JPS57113639A - Power line carrier transmission system - Google Patents

Power line carrier transmission system

Info

Publication number
JPS57113639A
JPS57113639A JP18856280A JP18856280A JPS57113639A JP S57113639 A JPS57113639 A JP S57113639A JP 18856280 A JP18856280 A JP 18856280A JP 18856280 A JP18856280 A JP 18856280A JP S57113639 A JPS57113639 A JP S57113639A
Authority
JP
Japan
Prior art keywords
control
frequency
power line
filter
transmission system
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
JP18856280A
Other languages
Japanese (ja)
Inventor
Yoichi Isobe
Kazuyoshi Honda
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP18856280A priority Critical patent/JPS57113639A/en
Publication of JPS57113639A publication Critical patent/JPS57113639A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To constitute a high impedance to one carrier signal frequency and a low impedance to another signal frequency, by providing a control range split block filter at both sides of the control range, in a power line carrier transmission system. CONSTITUTION:A commercial power supply is supplied to an indoor power line 2, control areas A1, A2 are provided with a transmitter 1 and a receiver 3, and control range split block filters 51, 52... are provided between the control areas. In the filters 51, 52..., elements Z1, Z2 being high impedance to a frequency f1 of the carrier signal are connected in series and an element Z3 being low impedance to the frequency f1 constitutes a T type filter with the elements. The carrier signal in the frequency f1 for narrow band control used in the control areas A1, A2 is blocked outside the control area A1 or A2 with a control area split block filter 5, no interference is caused at the control areas A1, A2, and the signal is not limited at the filter 5 by using other frequency f2, allowing to use wide area control.
JP18856280A 1980-12-29 1980-12-29 Power line carrier transmission system Pending JPS57113639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18856280A JPS57113639A (en) 1980-12-29 1980-12-29 Power line carrier transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18856280A JPS57113639A (en) 1980-12-29 1980-12-29 Power line carrier transmission system

Publications (1)

Publication Number Publication Date
JPS57113639A true JPS57113639A (en) 1982-07-15

Family

ID=16225855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18856280A Pending JPS57113639A (en) 1980-12-29 1980-12-29 Power line carrier transmission system

Country Status (1)

Country Link
JP (1) JPS57113639A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141673A2 (en) * 1983-11-07 1985-05-15 Emlux Limited Filtering electrical signals
JP2011129480A (en) * 2009-12-21 2011-06-30 Panasonic Electric Works Co Ltd Lighting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141673A2 (en) * 1983-11-07 1985-05-15 Emlux Limited Filtering electrical signals
JP2011129480A (en) * 2009-12-21 2011-06-30 Panasonic Electric Works Co Ltd Lighting system

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