JPS6478058A - Carrier recovery circuit - Google Patents

Carrier recovery circuit

Info

Publication number
JPS6478058A
JPS6478058A JP62233655A JP23365587A JPS6478058A JP S6478058 A JPS6478058 A JP S6478058A JP 62233655 A JP62233655 A JP 62233655A JP 23365587 A JP23365587 A JP 23365587A JP S6478058 A JPS6478058 A JP S6478058A
Authority
JP
Japan
Prior art keywords
carrier
phase
flat plane
outside part
pulled
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
JP62233655A
Other languages
Japanese (ja)
Other versions
JP2553103B2 (en
Inventor
Takanori Iwamatsu
Yoshitami Aono
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62233655A priority Critical patent/JP2553103B2/en
Publication of JPS6478058A publication Critical patent/JPS6478058A/en
Application granted granted Critical
Publication of JP2553103B2 publication Critical patent/JP2553103B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To surely establish the synchronization of a recovering carrier in a short time by detecting the rotation of a carrier for only the outside part of the flat plane of a reference phase before the recovering carrier is pulled in the flat plane of the reference phase. CONSTITUTION:A pre-pull-in phase detecting means 3 which divides the flat plane of the reference phase into the outside part and an inside part and can obtain information representing the rotational direction of the phase of the carrier at the outside part based on a demodulation signal is provided. And the output of the pre-pull-in phase detecting means 3 is inputted to a phase synchronization means 2 by a selection means 6 corresponding to the output of an error detecting means 5 when a bit error rate exceeds a prescribed value. Thus, before the carrier is pulled in, the rotational direction of the carrier is detected only for the outside part on the flat plane of the reference phase, and the detection is not performed by the interval of signal points. In such a way, the detection can be performed easily, and a frequency possible to be pulled in is extended, and a pull-in time can be shortened.
JP62233655A 1987-09-19 1987-09-19 Carrier wave regeneration circuit Expired - Fee Related JP2553103B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62233655A JP2553103B2 (en) 1987-09-19 1987-09-19 Carrier wave regeneration circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62233655A JP2553103B2 (en) 1987-09-19 1987-09-19 Carrier wave regeneration circuit

Publications (2)

Publication Number Publication Date
JPS6478058A true JPS6478058A (en) 1989-03-23
JP2553103B2 JP2553103B2 (en) 1996-11-13

Family

ID=16958450

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62233655A Expired - Fee Related JP2553103B2 (en) 1987-09-19 1987-09-19 Carrier wave regeneration circuit

Country Status (1)

Country Link
JP (1) JP2553103B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0832642A (en) * 1994-07-13 1996-02-02 Nec Corp Carrier synchronizing circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048648A (en) * 1983-08-29 1985-03-16 Nippon Telegr & Teleph Corp <Ntt> Carrier regenerating circuit
JPS61225951A (en) * 1985-03-28 1986-10-07 エイ・ティ・アンド・ティ・コーポレーション Carrier recovery circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048648A (en) * 1983-08-29 1985-03-16 Nippon Telegr & Teleph Corp <Ntt> Carrier regenerating circuit
JPS61225951A (en) * 1985-03-28 1986-10-07 エイ・ティ・アンド・ティ・コーポレーション Carrier recovery circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0832642A (en) * 1994-07-13 1996-02-02 Nec Corp Carrier synchronizing circuit

Also Published As

Publication number Publication date
JP2553103B2 (en) 1996-11-13

Similar Documents

Publication Publication Date Title
JPS5580867A (en) Block synchronous signal extracting circuit
US5001728A (en) Method and apparatus for demodulating a biphase signal
JPS52112311A (en) Demodulating circuit
JPS648769A (en) Phase detecting circuit
EP0359573A3 (en) Apparatus for recovering data recorded on a magnetic storagemedium
EP0301616A3 (en) Digital phase-locked-loop clock extractor for bipolar signals
EP0218402A3 (en) A sampling clock phase correction circuit
JPS53118927A (en) Video detecting unit
JPS6425357A (en) Digital data detector
JPS5353918A (en) Detecting method for vertical synchronizing signal and its circuit
JPS52113486A (en) Phase discrimination circuit
JPS5325477A (en) Rotation signal detector
JPS524104A (en) Receiving noise volume detection system
JPS532032A (en) Phase extraction circuit of burst signal
EP0320641A3 (en) Device for automatically selecting the demodulation standard of a video signal, useful with an intermediate frequency demodulator
JPS55134563A (en) Offset qpsk phase difference detector
JPS5327012A (en) Vibration sense level detecting system
SU581565A1 (en) Digital frequency discriminator
JPS5731274A (en) Detecting circuit of noise band phase
JPS53147429A (en) Detection method of time axis error included in reproduced video signal
JPS5356959A (en) False leading-in detection system of carrier regenerator circuit
JPS5687211A (en) Digital demodulating circuit
JPS5528567A (en) Mfm demodulator circuit
JPS53104149A (en) Demodulating system for phase modulation data signal
JPS5637813A (en) Signal demodulation system of magnetic memory unit

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees