DE3582539D1 - Demodulationsvorrichtung fuer traegerwellen mit mehrphasenumtastung oder mit mehrpegel-qam. - Google Patents

Demodulationsvorrichtung fuer traegerwellen mit mehrphasenumtastung oder mit mehrpegel-qam.

Info

Publication number
DE3582539D1
DE3582539D1 DE8585110746T DE3582539T DE3582539D1 DE 3582539 D1 DE3582539 D1 DE 3582539D1 DE 8585110746 T DE8585110746 T DE 8585110746T DE 3582539 T DE3582539 T DE 3582539T DE 3582539 D1 DE3582539 D1 DE 3582539D1
Authority
DE
Germany
Prior art keywords
demodulation device
phase reverse
level qam
carrier shafts
shafts
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 - Lifetime
Application number
DE8585110746T
Other languages
English (en)
Inventor
Yasuharu Yoshida
Manabu Yagi
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3582539D1 publication Critical patent/DE3582539D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
    • H04L7/0334—Processing of samples having at least three levels, e.g. soft decisions

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE8585110746T 1984-08-27 1985-08-27 Demodulationsvorrichtung fuer traegerwellen mit mehrphasenumtastung oder mit mehrpegel-qam. Expired - Lifetime DE3582539D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59177857A JPS6156555A (ja) 1984-08-27 1984-08-27 復調装置

Publications (1)

Publication Number Publication Date
DE3582539D1 true DE3582539D1 (de) 1991-05-23

Family

ID=16038300

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585110746T Expired - Lifetime DE3582539D1 (de) 1984-08-27 1985-08-27 Demodulationsvorrichtung fuer traegerwellen mit mehrphasenumtastung oder mit mehrpegel-qam.

Country Status (6)

Country Link
US (1) US4620159A (de)
EP (1) EP0173298B1 (de)
JP (1) JPS6156555A (de)
AU (1) AU574975B2 (de)
CA (1) CA1240001A (de)
DE (1) DE3582539D1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0624291B2 (ja) * 1985-04-17 1994-03-30 日本電気株式会社 位相検出回路
CA1282127C (en) * 1985-06-29 1991-03-26 Nec Corporation Digital demodulation system
US4794341A (en) * 1985-11-05 1988-12-27 Signal Processors Limited Digital filters and demodulators
JP2756965B2 (ja) * 1988-03-31 1998-05-25 日本無線株式会社 高速伝送レート変調信号用復調器
JP3403849B2 (ja) * 1995-03-17 2003-05-06 富士通株式会社 多重無線装置の受信部に設けられるクロック位相検出回路及びクロック再生回路
US5799037A (en) * 1996-02-16 1998-08-25 David Sarnoff Research Center Inc. Receiver capable of demodulating multiple digital modulation formats
US6005640A (en) * 1996-09-27 1999-12-21 Sarnoff Corporation Multiple modulation format television signal receiver system
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

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972720A (en) * 1957-09-24 1961-02-21 Westinghouse Electric Corp Automatic frequency control apparatus
JPS5917916B2 (ja) * 1975-12-26 1984-04-24 日本電気株式会社 イソウドウキソウチ
FR2408243A1 (fr) * 1977-11-04 1979-06-01 Cit Alcatel Boucle a verrouillage de phase
US4344040A (en) * 1980-03-26 1982-08-10 Canadian Patents & Development Limited Method and apparatus for providing the in-phase and quadrature components of a bandpass signal
JPS57131151A (en) * 1981-02-06 1982-08-13 Nec Corp Carrier wave reproducing circuit
CA1180416A (en) * 1981-05-19 1985-01-02 Botaro Hirosaki Timing recovery circuit
AU556413B2 (en) * 1982-02-10 1986-10-30 Nec Corporation Phase demodulator
US4482869A (en) * 1982-04-13 1984-11-13 Pioneer Electronic Corporation PLL Detection circuit having dual bandwidth loop filter
FR2535554B1 (fr) * 1982-10-29 1986-04-11 Dassault Electronique Procede et appareil pour la reception de messages radio a signaux de type biphase
JPS59161149A (ja) * 1983-03-04 1984-09-11 Nec Corp タイミング同期回路
US4546322A (en) * 1983-08-24 1985-10-08 Reliance Electric Company Adaptable demodulator for arbitrary amplitude and phase keyed modulation signals

Also Published As

Publication number Publication date
JPH0428185B2 (de) 1992-05-13
AU574975B2 (en) 1988-07-14
US4620159A (en) 1986-10-28
EP0173298A2 (de) 1986-03-05
EP0173298A3 (en) 1987-11-04
CA1240001A (en) 1988-08-02
EP0173298B1 (de) 1991-04-17
AU4664185A (en) 1986-03-06
JPS6156555A (ja) 1986-03-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition