JPS562758A - Automatic correcting system for fm signal transmission distortion - Google Patents

Automatic correcting system for fm signal transmission distortion

Info

Publication number
JPS562758A
JPS562758A JP7880479A JP7880479A JPS562758A JP S562758 A JPS562758 A JP S562758A JP 7880479 A JP7880479 A JP 7880479A JP 7880479 A JP7880479 A JP 7880479A JP S562758 A JPS562758 A JP S562758A
Authority
JP
Japan
Prior art keywords
signal
output
pilot
higher harmonic
cubed
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
JP7880479A
Other languages
Japanese (ja)
Inventor
Kazuo Kawai
Hidetaka Yanagidaira
Michitoshi Tamori
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP7880479A priority Critical patent/JPS562758A/en
Publication of JPS562758A publication Critical patent/JPS562758A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To correct transmission distortion effectively with a simple constitution, by extracting a pilot signal and its higher harmonic in the base band signal of the demodulation output and by performing a required operation processing so that this higher harmonic may be eliminated. CONSTITUTION:The signal from demodulation base band signal input terminal 1 is squared and cubed by multipliers 2 and 3 respectively, and the original signal and signals squared and cubed are applied to adder 17 through phase shifters 4, 5 and 7 and nultipliers 9 and 11, and further, respective outputs squared and cubed are applied to adder 17 through phase shifters 6 and 8, which have difference pi/2 of the phase shift quantity for phase shifters 5 and 7, and multipliers 10 and 12. The output of this adder 17 is used as a distortion correction output, and the pilot signal in the correction output is applied to pilot extracting filter 19 and the second and the third higher harmonic extracting filters 20 and 21 for pilot, and higher- degree higher harmonic components included in the correction signal output corresponding to respective degrees are subjected to phase detection in phase detectors 28-31, and inputs or outputs of multipliers 9-12 are controlled, thus correcting transmission distortion effectively.
JP7880479A 1979-06-21 1979-06-21 Automatic correcting system for fm signal transmission distortion Pending JPS562758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7880479A JPS562758A (en) 1979-06-21 1979-06-21 Automatic correcting system for fm signal transmission distortion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7880479A JPS562758A (en) 1979-06-21 1979-06-21 Automatic correcting system for fm signal transmission distortion

Publications (1)

Publication Number Publication Date
JPS562758A true JPS562758A (en) 1981-01-13

Family

ID=13672031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7880479A Pending JPS562758A (en) 1979-06-21 1979-06-21 Automatic correcting system for fm signal transmission distortion

Country Status (1)

Country Link
JP (1) JPS562758A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53104693U (en) * 1977-01-27 1978-08-23
JPS53104695U (en) * 1977-01-27 1978-08-23
JPS53157056U (en) * 1977-05-12 1978-12-09

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53104693U (en) * 1977-01-27 1978-08-23
JPS53104695U (en) * 1977-01-27 1978-08-23
JPS53157056U (en) * 1977-05-12 1978-12-09

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