IT1199705B - Procedimento e circuito per l'acquisizione del sincronismo di portante in demodulatori coerenti - Google Patents

Procedimento e circuito per l'acquisizione del sincronismo di portante in demodulatori coerenti

Info

Publication number
IT1199705B
IT1199705B IT22584/86A IT2258486A IT1199705B IT 1199705 B IT1199705 B IT 1199705B IT 22584/86 A IT22584/86 A IT 22584/86A IT 2258486 A IT2258486 A IT 2258486A IT 1199705 B IT1199705 B IT 1199705B
Authority
IT
Italy
Prior art keywords
acquisition
procedure
circuit
coherent demodulators
synchronism
Prior art date
Application number
IT22584/86A
Other languages
English (en)
Other versions
IT8622584A0 (it
Inventor
Lo Curto Michelangelo
Ceroni Ettore
Original Assignee
Gte Telecom Spa
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 Gte Telecom Spa filed Critical Gte Telecom Spa
Priority to IT22584/86A priority Critical patent/IT1199705B/it
Publication of IT8622584A0 publication Critical patent/IT8622584A0/it
Priority to EP87202202A priority patent/EP0270160B1/en
Priority to ES87202202T priority patent/ES2048154T3/es
Priority to DE3788858T priority patent/DE3788858T2/de
Priority to US07/121,562 priority patent/US4795986A/en
Priority to JP62301627A priority patent/JP2557426B2/ja
Priority to ZA879132A priority patent/ZA879132B/xx
Priority to NO875070A priority patent/NO170249C/no
Application granted granted Critical
Publication of IT1199705B publication Critical patent/IT1199705B/it

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

Priority Applications (8)

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
EP87202202A EP0270160B1 (en) 1986-12-05 1987-11-12 Process and circuit for acquisition of carrier synchronism in coherent demodulators
ES87202202T ES2048154T3 (es) 1986-12-05 1987-11-12 Proceso y circuito de adquisicion de sincronismo de la portadora en demoduladores coherentes.
DE3788858T DE3788858T2 (de) 1986-12-05 1987-11-12 Verfahren und Schaltung zur Rückgewinnung der Trägersynchronisierung in kohärenten Demodulatoren.
US07/121,562 US4795986A (en) 1986-12-05 1987-11-16 Method and circuit for carrier synchronism recovery in PSK coherent demodulators
JP62301627A JP2557426B2 (ja) 1986-12-05 1987-12-01 同期復調装置における搬送波の同期を得るための方法及び装置
ZA879132A ZA879132B (en) 1986-12-05 1987-12-04 Process and circuit for acquisition of carrier synchronism in coherent demodulators
NO875070A NO170249C (no) 1986-12-05 1987-12-04 Fremgangsmaate og krets for tilveiebringelse av baereboelgesynkronisme ved koherente demodulatorer

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 (2)

Publication Number Publication Date
IT8622584A0 IT8622584A0 (it) 1986-12-05
IT1199705B true IT1199705B (it) 1988-12-30

Family

ID=11198114

Family Applications (1)

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

Country Status (8)

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

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
EP0270160A2 (en) 1988-06-08
NO875070D0 (no) 1987-12-04
JP2557426B2 (ja) 1996-11-27
NO170249B (no) 1992-06-15
EP0270160A3 (en) 1990-03-21
JPS63151246A (ja) 1988-06-23
US4795986A (en) 1989-01-03
DE3788858T2 (de) 1994-06-01
NO875070L (no) 1988-06-06
ZA879132B (en) 1988-06-04
DE3788858D1 (de) 1994-03-03
IT8622584A0 (it) 1986-12-05
ES2048154T3 (es) 1994-03-16
EP0270160B1 (en) 1994-01-19
NO170249C (no) 1992-09-23

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Legal Events

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TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19961218