13. In this constitution, when the time relation is born so that T1<T2< (T1+T2) (providing that T1 is the operation delay time of circuit 12 to a drop in received electric-field intensity and T3 is the output pulse width of multivibrator 13), D/A conversion 15 is not carried out with the signal of circuit 14 in the period when noises are considered to be mixed, and consequently the noise can securely be removed by holding the previous value of data in this period.
JP8038679A 1979-06-26 1979-06-26 Noise removing unit Pending JPS564943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8038679A JPS564943A (en) 1979-06-26 1979-06-26 Noise removing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8038679A JPS564943A (en) 1979-06-26 1979-06-26 Noise removing unit

Publications (1)

Publication Number Publication Date
JPS564943A true JPS564943A (en) 1981-01-19

Family

ID=13716842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8038679A Pending JPS564943A (en) 1979-06-26 1979-06-26 Noise removing unit

Country Status (1)

Country Link
JP (1) JPS564943A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533053A1 (en) * 1982-09-15 1984-03-16 Cit Alcatel Method and device for remote monitoring and remote control of equipment distributed along a digital transmission link via a fibre optic line
JPS59111542A (en) * 1982-12-03 1984-06-27 ハネイウエル・インフオメ−シヨン・システムス・インコ−ポレ−テツド Program counter stack method and nested subroutine and instruction apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533053A1 (en) * 1982-09-15 1984-03-16 Cit Alcatel Method and device for remote monitoring and remote control of equipment distributed along a digital transmission link via a fibre optic line
JPS59111542A (en) * 1982-12-03 1984-06-27 ハネイウエル・インフオメ−シヨン・システムス・インコ−ポレ−テツド Program counter stack method and nested subroutine and instruction apparatus

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