ATE413051T1 - Entscheidungsgeführter trägerfrequenzdetektor und verfahren für qam - Google Patents

Entscheidungsgeführter trägerfrequenzdetektor und verfahren für qam

Info

Publication number
ATE413051T1
ATE413051T1 AT00943368T AT00943368T ATE413051T1 AT E413051 T1 ATE413051 T1 AT E413051T1 AT 00943368 T AT00943368 T AT 00943368T AT 00943368 T AT00943368 T AT 00943368T AT E413051 T1 ATE413051 T1 AT E413051T1
Authority
AT
Austria
Prior art keywords
signal
qam
frequency detector
rotation
baseband signal
Prior art date
Application number
AT00943368T
Other languages
English (en)
Inventor
Richard Bourdeau
Original Assignee
Harris 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 Harris Corp filed Critical Harris Corp
Application granted granted Critical
Publication of ATE413051T1 publication Critical patent/ATE413051T1/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
    • H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset
    • H04L2027/0028—Correction of carrier offset at passband only
    • 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
    • H04L2027/0053—Closed loops
    • H04L2027/0057—Closed loops quadrature phase
    • 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
    • H04L2027/0063—Elements of loops
    • H04L2027/0067—Phase error detectors
AT00943368T 1999-06-01 2000-06-30 Entscheidungsgeführter trägerfrequenzdetektor und verfahren für qam ATE413051T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/323,211 US6738429B1 (en) 1999-06-01 1999-06-01 Decision-directed carrier frequency detector and method for QAM
PCT/US2000/018243 WO2002003643A1 (en) 1999-06-01 2000-06-30 Decsion-directed carrier frequency detector and method for qam

Publications (1)

Publication Number Publication Date
ATE413051T1 true ATE413051T1 (de) 2008-11-15

Family

ID=32852853

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00943368T ATE413051T1 (de) 1999-06-01 2000-06-30 Entscheidungsgeführter trägerfrequenzdetektor und verfahren für qam

Country Status (5)

Country Link
US (1) US6738429B1 (de)
EP (1) EP1297672B1 (de)
AT (1) ATE413051T1 (de)
AU (1) AU2000257845A1 (de)
WO (1) WO2002003643A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10108110A1 (de) * 2001-02-21 2002-08-29 Philips Corp Intellectual Pty Empfänger und Verfahren zum anfänglichen Synchronisieren eines Empfängers auf die Trägerfrequenz eines gewünschten Kanals
GB2377345B (en) * 2001-07-02 2004-06-16 Motorola Inc Time synchronisation system and method
US8654008B2 (en) * 2010-09-29 2014-02-18 Qualcomm Incorporated Multi-stage GLONASS/GPS automatic frequency control
US8644782B2 (en) 2011-11-14 2014-02-04 Apple Inc. Agile clocking with receiver PLL management

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308505A (en) * 1979-06-13 1981-12-29 Trw, Inc. Frequency detector device and method
JPS6155994A (ja) 1984-08-27 1986-03-20 信越化学工業株式会社 銅張りフレキシブルプリント回路用基板
JPS6159949A (ja) * 1984-08-31 1986-03-27 Fujitsu Ltd 選択制御搬送波再生方式
US4682111A (en) 1985-03-05 1987-07-21 Kabushiki Kaisha Toshiba Magnetic resonance imaging magnet
FR2581277A1 (fr) * 1985-04-30 1986-10-31 Labo Electronique Physique Circuit de recuperation de l'onde porteuse de systemes de transmissions numeriques
CA1284361C (en) 1986-08-29 1991-05-21 Mitel Corporation Analog phase locked loop
FR2621188B1 (fr) * 1987-09-25 1989-12-29 Labo Electronique Physique Circuit de recuperation de l'onde porteuse de systemes de transmissions numeriques
US4916405A (en) * 1988-10-27 1990-04-10 Unisys Corp. Smart sweep apparatus for data rate receivers
US5042052A (en) * 1990-02-16 1991-08-20 Harris Corporation Carrier acquisition scheme for QAM and QPSK data
JP2994836B2 (ja) 1992-01-30 1999-12-27 富士通株式会社 復調器のａｆｃ回路
US5376894A (en) * 1992-12-31 1994-12-27 Pacific Communication Sciences, Inc. Phase estimation and synchronization using a PSK demodulator
DE69406151T2 (de) 1993-01-13 1998-04-02 Koninkl Philips Electronics Nv Einrichtung zur Synchronisierung eines lokalen Trägers, in OFDM-Systemen
GB2280324B (en) 1993-07-16 1998-07-22 Plessey Semiconductors Ltd Detectors
JP3074103B2 (ja) * 1993-11-16 2000-08-07 株式会社東芝 Ｏｆｄｍ同期復調回路
US5497400A (en) 1993-12-06 1996-03-05 Motorola, Inc. Decision feedback demodulator with phase and frequency estimation
US5633898A (en) 1993-12-22 1997-05-27 Matsushita Electric Industrial Co., Ltd. Automatic frequency control apparatus for FSK receiver and FSK receiver including the same
KR970000661B1 (ko) 1993-12-29 1997-01-16 현대전자산업 주식회사 위상오차 검출기를 사용한 판정의거 반송파 복원회로
KR0157500B1 (ko) 1994-03-25 1998-11-16 김광호 자동주파수조절방법 및 그 장치
US5519733A (en) * 1994-05-05 1996-05-21 General Instrument Corporation Of Delaware Method and apparatus for recovering a qam carrier
JP3030598B2 (ja) * 1994-06-24 2000-04-10 アンリツ株式会社 ジッタ検出装置
US5696797A (en) 1994-07-22 1997-12-09 Motorola, Inc. Demodulator with baseband doppler shift compensation and method
US5533062A (en) 1994-10-03 1996-07-02 Motorola, Inc. Method and apparatus for carrier tracking and demodulation
EP0719002B1 (de) * 1994-12-22 2004-12-08 Alcatel Prozessor für Trägerrückgewinnung
JP3269933B2 (ja) 1995-03-20 2002-04-02 富士通株式会社 キャリア再生回路
EP0748093A1 (de) * 1995-06-08 1996-12-11 Laboratoires D'electronique Philips S.A.S. Digitales Übertragungssystem mit Entscheidungsmitteln zur Auswahl der Synchronisierungsart
JPH09214578A (ja) * 1996-01-30 1997-08-15 Fujitsu Ltd 搬送波再生回路
US5729577A (en) * 1996-05-21 1998-03-17 Motorola, Inc. Signal processor with improved efficiency
US6055286A (en) 1997-07-01 2000-04-25 Hewlett-Packard Company Oversampling rotational frequency detector
US6160860A (en) * 1998-01-28 2000-12-12 Lucent Technologies Inc. Phase-locked loop (PLL) circuit containing a frequency detector for improved frequency acquisition
EP1127424B1 (de) * 1998-11-03 2004-09-29 Broadcom Corporation Qam/vsb zweimodenempfänger

Also Published As

Publication number Publication date
WO2002003643A1 (en) 2002-01-10
US6738429B1 (en) 2004-05-18
AU2000257845A1 (en) 2002-01-14
EP1297672B1 (de) 2008-10-29
EP1297672A1 (de) 2003-04-02

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Legal Events

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties