GB1578893A - Carrier correction circuit - Google Patents

Carrier correction circuit Download PDF

Info

Publication number
GB1578893A
GB1578893A GB44370/77A GB4437077A GB1578893A GB 1578893 A GB1578893 A GB 1578893A GB 44370/77 A GB44370/77 A GB 44370/77A GB 4437077 A GB4437077 A GB 4437077A GB 1578893 A GB1578893 A GB 1578893A
Authority
GB
United Kingdom
Prior art keywords
signal
carrier
error signal
recovered carrier
recovered
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.)
Expired
Application number
GB44370/77A
Other languages
English (en)
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of GB1578893A publication Critical patent/GB1578893A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0063—Elements of loops
    • H04L2027/0065—Frequency error detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0044—Control loops for carrier regulation
    • H04L2027/0071—Control of loops
    • H04L2027/0073—Detection of synchronisation state

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
GB44370/77A 1976-12-06 1977-10-25 Carrier correction circuit Expired GB1578893A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/748,028 US4169246A (en) 1976-12-06 1976-12-06 Digital carrier correction circuit

Publications (1)

Publication Number Publication Date
GB1578893A true GB1578893A (en) 1980-11-12

Family

ID=25007674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44370/77A Expired GB1578893A (en) 1976-12-06 1977-10-25 Carrier correction circuit

Country Status (5)

Country Link
US (1) US4169246A (enExample)
DE (1) DE2749736C2 (enExample)
FR (1) FR2373197A1 (enExample)
GB (1) GB1578893A (enExample)
HK (1) HK31881A (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181967A (en) * 1978-07-18 1980-01-01 Motorola, Inc. Digital apparatus approximating multiplication of analog signal by sine wave signal and method
GB2213684A (en) * 1987-12-11 1989-08-16 Philips Electronic Associated Data demodulator baud clock phase locking
US4871974A (en) * 1988-12-23 1989-10-03 International Business Machines, Corp. Coherent phase shift keyed demodulator
DE4221476A1 (de) * 1992-06-30 1994-01-05 Siemens Ag Verfahren und Anordnung zur Regeneration eines Binärsignals
DE4433779C2 (de) * 1994-09-22 1996-07-25 Grundig Emv Phasendetektor für die Steuerung der Rückgewinnung eines Trägersignals
KR19980020286A (ko) * 1996-09-06 1998-06-25 김광호 아날로그 디지탈 변환에 의한 위상검출방법
US6567479B1 (en) * 1998-04-21 2003-05-20 Uniden Financial, Inc. System and method for extracting and compensating for reference frequency error in a communications system
EP1911151B1 (en) * 2005-07-25 2008-12-10 Nxp B.V. Receiver for amplitude-modulated signals
KR100646857B1 (ko) * 2005-11-25 2006-11-23 한국전자통신연구원 룩업 테이블 구성 및 인덱스 검색 방법
US8948313B2 (en) * 2010-01-20 2015-02-03 LG-Erricsson Co., Ltd. Method and apparatus for adjusting a symbol decision threshold at a receiver in a communication network

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185963A (en) * 1960-11-25 1965-05-25 Stelma Inc Synchronizing system having reversible counter means
US3181122A (en) * 1961-10-02 1965-04-27 Electro Mechanical Res Inc Phase code detecting systems having phase-locked loops
US3544717A (en) * 1967-10-18 1970-12-01 Bell Telephone Labor Inc Timing recovery circuit
US3729684A (en) * 1971-07-01 1973-04-24 Sanders Associates Inc Data demodulator employing multiple correlations and filters
US3758870A (en) * 1972-02-23 1973-09-11 Sanders Associates Inc Digital demodulator
US3818346A (en) * 1972-10-12 1974-06-18 J Fletcher Differential phase-shift-keyed signal resolver
US3943285A (en) * 1973-05-10 1976-03-09 Milgo Electronic Corporation Multiplexed data modem
US3883806A (en) * 1974-03-07 1975-05-13 Rockwell International Corp Demodulator circuit for phase modulated communication signals
US3911219A (en) * 1974-03-11 1975-10-07 Bell Telephone Labor Inc Automatic frequency control for differentially coherent phase detection
US3878334A (en) * 1974-04-10 1975-04-15 Gen Dynamics Corp Data synchronizing systems
US3936762A (en) * 1974-06-17 1976-02-03 The Charles Stark Draper Laboratory, Inc. Digital phase-lock loop systems for phase processing of signals
JPS5820181B2 (ja) * 1974-09-25 1983-04-21 日本電気株式会社 タソウイソウドウキフクチヨウソウチ
US4010323A (en) * 1975-10-29 1977-03-01 Bell Telephone Laboratories, Incorporated Digital timing recovery
US4011407A (en) * 1976-02-26 1977-03-08 Rca Corporation Narrow-band eight-phase modem

Also Published As

Publication number Publication date
DE2749736C2 (de) 1985-04-04
FR2373197A1 (fr) 1978-06-30
HK31881A (en) 1981-07-17
FR2373197B1 (enExample) 1984-07-20
DE2749736A1 (de) 1978-06-08
US4169246A (en) 1979-09-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19971024