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ZA879132B - Process and circuit for acquisition of carrier synchronism in coherent demodulators - Google Patents

Process and circuit for acquisition of carrier synchronism in coherent demodulators

Info

Publication number
ZA879132B
ZA879132B ZA879132A ZA879132A ZA879132B ZA 879132 B ZA879132 B ZA 879132B ZA 879132 A ZA879132 A ZA 879132A ZA 879132 A ZA879132 A ZA 879132A ZA 879132 B ZA879132 B ZA 879132B
Authority
ZA
South Africa
Prior art keywords
acquisition
circuit
coherent demodulators
synchronism
carrier
Prior art date
Application number
ZA879132A
Other languages
English (en)
Inventor
Lo Curto Michelangelo
Ceroni Ettore
Original Assignee
Siemens Telecomunicazioni S.P.A.
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 Siemens Telecomunicazioni S.P.A. filed Critical Siemens Telecomunicazioni S.P.A.
Publication of ZA879132B publication Critical patent/ZA879132B/xx

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)
ZA879132A 1986-12-05 1987-12-04 Process and circuit for acquisition of carrier synchronism in coherent demodulators ZA879132B (en)

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 (1)

Publication Number Publication Date
ZA879132B true ZA879132B (en) 1988-06-04

Family

ID=11198114

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA879132A ZA879132B (en) 1986-12-05 1987-12-04 Process and circuit for acquisition of carrier synchronism in coherent demodulators

Country Status (8)

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

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
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
US6128334A (en) * 1997-02-21 2000-10-03 Usa Digital Radio, Inc. Receiver addressable AM compatible digital broadcast system
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
ES2048154T3 (es) 1994-03-16
JPS63151246A (ja) 1988-06-23
EP0270160A2 (de) 1988-06-08
US4795986A (en) 1989-01-03
EP0270160A3 (en) 1990-03-21
NO170249B (no) 1992-06-15
JP2557426B2 (ja) 1996-11-27
NO875070D0 (no) 1987-12-04
DE3788858D1 (de) 1994-03-03
NO170249C (no) 1992-09-23
IT1199705B (it) 1988-12-30
IT8622584A0 (it) 1986-12-05
NO875070L (no) 1988-06-06
DE3788858T2 (de) 1994-06-01
EP0270160B1 (de) 1994-01-19

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