NO170249C - Fremgangsmaate og krets for tilveiebringelse av baereboelgesynkronisme ved koherente demodulatorer - Google Patents

Fremgangsmaate og krets for tilveiebringelse av baereboelgesynkronisme ved koherente demodulatorer

Info

Publication number
NO170249C
NO170249C NO875070A NO875070A NO170249C NO 170249 C NO170249 C NO 170249C NO 875070 A NO875070 A NO 875070A NO 875070 A NO875070 A NO 875070A NO 170249 C NO170249 C NO 170249C
Authority
NO
Norway
Prior art keywords
symbols
procedure
circuit
providing residential
coherent demodulators
Prior art date
Application number
NO875070A
Other languages
English (en)
Other versions
NO875070L (no
NO170249B (no
NO875070D0 (no
Inventor
Michelangelo Lo Curto
Ettore Ceroni
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Publication of NO875070D0 publication Critical patent/NO875070D0/no
Publication of NO875070L publication Critical patent/NO875070L/no
Publication of NO170249B publication Critical patent/NO170249B/no
Publication of NO170249C publication Critical patent/NO170249C/no

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
    • H04L2027/0046—Open loops
    • H04L2027/0051—Harmonic tracking

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radar Systems Or Details Thereof (AREA)
NO875070A 1986-12-05 1987-12-04 Fremgangsmaate og krets for tilveiebringelse av baereboelgesynkronisme ved koherente demodulatorer NO170249C (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT22584/86A IT1199705B (it) 1986-12-05 1986-12-05 Procedimento e circuito per l'acquisizione del sincronismo di portante in demodulatori coerenti

Publications (4)

Publication Number Publication Date
NO875070D0 NO875070D0 (no) 1987-12-04
NO875070L NO875070L (no) 1988-06-06
NO170249B NO170249B (no) 1992-06-15
NO170249C true NO170249C (no) 1992-09-23

Family

ID=11198114

Family Applications (1)

Application Number Title Priority Date Filing Date
NO875070A NO170249C (no) 1986-12-05 1987-12-04 Fremgangsmaate og krets for tilveiebringelse av baereboelgesynkronisme ved koherente demodulatorer

Country Status (8)

Country Link
US (1) US4795986A (no)
EP (1) EP0270160B1 (no)
JP (1) JP2557426B2 (no)
DE (1) DE3788858T2 (no)
ES (1) ES2048154T3 (no)
IT (1) IT1199705B (no)
NO (1) NO170249C (no)
ZA (1) ZA879132B (no)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2552927B2 (ja) * 1990-01-26 1996-11-13 三菱電機株式会社 π／４シフトＱＰＳＫ信号の復調装置
US5067139A (en) * 1990-12-17 1991-11-19 Motorola, Inc. Coherent detector for QPSK modulation in a TDMA system
DE4140132C2 (de) * 1991-12-05 1994-07-21 Blaupunkt Werke Gmbh Digitaler Oszillator
US5568521A (en) * 1993-09-16 1996-10-22 Unisys Corporation Phase lock indicator circuit for a high frequency recovery loop
US5418489A (en) * 1993-10-08 1995-05-23 Motorola, Inc. Method of recovering a frequency modulated signal
IT1271527B (it) * 1993-10-14 1997-05-30 Sits Soc It Telecom Siemens Metodo di recupero del sincronismo di simbolo in ricevitori di segnali modulati digitalmente e circuito da esso derivato
GB2286950B (en) * 1994-02-22 1998-06-17 Roke Manor Research A direct conversion receiver
JPH07250115A (ja) * 1994-03-09 1995-09-26 Toshiba Corp デジタルデータ受信装置
WO1996007234A1 (en) * 1994-08-26 1996-03-07 Motorola Inc. Communication device with efficient zero-crossing generator
US5930687A (en) * 1996-09-30 1999-07-27 Usa Digital Radio Partners, L.P. Apparatus and method for generating an AM-compatible digital broadcast waveform
KR100368013B1 (ko) * 1996-11-06 2003-02-26 로크 마노 리서치 리미티드 직접변환수신기
US6128334A (en) * 1997-02-21 2000-10-03 Usa Digital Radio, Inc. Receiver addressable AM compatible digital broadcast system
US5878089A (en) * 1997-02-21 1999-03-02 Usa Digital Radio Partners, L.P. Coherent signal detector for AM-compatible digital audio broadcast waveform recovery
DE19735798C1 (de) * 1997-08-18 1998-07-16 Siemens Ag Sendeempfänger
JP2000278344A (ja) * 1999-03-25 2000-10-06 Sanyo Electric Co Ltd 疑似ロック検出システム
US6707863B1 (en) * 1999-05-04 2004-03-16 Northrop Grumman Corporation Baseband signal carrier recovery of a suppressed carrier modulation signal
US6606357B1 (en) 1999-09-10 2003-08-12 Harris Corporation Carrier injecting waveform-based modulation scheme for reducing satellite transponder power requirements and earth terminal antenna size
JP3841077B2 (ja) * 2003-10-17 2006-11-01 ソニー株式会社 デジタル変調回路およびデジタル変調方法、デジタル復調回路およびデジタル復調方法、復調用キャリアの生成回路および生成方法、並びに復調用ビットクロックの生成回路および生成方法
KR100556399B1 (ko) * 2003-12-01 2006-03-03 엘지전자 주식회사 Ｏｏｂ ｑｐｓｋ 수신기의 반송파 복구 장치
DE10361037A1 (de) * 2003-12-23 2005-07-28 Infineon Technologies Ag Verfahren und Vorrichtung zur Demodulation eines phasenmodulierten Signals
RU2286025C1 (ru) * 2005-06-15 2006-10-20 Игорь Борисович Дунаев Способ передачи и приема сигналов квадратурной амплитудной модуляции, система для его осуществления, машиночитаемый носитель и применение способа для синхронизации приема сигналов квадратурной амплитудной модуляции
US8259859B2 (en) * 2009-09-21 2012-09-04 Techwell Llc Method and system for carrier recovery for QAM

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5925500B2 (ja) * 1978-03-03 1984-06-18 日本電気株式会社 搬送波再生回路
JPS55132132A (en) * 1979-03-30 1980-10-14 Nec Corp Phase synchronizing circuit

Also Published As

Publication number Publication date
ZA879132B (en) 1988-06-04
IT1199705B (it) 1988-12-30
US4795986A (en) 1989-01-03
DE3788858T2 (de) 1994-06-01
EP0270160A2 (en) 1988-06-08
JPS63151246A (ja) 1988-06-23
JP2557426B2 (ja) 1996-11-27
IT8622584A0 (it) 1986-12-05
EP0270160A3 (en) 1990-03-21
DE3788858D1 (de) 1994-03-03
NO875070L (no) 1988-06-06
NO170249B (no) 1992-06-15
ES2048154T3 (es) 1994-03-16
NO875070D0 (no) 1987-12-04
EP0270160B1 (en) 1994-01-19

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