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
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)
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)
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)
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 |
-
1984
- 1984-08-27 JP JP59177857A patent/JPS6156555A/ja active Granted
-
1985
- 1985-08-26 CA CA000489398A patent/CA1240001A/en not_active Expired
- 1985-08-26 AU AU46641/85A patent/AU574975B2/en not_active Expired
- 1985-08-27 EP EP85110746A patent/EP0173298B1/de not_active Expired - Lifetime
- 1985-08-27 DE DE8585110746T patent/DE3582539D1/de not_active Expired - Lifetime
- 1985-08-27 US US06/769,922 patent/US4620159A/en not_active Expired - Lifetime
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 |