JPS5728435A - Method and apparatus for signal reception and demodulation - Google Patents

Method and apparatus for signal reception and demodulation

Info

Publication number
JPS5728435A
JPS5728435A JP10249780A JP10249780A JPS5728435A JP S5728435 A JPS5728435 A JP S5728435A JP 10249780 A JP10249780 A JP 10249780A JP 10249780 A JP10249780 A JP 10249780A JP S5728435 A JPS5728435 A JP S5728435A
Authority
JP
Japan
Prior art keywords
circuit
output
sin
phase
zero phase
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
JP10249780A
Other languages
Japanese (ja)
Other versions
JPH0237735B2 (en
Inventor
Atsuhiro Yoshizaki
Eizaburo Sakawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10249780A priority Critical patent/JPH0237735B2/en
Publication of JPS5728435A publication Critical patent/JPS5728435A/en
Publication of JPH0237735B2 publication Critical patent/JPH0237735B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source

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 enable reception with S/N, by subtracting a stationary error component when no signal is transmitted from a reception signal. CONSTITUTION:A multiplication circuit 22 multiplies a phase voltage Va phase- shifted by 90 deg. at a 90 deg.-advance phase-shifting circuit 20 with an output I0 of a zero phase CT, and a multiplication circuit 23 multiplies the phase voltage Va with the output I0 of the zero phase CT phase-shifted by 90 deg. at a 90 deg. lagging circuit 21. An adder 24 adds the output of the multiplication circuits 22, 23 and applies the result to a subtraction circuit 26 and a holding circuit 25. A reception signal is obtained from the circuit 26. In this case, the zero phase voltage is expressed as Va sin(omegat), the signal component of the zero phase current I0 is as Is sin(omegat+90 deg.), and stationary error of the zero phase current I0 is as Ie sin(omegat+phi). Thus, since the output of the adder 24 is (VaXIs+VaXIe sin phi), the output of the circuit 26 is only the signal component VaXI0, by storing the output Va sin phi of the adder 24 immediately before the reception to the holding circuit 25.
JP10249780A 1980-07-28 1980-07-28 SHINGODENSOHOHOOYOBISOCHI Expired - Lifetime JPH0237735B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10249780A JPH0237735B2 (en) 1980-07-28 1980-07-28 SHINGODENSOHOHOOYOBISOCHI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10249780A JPH0237735B2 (en) 1980-07-28 1980-07-28 SHINGODENSOHOHOOYOBISOCHI

Publications (2)

Publication Number Publication Date
JPS5728435A true JPS5728435A (en) 1982-02-16
JPH0237735B2 JPH0237735B2 (en) 1990-08-27

Family

ID=14329042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10249780A Expired - Lifetime JPH0237735B2 (en) 1980-07-28 1980-07-28 SHINGODENSOHOHOOYOBISOCHI

Country Status (1)

Country Link
JP (1) JPH0237735B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62171237A (en) * 1986-01-24 1987-07-28 Hitachi Ltd Power line carrier signal transmission equipment
JPS62171236A (en) * 1986-01-24 1987-07-28 Hitachi Ltd Power line carrier transmission equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62171237A (en) * 1986-01-24 1987-07-28 Hitachi Ltd Power line carrier signal transmission equipment
JPS62171236A (en) * 1986-01-24 1987-07-28 Hitachi Ltd Power line carrier transmission equipment
JPH0553326B2 (en) * 1986-01-24 1993-08-09 Hitachi Ltd

Also Published As

Publication number Publication date
JPH0237735B2 (en) 1990-08-27

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