DE60028983D1 - Doppelte automatische verstärkungsregelung in einem qam-demodulator - Google Patents

Doppelte automatische verstärkungsregelung in einem qam-demodulator

Info

Publication number
DE60028983D1
DE60028983D1 DE60028983T DE60028983T DE60028983D1 DE 60028983 D1 DE60028983 D1 DE 60028983D1 DE 60028983 T DE60028983 T DE 60028983T DE 60028983 T DE60028983 T DE 60028983T DE 60028983 D1 DE60028983 D1 DE 60028983D1
Authority
DE
Germany
Prior art keywords
gain control
automatic gain
qam demodulator
double automatic
double
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 - Fee Related
Application number
DE60028983T
Other languages
English (en)
Other versions
DE60028983T2 (de
Inventor
Khaled Maalej
Emmanuel Hamman
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
Atmel 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 Atmel Corp filed Critical Atmel Corp
Publication of DE60028983D1 publication Critical patent/DE60028983D1/de
Application granted granted Critical
Publication of DE60028983T2 publication Critical patent/DE60028983T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04L27/32—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
    • 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
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
    • H04L7/0058—Detection of the synchronisation error by features other than the received signal transition detection of error based on equalizer tap values
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE60028983T 1999-09-08 2000-07-11 Doppelte automatische verstärkungsregelung in einem qam-demodulator Expired - Fee Related DE60028983T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US396555 1989-08-21
US09/396,555 US6160443A (en) 1999-09-08 1999-09-08 Dual automatic gain control in a QAM demodulator
PCT/US2000/040355 WO2001019048A1 (en) 1999-09-08 2000-07-11 Dual automatic gain control in a qam demodulator

Publications (2)

Publication Number Publication Date
DE60028983D1 true DE60028983D1 (de) 2006-08-03
DE60028983T2 DE60028983T2 (de) 2007-01-04

Family

ID=23567701

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60028983T Expired - Fee Related DE60028983T2 (de) 1999-09-08 2000-07-11 Doppelte automatische verstärkungsregelung in einem qam-demodulator

Country Status (12)

Country Link
US (1) US6160443A (de)
EP (2) EP1411696A1 (de)
JP (1) JP2003509910A (de)
KR (1) KR100659992B1 (de)
CN (1) CN1186910C (de)
CA (1) CA2384818A1 (de)
DE (1) DE60028983T2 (de)
HK (1) HK1047208B (de)
MY (1) MY135918A (de)
NO (1) NO20021117L (de)
TW (1) TW494659B (de)
WO (1) WO2001019048A1 (de)

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US6842495B1 (en) * 1998-11-03 2005-01-11 Broadcom Corporation Dual mode QAM/VSB receiver
US6249179B1 (en) * 1999-09-08 2001-06-19 Atmel Corporation Direct digital synthesis in a QAM demodulator
US6545532B1 (en) * 1999-09-08 2003-04-08 Atmel Corporation Timing recovery circuit in a QAM demodulator
US6249180B1 (en) * 1999-09-08 2001-06-19 Atmel Corporation Phase noise and additive noise estimation in a QAM demodulator
US6633288B2 (en) * 1999-09-15 2003-10-14 Sage, Inc. Pixel clock PLL frequency and phase optimization in sampling of video signals for high quality image display
US6668032B1 (en) * 2000-04-20 2003-12-23 Advanced Micro Devices, Inc. Device and method for signal sampling at multiple clock rates
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US6442217B1 (en) * 2000-05-22 2002-08-27 Sicom, Inc. Digital communication receiver with digital, IF, I-Q balancer
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US6735725B1 (en) * 2000-09-29 2004-05-11 Nortel Networks Limited Method and apparatus for performance management of a multiplexed transmission system
US7068731B1 (en) * 2000-10-24 2006-06-27 Agere Systems, Inc. Apparatus and method for multi-channel receiver
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KR100499491B1 (ko) * 2002-11-27 2005-07-05 엘지전자 주식회사 디지털 티브이 수신기
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KR100546609B1 (ko) * 2003-08-30 2006-01-26 엘지전자 주식회사 심볼 클럭 복조 장치
DE10347259B4 (de) * 2003-10-08 2013-10-31 Entropic Communications, Inc. Verfahren zum Synchronisieren einer Schaltungsanordnung beim Empfang eines modulierten Signals
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Also Published As

Publication number Publication date
NO20021117D0 (no) 2002-03-06
KR100659992B1 (ko) 2006-12-22
TW494659B (en) 2002-07-11
NO20021117L (no) 2002-03-06
KR20020029781A (ko) 2002-04-19
WO2001019048A1 (en) 2001-03-15
CN1373957A (zh) 2002-10-09
HK1047208A1 (en) 2003-02-07
JP2003509910A (ja) 2003-03-11
CA2384818A1 (en) 2001-03-15
EP1214823A1 (de) 2002-06-19
HK1047208B (zh) 2005-05-13
US6160443A (en) 2000-12-12
MY135918A (en) 2008-07-31
DE60028983T2 (de) 2007-01-04
CN1186910C (zh) 2005-01-26
EP1411696A1 (de) 2004-04-21
EP1214823B1 (de) 2006-06-21

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8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee