BR8703890A - Metodo e equipamento para recuperacao da portadora de sinais modulados - Google Patents

Metodo e equipamento para recuperacao da portadora de sinais modulados

Info

Publication number
BR8703890A
BR8703890A BR8703890A BR8703890A BR8703890A BR 8703890 A BR8703890 A BR 8703890A BR 8703890 A BR8703890 A BR 8703890A BR 8703890 A BR8703890 A BR 8703890A BR 8703890 A BR8703890 A BR 8703890A
Authority
BR
Brazil
Prior art keywords
recovery
equipment
modulated signal
signal carrier
carrier
Prior art date
Application number
BR8703890A
Other languages
English (en)
Inventor
Harold B Pearce
Lynn P West
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of BR8703890A publication Critical patent/BR8703890A/pt

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
    • H04L2027/0067—Phase error detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
BR8703890A 1986-08-29 1987-07-27 Metodo e equipamento para recuperacao da portadora de sinais modulados BR8703890A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/901,901 US4712221A (en) 1986-08-29 1986-08-29 Carrier recovery of modulated signals

Publications (1)

Publication Number Publication Date
BR8703890A true BR8703890A (pt) 1988-03-29

Family

ID=25415024

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8703890A BR8703890A (pt) 1986-08-29 1987-07-27 Metodo e equipamento para recuperacao da portadora de sinais modulados

Country Status (5)

Country Link
US (1) US4712221A (pt)
EP (1) EP0258649B1 (pt)
JP (1) JP2769469B2 (pt)
BR (1) BR8703890A (pt)
DE (1) DE3783837T2 (pt)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4937841A (en) * 1988-06-29 1990-06-26 Bell Communications Research, Inc. Method and circuitry for carrier recovery for time division multiple access radio systems
US4871974A (en) * 1988-12-23 1989-10-03 International Business Machines, Corp. Coherent phase shift keyed demodulator
IT1244206B (it) * 1990-12-19 1994-07-08 Telettra Spa Sistema e circuito per la stima della frequenza di portante di un segnale
FR2672454B1 (fr) * 1991-01-31 1994-10-07 Alcatel Telspace Procede de demodulation coherente pour modulation a deplacement de phase et dispositif de mise en óoeuvre de ce procede.
CA2073944C (en) * 1991-07-26 2000-09-19 Woo H. Paik Carrier phase recovery for an adaptive equalizer
JPH0676477A (ja) * 1992-08-26 1994-03-18 Hitachi Ltd 適応等化回路を有するデータ再生装置
JP3390272B2 (ja) * 1994-11-10 2003-03-24 沖電気工業株式会社 同期検波回路
SE506847C2 (sv) * 1996-06-28 1998-02-16 Ericsson Telefon Ab L M Förfarande och anordning vid fasmodulerade signaler
FR2779888B1 (fr) 1998-06-16 2000-09-08 Sgs Thomson Microelectronics Circuit de detection de verrouillage d'une boucle de synchronisation d'un demodulateur qpsk
US7072392B2 (en) * 2000-11-13 2006-07-04 Micronas Semiconductors, Inc. Equalizer for time domain signal processing
US6940557B2 (en) * 2001-02-08 2005-09-06 Micronas Semiconductors, Inc. Adaptive interlace-to-progressive scan conversion algorithm
US6829297B2 (en) * 2001-06-06 2004-12-07 Micronas Semiconductors, Inc. Adaptive equalizer having a variable step size influenced by output from a trellis decoder
US7190744B2 (en) * 2001-06-07 2007-03-13 Micronas Semiconductors, Inc. Error generation for adaptive equalizer
US7418034B2 (en) * 2001-06-19 2008-08-26 Micronas Semiconductors. Inc. Combined trellis decoder and decision feedback equalizer
US20030206053A1 (en) * 2002-04-04 2003-11-06 Jingsong Xia Carrier recovery for DTV receivers
US20030235259A1 (en) * 2002-04-04 2003-12-25 Jingsong Xia System and method for symbol clock recovery
US7376181B2 (en) * 2002-04-05 2008-05-20 Micronas Semiconductors, Inc. Transposed structure for a decision feedback equalizer combined with a trellis decoder
US6995617B2 (en) * 2002-04-05 2006-02-07 Micronas Semiconductors, Inc. Data-directed frequency-and-phase lock loop
US6980059B2 (en) * 2002-04-05 2005-12-27 Micronas Semiconductors, Inc. Data directed frequency acquisition loop that synchronizes to a received signal by using the redundancy of the data in the frequency domain
US7321642B2 (en) * 2002-04-05 2008-01-22 Micronas Semiconductors, Inc. Synchronization symbol re-insertion for a decision feedback equalizer combined with a trellis decoder
US7272203B2 (en) * 2002-04-05 2007-09-18 Micronas Semiconductors, Inc. Data-directed frequency-and-phase lock loop for decoding an offset-QAM modulated signal having a pilot
US8401503B2 (en) * 2005-03-01 2013-03-19 Qualcomm Incorporated Dual-loop automatic frequency control for wireless communication
JP4126051B2 (ja) * 2005-03-16 2008-07-30 日本テキサス・インスツルメンツ株式会社 トラッキングエラー検出方法、トラッキングサーボ方法、トラッキングエラー検出回路、並びにトラッキングサーボ回路
JP4845120B2 (ja) * 2006-12-14 2011-12-28 株式会社東京自働機械製作所 粉粒体充填装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3660764A (en) * 1969-11-26 1972-05-02 Bell Telephone Labor Inc Non-coherent differential phase detection
JPS5297661A (en) * 1976-02-13 1977-08-16 Nippon Telegr & Teleph Corp <Ntt> Carrier wave reproduction equipment
JPS54130811A (en) * 1978-04-03 1979-10-11 Nippon Telegr & Teleph Corp <Ntt> Carrier wave reproducing device
US4253184A (en) * 1979-11-06 1981-02-24 Bell Telephone Laboratories, Incorporated Phase-jitter compensation using periodic harmonically related components
JPS56140746A (en) * 1980-04-02 1981-11-04 Nippon Telegr & Teleph Corp <Ntt> Carrier wave reproducing circuit for multi-value qam
US4447910A (en) * 1981-06-02 1984-05-08 Harris Corporation Phase tracking correction scheme for high frequency modem
DE3272570D1 (en) * 1981-08-10 1986-09-18 Fujitsu Ltd Carrier recovery circuit
US4457005A (en) * 1981-12-07 1984-06-26 Motorola, Inc. Digital coherent PSK demodulator and detector
US4468794A (en) * 1982-01-11 1984-08-28 The United States Of America As Represented By The Secretary Of The Navy Digital coherent detector
FR2542536B1 (fr) * 1983-03-07 1985-07-12 Trt Telecom Radio Electr Dispositif de recuperation de la porteuse d'un signal d'entree module par sauts d'amplitude et par sauts de phase
FR2543379B1 (fr) * 1983-03-25 1990-03-02 Thomson Csf Dispositif de demodulation directe en hyperfrequence et chaine de reception hyperfrequence comportant un tel dispositif
US4555667A (en) * 1983-09-26 1985-11-26 Rixon, Inc. Synchronous digital QPSK demodulator with carrier error correction
JPS6121660A (ja) * 1984-07-10 1986-01-30 Toshiba Corp 搬送波再生回路
US4560941A (en) * 1984-09-21 1985-12-24 General Electric Company Frequency modulation detector using digital signal vector processing
JPS61198849A (ja) * 1985-02-27 1986-09-03 Fujitsu Ltd 選択制御搬送波再生方式

Also Published As

Publication number Publication date
EP0258649A3 (en) 1990-01-31
EP0258649B1 (en) 1993-01-27
JPS6359147A (ja) 1988-03-15
DE3783837T2 (de) 1993-08-19
JP2769469B2 (ja) 1998-06-25
DE3783837D1 (de) 1993-03-11
EP0258649A2 (en) 1988-03-09
US4712221A (en) 1987-12-08

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