JPS57159176A - Comensation system against phase modulation distortion - Google Patents

Comensation system against phase modulation distortion

Info

Publication number
JPS57159176A
JPS57159176A JP56043928A JP4392881A JPS57159176A JP S57159176 A JPS57159176 A JP S57159176A JP 56043928 A JP56043928 A JP 56043928A JP 4392881 A JP4392881 A JP 4392881A JP S57159176 A JPS57159176 A JP S57159176A
Authority
JP
Japan
Prior art keywords
phase
modulation distortion
phase modulation
locked loop
audio
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
JP56043928A
Other languages
Japanese (ja)
Other versions
JPS609394B2 (en
Inventor
Kenji Koro
Yasuki Ozaki
Takashi Maruyama
Tadao Nagatsuma
Norio Shimano
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.)
Oki Electric Industry Co Ltd
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Oki Electric Industry Co Ltd
Japan Broadcasting Corp
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 Nippon Hoso Kyokai NHK, Oki Electric Industry Co Ltd, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP56043928A priority Critical patent/JPS609394B2/en
Publication of JPS57159176A publication Critical patent/JPS57159176A/en
Publication of JPS609394B2 publication Critical patent/JPS609394B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/01—Reducing phase shift

Landscapes

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

Abstract

PURPOSE:To obtain a compensator resistive to the change in operation state, by compensating a phase modulation distortion due to an AM-PM conversion with a feedback loop. CONSTITUTION:After phases of two audio signals selected at audio carriers BPFs 14 and 15are matched with the loop of the 1st phase locked loop consisting of an audio carrier BPF 15, a phase detector 16, a local oscillator 17 and a mixer 18, a part of outputs of the phase detector 16 is amplified through an amplifier 19 with the 2nd phase locked loop consisting of an audio carrier wave BPF 14 including the 1st phase locked loop, a transmission conversion section 10, a transmission converting local oscillator 11 and a power amplifier 12, and this component is applied to a phase shifter 6, allowing to automatically correct the phase modulation distortion at an output terminal 13, that is, the distortion due to AM-PM conversion caused at the transmission conversion section 10 and the power amplifying section 12.
JP56043928A 1981-03-27 1981-03-27 Phase modulation distortion correction method Expired JPS609394B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56043928A JPS609394B2 (en) 1981-03-27 1981-03-27 Phase modulation distortion correction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56043928A JPS609394B2 (en) 1981-03-27 1981-03-27 Phase modulation distortion correction method

Publications (2)

Publication Number Publication Date
JPS57159176A true JPS57159176A (en) 1982-10-01
JPS609394B2 JPS609394B2 (en) 1985-03-09

Family

ID=12677350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56043928A Expired JPS609394B2 (en) 1981-03-27 1981-03-27 Phase modulation distortion correction method

Country Status (1)

Country Link
JP (1) JPS609394B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4929906A (en) * 1989-01-23 1990-05-29 The Boeing Company Amplifier linearization using down/up conversion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4929906A (en) * 1989-01-23 1990-05-29 The Boeing Company Amplifier linearization using down/up conversion

Also Published As

Publication number Publication date
JPS609394B2 (en) 1985-03-09

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