JPS5662439A - Erase system for pilot signal - Google Patents

Erase system for pilot signal

Info

Publication number
JPS5662439A
JPS5662439A JP13958479A JP13958479A JPS5662439A JP S5662439 A JPS5662439 A JP S5662439A JP 13958479 A JP13958479 A JP 13958479A JP 13958479 A JP13958479 A JP 13958479A JP S5662439 A JPS5662439 A JP S5662439A
Authority
JP
Japan
Prior art keywords
phase
pilot
erase
signal
wave
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
JP13958479A
Other languages
Japanese (ja)
Inventor
Akio Sabato
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 JP13958479A priority Critical patent/JPS5662439A/en
Publication of JPS5662439A publication Critical patent/JPS5662439A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To avoid erase residual of pilot signal due to phase variance, by the simultaneous control of the amplitude and the phase of erase waveform of the pilot signal so that the identified error of reception signal can be minimized. CONSTITUTION:A reception signal 1 from a signal receiving end 11 is divided into two at a distributor 12, and one is fed to a phase synchronizing circuit 14 via a pilot signal pickup filter 13 to obtain a pilot reference wave 2. The pilot reference wave 2 is fed to a phase device 15 to obtain suitable phase shift which is optimum to erase. The output of the phase shifter 15 is divided into two, one is input to an automatic gain control device 16 and another is input to a correlation device 19. The phase of a pilot erase wave 3 is phase-shifted by 90 deg. at a phase shifter 21, and the correlativity with an identification error information 4 is taken at a correlation device and the phase of the pilot reference wave 2 is controlled with the result of correlation. The inserted pilot is eliminated, by adding the pilot erase wave 3 with the reception signal from a hybrid circuit 12 at a coupler 17.
JP13958479A 1979-10-29 1979-10-29 Erase system for pilot signal Pending JPS5662439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13958479A JPS5662439A (en) 1979-10-29 1979-10-29 Erase system for pilot signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13958479A JPS5662439A (en) 1979-10-29 1979-10-29 Erase system for pilot signal

Publications (1)

Publication Number Publication Date
JPS5662439A true JPS5662439A (en) 1981-05-28

Family

ID=15248657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13958479A Pending JPS5662439A (en) 1979-10-29 1979-10-29 Erase system for pilot signal

Country Status (1)

Country Link
JP (1) JPS5662439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102594442A (en) * 2012-02-27 2012-07-18 中兴通讯股份有限公司 Erasing and regenerating method and device for wavelength tags

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102594442A (en) * 2012-02-27 2012-07-18 中兴通讯股份有限公司 Erasing and regenerating method and device for wavelength tags

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