CA2403324A1 - Timing recovery circuit in a qam demodulator - Google Patents

Timing recovery circuit in a qam demodulator Download PDF

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Publication number
CA2403324A1
CA2403324A1 CA002403324A CA2403324A CA2403324A1 CA 2403324 A1 CA2403324 A1 CA 2403324A1 CA 002403324 A CA002403324 A CA 002403324A CA 2403324 A CA2403324 A CA 2403324A CA 2403324 A1 CA2403324 A1 CA 2403324A1
Authority
CA
Canada
Prior art keywords
signal
circuit
interpolation
demodulator
recovery circuit
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.)
Abandoned
Application number
CA002403324A
Other languages
English (en)
French (fr)
Inventor
Emmanuel Hamman
Khaled Maalej
Amaury Demol
Yannick Levy
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.)
Atmel Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2403324A1 publication Critical patent/CA2403324A1/en
Abandoned legal-status Critical Current

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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
    • H04L27/3809—Amplitude regulation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • 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
    • H04L27/32—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
    • H04L27/32—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
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3872—Compensation for phase rotation in the demodulated signal
    • 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
    • H04L2027/0032—Correction of carrier offset at baseband and passband
    • 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
    • H04L2027/0036—Correction of carrier offset using a recovered symbol clock
    • 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
    • H04L2027/0038—Correction of carrier offset using an equaliser
    • 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
    • H04L2027/0055—Closed loops single 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
    • H04L2027/0053—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
    • H04L2027/0071—Control of loops
    • 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
    • H04L2027/0079—Switching between loops
    • H04L2027/0081—Switching between loops between loops of different bandwidths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
    • H04L7/002—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation
    • H04L7/0029—Arrangements for synchronising receiver with transmitter correction of synchronization errors correction by interpolation interpolation of received data signal
CA002403324A 2000-04-17 2001-02-12 Timing recovery circuit in a qam demodulator Abandoned CA2403324A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/550,883 US6545532B1 (en) 1999-09-08 2000-04-17 Timing recovery circuit in a QAM demodulator
US09/550,883 2000-04-17
PCT/US2001/040080 WO2002063842A2 (en) 2000-04-17 2001-02-12 Interpolator for timing recovery circuit

Publications (1)

Publication Number Publication Date
CA2403324A1 true CA2403324A1 (en) 2002-08-15

Family

ID=24198958

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002403324A Abandoned CA2403324A1 (en) 2000-04-17 2001-02-12 Timing recovery circuit in a qam demodulator

Country Status (9)

Country Link
US (1) US6545532B1 (US06545532-20030408-M00006.png)
EP (1) EP1338113A2 (US06545532-20030408-M00006.png)
JP (1) JP2004519154A (US06545532-20030408-M00006.png)
CN (1) CN1460341A (US06545532-20030408-M00006.png)
AU (1) AU2001297641A1 (US06545532-20030408-M00006.png)
CA (1) CA2403324A1 (US06545532-20030408-M00006.png)
NO (1) NO20024951D0 (US06545532-20030408-M00006.png)
TW (1) TW578401B (US06545532-20030408-M00006.png)
WO (1) WO2002063842A2 (US06545532-20030408-M00006.png)

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EP1164788A3 (en) * 2000-06-13 2008-10-29 Matsushita Electric Industrial Co., Ltd. Digital broadcast receiving apparatus
ATE426983T1 (de) * 2000-10-05 2009-04-15 Panasonic Corp Digitaler datensender
KR100533606B1 (ko) 2000-10-05 2005-12-05 마쓰시타 덴키 산교 가부시끼 가이샤 링형 네트워크 및 데이터 전송 장치
US7190728B2 (en) * 2000-10-05 2007-03-13 Matsushita Electric Industrial Co., Ltd. Digital data transmitter, transmission line encoding method, and decoding method
WO2002030078A1 (fr) * 2000-10-05 2002-04-11 Matsushita Electric Industrial Co., Ltd. Procede d'initialisation et emetteur de donnees
JP4484355B2 (ja) * 2000-11-22 2010-06-16 富士通マイクロエレクトロニクス株式会社 復調装置、放送システム及び放送受信装置
US7010073B2 (en) * 2001-01-19 2006-03-07 Qualcomm, Incorporated Delay lock loops for wireless communication systems
JP2002247119A (ja) * 2001-02-20 2002-08-30 Advantest Corp シンボル点推定装置、方法、プログラム、および該プログラムを記録した記録媒体ならびに変調解析装置
US20020157058A1 (en) * 2001-02-20 2002-10-24 Cute Ltd. System and method for feedback-based unequal error protection coding
FR2822322A1 (fr) * 2001-03-13 2002-09-20 Koninkl Philips Electronics Nv Modulateur numerique
US6745017B2 (en) * 2001-05-02 2004-06-01 Koninklijke Philips Electronics N.V. Timing recovery switching for an adaptive digital broadband beamforming (antenna diversity) for ATSC terrestrial DTV based on a differentiator
JP3586267B2 (ja) * 2002-06-18 2004-11-10 沖電気工業株式会社 自動利得制御回路
DE60304887T2 (de) * 2002-10-16 2006-08-31 Casio Computer Co., Ltd. Funkwellen Empfangsvorrichtung, Funkwellenuhr, und Repeater
US7738545B2 (en) * 2003-09-30 2010-06-15 Regents Of The University Of Minnesota Pulse shaper design for ultra-wideband communications
EP1862000A2 (en) * 2005-03-24 2007-12-05 Thomson Licensing Non-linear signal distortion detection using multiple signal to noise ratio measurement sources
US7609795B2 (en) * 2005-10-04 2009-10-27 Via Technologies, Inc. Interpolation module, interpolator and methods capable of recovering timing in a timing recovery apparatus
US8381047B2 (en) * 2005-11-30 2013-02-19 Microsoft Corporation Predicting degradation of a communication channel below a threshold based on data transmission errors
US7912694B2 (en) * 2007-01-30 2011-03-22 International Business Machines Corporation Print events in the simulation of a digital system
US8036332B2 (en) 2007-03-30 2011-10-11 4472314 Canada Inc. Communication signal symbol timing error detection and recovery
US8279988B2 (en) * 2007-09-11 2012-10-02 Advanced Receiver Technologies, Llc Efficient channel estimate based timing recovery
US7675443B1 (en) * 2008-06-25 2010-03-09 Atheros Communications, Inc. Saturation detector for an ADC
US8451947B2 (en) * 2008-09-02 2013-05-28 Comtech Ef Data Corp. Burst demodulator
KR20100109107A (ko) * 2009-03-31 2010-10-08 삼성전자주식회사 방송신호수신장치 및 그 제어방법
CN101867539B (zh) * 2010-05-14 2013-05-08 深圳国微技术有限公司 用于有线数字电视的大频偏载波恢复系统及方法
JP2012182594A (ja) * 2011-02-28 2012-09-20 Nec Corp 光送受信システム及び光受信装置
KR20160037656A (ko) * 2014-09-29 2016-04-06 삼성전자주식회사 에러 검출기 및 발진기의 에러 검출 방법
US9137006B1 (en) * 2014-10-22 2015-09-15 The United States Of America As Represented By The Secretary Of The Air Force Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using quadrature and in-phase samples
US9350526B2 (en) * 2014-10-27 2016-05-24 The United States Of America As Represented By The Secretary Of The Air Force Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using in-phase samples
US9319217B1 (en) * 2014-10-28 2016-04-19 The United States Of America As Represented By The Secretary Of The Air Force Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using quadrature-phase samples
US9729119B1 (en) * 2016-03-04 2017-08-08 Atmel Corporation Automatic gain control for received signal strength indication
CN109005428B (zh) * 2018-08-01 2021-10-08 深圳市朗强科技有限公司 图像数据发送、接收方法、电子设备和数据传输系统
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US6160443A (en) * 1999-09-08 2000-12-12 Atmel Corporation Dual automatic gain control in a QAM demodulator

Also Published As

Publication number Publication date
US6545532B1 (en) 2003-04-08
EP1338113A2 (en) 2003-08-27
WO2002063842A2 (en) 2002-08-15
JP2004519154A (ja) 2004-06-24
TW578401B (en) 2004-03-01
WO2002063842A3 (en) 2003-06-05
NO20024951D0 (no) 2002-10-15
AU2001297641A1 (en) 2002-08-19
CN1460341A (zh) 2003-12-03

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Legal Events

Date Code Title Description
FZDE Discontinued