AR016149A1 - Metodo y aparato para estimar un desplazamiento de frecuencia entre una frecuencia portadora del transmisor y una referencia de frecuencia local del receptor en una red de comunicacion que incluye por lo menos un transmisor y por lo menos un receptor - Google Patents

Metodo y aparato para estimar un desplazamiento de frecuencia entre una frecuencia portadora del transmisor y una referencia de frecuencia local del receptor en una red de comunicacion que incluye por lo menos un transmisor y por lo menos un receptor

Info

Publication number
AR016149A1
AR016149A1 ARP980105677A ARP980105677A AR016149A1 AR 016149 A1 AR016149 A1 AR 016149A1 AR P980105677 A ARP980105677 A AR P980105677A AR P980105677 A ARP980105677 A AR P980105677A AR 016149 A1 AR016149 A1 AR 016149A1
Authority
AR
Argentina
Prior art keywords
transmitter
receiver
phase differences
frequency
accumulated
Prior art date
Application number
ARP980105677A
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of AR016149A1 publication Critical patent/AR016149A1/es

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
    • H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

En un sistema de comunicaciones que incluye por lo menos un transmisor y por lo menos un receptor, se estima un desplazamiento de frecuencia entre unafrecuencia portadora del transmisor y una referencia de frecuencia local del receptor. Se computaun a diferencia de fase entre las muestras recogidassucesivamente de una senal de sincronizacion de frecuencia transmitida por el transmisor y detectada por el receptor. La diferencia de fase se suma a lasdiferencias de fase acumuladas, lasdiferencias de fase de las muestras recogida sucesivamente se computan y asuman a las diferencias de fase acumuladas hastahaber sumado M diferencias de fase acumuladas. La suma de las M diferencias de fase acumuladas se vacía, dando como resultadocero diferenc ias de faseacumuladas. Las diferencias de fase de las muestras recogidas sucesivamente se computan, las diferencias de fase se suman a las diferencias de fase acumuladasy la suma de las M diferencias de fase acumuladas se vacía hastahaber vaciado N sumas de M diferencias de fase acumuladas. Las N sumas de las M diferencia defase acumuladas se suman para producir el desplazamiento de frecuencia estimado.
ARP980105677A 1997-11-17 1998-11-10 Metodo y aparato para estimar un desplazamiento de frecuencia entre una frecuencia portadora del transmisor y una referencia de frecuencia local del receptor en una red de comunicacion que incluye por lo menos un transmisor y por lo menos un receptor AR016149A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/971,666 US6104767A (en) 1997-11-17 1997-11-17 Method and apparatus for estimating a frequency offset

Publications (1)

Publication Number Publication Date
AR016149A1 true AR016149A1 (es) 2001-06-20

Family

ID=25518677

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP980105677A AR016149A1 (es) 1997-11-17 1998-11-10 Metodo y aparato para estimar un desplazamiento de frecuencia entre una frecuencia portadora del transmisor y una referencia de frecuencia local del receptor en una red de comunicacion que incluye por lo menos un transmisor y por lo menos un receptor

Country Status (16)

Country Link
US (1) US6104767A (es)
EP (1) EP1032975B1 (es)
JP (1) JP4016373B2 (es)
KR (1) KR100567699B1 (es)
CN (1) CN1120571C (es)
AR (1) AR016149A1 (es)
AT (1) ATE266276T1 (es)
AU (1) AU749532B2 (es)
BR (1) BR9814875A (es)
DE (1) DE69823693T2 (es)
EE (1) EE200000295A (es)
HK (1) HK1029232A1 (es)
IL (1) IL136173A (es)
MY (1) MY114973A (es)
PL (1) PL340496A1 (es)
WO (1) WO1999026338A1 (es)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3462175B2 (ja) * 1997-09-30 2003-11-05 シーメンス アクチエンゲゼルシヤフト パイロットトーンをサーチする方法
FI105629B (fi) * 1997-12-22 2000-09-15 Nokia Networks Oy Menetelmä taajuusvirheen estimointiin
FR2782222B1 (fr) * 1998-08-06 2002-05-17 Alsthom Cge Alkatel Estimation du decalage en frequence pour la demodulation d'un paquet de symboles modules en phase
DE19854167C2 (de) * 1998-11-24 2000-09-28 Siemens Ag Frequenzstabilisierte Sende-/Empfangsschaltung
US6587695B1 (en) * 1999-10-27 2003-07-01 Nokia Mobile Phones Limited Method and apparatus for distinguishing a compact control channel from a classic control channel
AU7397501A (en) * 2000-05-05 2001-11-20 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus to estimate frequency offset in a receiver
US7047435B2 (en) * 2000-12-19 2006-05-16 Siemens Corporate Research, Inc. System and method for clock-synchronization in distributed systems
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
GB2375272B (en) * 2001-04-30 2003-11-19 Lucent Technologies Inc A frequency estimator for use in a receiver of packetised data, the receiver and a method of reception
JP2005509372A (ja) * 2001-11-06 2005-04-07 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ 位相アンラッピングを用いたｄａｔ支援型周波数オフセット検出
US6861900B2 (en) * 2001-12-27 2005-03-01 Proxim Corporation Fast timing acquisition for multiple radio terminals
GB2394628B (en) * 2002-10-25 2005-10-19 Siemens Plc A method of determining a timing offset between a first clock and a second clock in a communications network
US7203254B2 (en) * 2003-03-25 2007-04-10 Motorola, Inc. Method and system for synchronizing in a frequency shift keying receiver
JP4555287B2 (ja) * 2003-06-25 2010-09-29 エヌエックスピー ビー ヴィ 狭帯域干渉信号を相殺する方法
US20050129149A1 (en) * 2003-12-12 2005-06-16 Kuntz Thomas L. Detecting GSM downlink signal frequency correction burst
US20050238060A1 (en) * 2004-04-23 2005-10-27 Kuntz Thomas L Synchronizing to GSM RF downlink signal frame timing
CN1707980B (zh) * 2004-06-11 2010-12-08 联芯科技有限公司 收发信机与仪器之间信号同步的方法及系统
KR100665100B1 (ko) * 2004-11-18 2007-01-04 한국전자통신연구원 디지털 초협대역 단말기용 주파수 옵셋 자동 보상 장치 및그 방법과 그를 이용한 수신 시스템
JP4621046B2 (ja) * 2005-03-25 2011-01-26 日本無線株式会社 周波数誤差検出装置および受信装置
US20070058752A1 (en) * 2005-07-29 2007-03-15 Faraday Technology Corp. Methods and systems for estimating sampling frequency offset of OFDM symbols
CN1968234B (zh) * 2005-11-15 2010-11-10 凌阳科技股份有限公司 频率偏移测算电路及方法
KR100653181B1 (ko) 2005-12-07 2006-12-05 한국전자통신연구원 주파수 옵셋 보상 기능을 가지는 넌­코히런트 동기직접변환 수신 장치
KR100723528B1 (ko) * 2006-04-21 2007-05-30 삼성전자주식회사 옵셋 주파수 추정 방법 및 장치
CN101267417B (zh) * 2007-03-14 2011-10-05 卓胜微电子（上海）有限公司 数字通信系统整数频偏的估计方法
US8345804B2 (en) * 2007-06-14 2013-01-01 Alcatel Lucent Simplified RACH preamble detection receiver
KR101339424B1 (ko) * 2007-07-16 2013-12-09 삼성전자주식회사 샘플링 주파수 오프셋 추정 방법, 샘플링 주파수 오프셋추정 장치 및 그 장치를 구비하는 샘플링 타이밍 복원 루프
JP4588061B2 (ja) * 2007-09-28 2010-11-24 シャープ株式会社 デジタル復調装置、その制御方法、プログラム、そのプログラムを記録した記録媒体、及び、デジタル受信装置
CN101553028B (zh) * 2009-04-30 2011-06-15 西南交通大学 Td-scdma通信系统接收同步中基于差分相位的频偏与相位估计方法
KR101306552B1 (ko) * 2009-12-17 2013-09-09 한국전자통신연구원 이차 미분 위상 벡터를 이용한 심볼 추정 장치 및 방법
CN101820298B (zh) * 2010-01-11 2014-04-30 华为技术有限公司 利用频偏的通信方法、装置以及基站和基站控制设备
CN104009952B (zh) * 2013-02-22 2018-01-02 中国科学院深圳先进技术研究院 一种降低窄带频移键控解调误码率的方法
US9712316B2 (en) * 2013-02-27 2017-07-18 Panasonic Corporation Reception apparatus, phase error estimation method, and phase error correction method
US9037092B2 (en) * 2013-09-30 2015-05-19 Broadcom Corporation Method, apparatus and computer program for determining whether a received signal comprises a first signal component
US9614558B2 (en) * 2015-03-26 2017-04-04 Vt Idirect, Inc. Apparatus and method for phase unwrapping of a burst signal
CN108768909B (zh) * 2018-06-15 2021-11-26 中国电子科技集团公司第四十一研究所 一种基于最小方差的2fsk符号同步方法和系统
EP3591851A1 (en) * 2018-07-02 2020-01-08 Semtech Corporation Relative frequency hops in low-power, wide-area network
CN109633709B (zh) * 2018-12-28 2020-05-15 四川安迪科技实业有限公司 一种卫星通信系统中实用高效的频偏估计方法

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447910A (en) * 1981-06-02 1984-05-08 Harris Corporation Phase tracking correction scheme for high frequency modem
US4661769A (en) * 1985-01-23 1987-04-28 North Carolina State University Measurement of magnitude and phase angle of voltage and current phasors and frequency deviation in power systems
DE3700457C1 (de) * 1987-01-09 1988-06-23 Ant Nachrichtentech Verfahren und Anordnung zur Synchronisation eines Empfaengers bei digitalen UEbertragungssystemen
US4849991A (en) * 1988-06-29 1989-07-18 Bell Communications Research, Inc. Method and circuitry for determining symbol timing for time division multiple access radio systems
US4983906A (en) * 1989-08-17 1991-01-08 Hewlett-Packard Company Frequency estimation system
US4941155A (en) * 1989-11-16 1990-07-10 Bell Communications Research, Inc. Method and circuitry for symbol timing and frequency offset estimation in time division multiple access radio systems
FR2661792A1 (fr) * 1990-05-04 1991-11-08 Alcatel Radiotelephone Dispositif d'evaluation d'ecart de frequence.
EP0455893B1 (en) * 1990-05-11 1995-02-01 Alcatel N.V. Telecommunication line circuit
US5303269A (en) * 1990-11-01 1994-04-12 Chirp Corporation Optically maximum A posteriori demodulator
US5299235A (en) * 1991-09-10 1994-03-29 Telefonaktiebolaget L M Ericsson Time synchronization of a receiver in a digital radio telephone system
EP0546614B1 (de) * 1991-12-07 1997-05-07 Philips Patentverwaltung GmbH Mobilfunkempfänger dessen verbesserte Anfangssysnchronisation mit einer Feststation durch Frequenzschätzung mittels Impulserkennung erreicht wird
US5295153A (en) * 1992-04-13 1994-03-15 Telefonaktiebolaget L M Ericsson CDMA frequency allocation
US5588026A (en) * 1992-06-04 1996-12-24 Kokusai Denshin Denwa Co., Ltd. Method of compensating phase shift keying frequency offset
JP2773562B2 (ja) * 1992-07-28 1998-07-09 日本電気株式会社 信号系列検出方法
KR950004878B1 (ko) * 1992-12-29 1995-05-15 재단법인 한국전자통신연구소 미세 주파수 편이 검출방법
JP3214159B2 (ja) * 1993-01-22 2001-10-02 三菱電機株式会社 キャリア検出器
US5590158A (en) * 1993-01-28 1996-12-31 Advantest Corporation Method and apparatus for estimating PSK modulated signals
US5315307A (en) * 1993-06-18 1994-05-24 The United States Of America As Represented By The Secretary Of The Air Force Doppler frequency angle measurement technique
US5425058A (en) * 1993-07-28 1995-06-13 Martin Marietta Corporation MSK phase acquisition and tracking method
JP2643792B2 (ja) * 1993-09-14 1997-08-20 日本電気株式会社 復調装置
US5473637A (en) * 1993-10-05 1995-12-05 Pacific Communication Sciences, Inc. Open-loop phase estimation methods and apparatus for coherent demodulation of phase modulated carriers in mobile channels
US5504786A (en) * 1993-10-05 1996-04-02 Pacific Communication Sciences, Inc. Open loop phase estimation methods and apparatus for coherent combining of signals using spatially diverse antennas in mobile channels
US5497400A (en) * 1993-12-06 1996-03-05 Motorola, Inc. Decision feedback demodulator with phase and frequency estimation
US5519625A (en) * 1994-02-16 1996-05-21 Hewlett-Packard Company System for characterizing phase-modulated signals using a time interval analyzer
KR0157500B1 (ko) * 1994-03-25 1998-11-16 김광호 자동주파수조절방법 및 그 장치
FI96257C (fi) * 1994-04-13 1996-05-27 Nokia Telecommunications Oy Menetelmä radiotaajuisen signaalin vaihevirheen määrittämiseksi, sekä vastaanotin
JP2659060B2 (ja) * 1994-07-06 1997-09-30 日本電気株式会社 周波数誤差検出方法
US5519399A (en) * 1994-12-05 1996-05-21 Alliedsignal Inc. Method for measuring the frequency of continuous wave and wide pulse RF signals
SE504787C2 (sv) * 1994-12-14 1997-04-28 Hd Divine Ab Metod vid OFDM-mottagning för korrigering av frekvens, tidsfönster, samplingsklocka och långsamma fasvariationer

Also Published As

Publication number Publication date
JP4016373B2 (ja) 2007-12-05
US6104767A (en) 2000-08-15
CN1286825A (zh) 2001-03-07
EP1032975A1 (en) 2000-09-06
EP1032975B1 (en) 2004-05-06
KR20010032165A (ko) 2001-04-16
IL136173A (en) 2004-05-12
BR9814875A (pt) 2000-10-03
EE200000295A (et) 2001-06-15
AU749532B2 (en) 2002-06-27
HK1029232A1 (en) 2001-03-23
IL136173A0 (en) 2001-05-20
CN1120571C (zh) 2003-09-03
WO1999026338A1 (en) 1999-05-27
PL340496A1 (en) 2001-02-12
MY114973A (en) 2003-02-28
KR100567699B1 (ko) 2006-04-05
DE69823693D1 (de) 2004-06-09
JP2001523909A (ja) 2001-11-27
ATE266276T1 (de) 2004-05-15
WO1999026338B1 (en) 1999-06-24
DE69823693T2 (de) 2004-10-21
AU1267599A (en) 1999-06-07

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