DE69317137D1 - Einrichtung zur Demodulation von pi/4-QPSK-Signalen - Google Patents
Einrichtung zur Demodulation von pi/4-QPSK-SignalenInfo
- Publication number
- DE69317137D1 DE69317137D1 DE69317137T DE69317137T DE69317137D1 DE 69317137 D1 DE69317137 D1 DE 69317137D1 DE 69317137 T DE69317137 T DE 69317137T DE 69317137 T DE69317137 T DE 69317137T DE 69317137 D1 DE69317137 D1 DE 69317137D1
- Authority
- DE
- Germany
- Prior art keywords
- demodulating
- qpsk signals
- qpsk
- signals
- 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 - Fee Related
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
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
- H04L2027/0028—Correction of carrier offset at passband only
-
- 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
- H04L2027/0053—Closed loops
- H04L2027/0057—Closed loops quadrature phase
-
- 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
- H04L2027/0063—Elements of loops
- H04L2027/0067—Phase error detectors
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 |
---|---|---|---|
FR9204101A FR2689712B1 (fr) | 1992-04-03 | 1992-04-03 | Dispositif de démodulation de signaux numériques modulés selon une technique à constellations de modulation alternées. |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69317137D1 true DE69317137D1 (de) | 1998-04-09 |
DE69317137T2 DE69317137T2 (de) | 1998-06-25 |
Family
ID=9428465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69317137T Expired - Fee Related DE69317137T2 (de) | 1992-04-03 | 1993-04-01 | Einrichtung zur Demodulation von pi/4-QPSK-Signalen |
Country Status (7)
Country | Link |
---|---|
US (1) | US5438594A (de) |
EP (1) | EP0564361B1 (de) |
JP (1) | JPH0621989A (de) |
CA (1) | CA2093275A1 (de) |
DE (1) | DE69317137T2 (de) |
ES (1) | ES2115029T3 (de) |
FR (1) | FR2689712B1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2280324B (en) * | 1993-07-16 | 1998-07-22 | Plessey Semiconductors Ltd | Detectors |
JPH07264257A (ja) * | 1994-03-24 | 1995-10-13 | Kokusai Electric Co Ltd | π/4シフトQPSK同期回路 |
JP3540393B2 (ja) * | 1994-10-31 | 2004-07-07 | 三洋電機株式会社 | コスタスループ |
KR100395584B1 (ko) * | 1995-06-08 | 2004-02-11 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 위상변조기와주파수멀티플라이어를갖는전송기를이용한전송시스템 |
US6097770A (en) * | 1996-10-31 | 2000-08-01 | Lucent Technologies Inc. | Frequency offset estimation for wireless systems based on channel impulse response |
FR2764158B1 (fr) * | 1997-06-03 | 1999-08-20 | Texas Instruments France | Procede et dispositif d'estimation du decalage de frequence dans un signal recu par un demodulateur de telephone mobile |
US6546425B1 (en) * | 1998-10-09 | 2003-04-08 | Netmotion Wireless, Inc. | Method and apparatus for providing mobile and other intermittent connectivity in a computing environment |
US6377620B1 (en) * | 1999-01-19 | 2002-04-23 | Interdigital Technology Corporation | Balancing amplitude and phase |
DE19948745A1 (de) * | 1999-10-09 | 2001-04-12 | Philips Corp Intellectual Pty | Schaltungsanordnung zur Demodulation eines Zwischenfrequenz-Videosignals |
US7356089B2 (en) * | 2003-09-05 | 2008-04-08 | Nortel Networks Limited | Phase offset spatial multiplexing |
JP4684185B2 (ja) * | 2006-08-15 | 2011-05-18 | 富士通株式会社 | 通信システム |
GB2459478A (en) * | 2008-04-23 | 2009-10-28 | Audium Semiconductor Ltd | Telecommunication System with simplified Receiver |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5820181B2 (ja) * | 1974-09-25 | 1983-04-21 | 日本電気株式会社 | タソウイソウドウキフクチヨウソウチ |
US4344178A (en) * | 1980-09-26 | 1982-08-10 | Harris Corporation | Costas loop QPSK demodulator |
DE3823374A1 (de) * | 1988-07-09 | 1990-01-18 | Philips Patentverwaltung | Vorrichtung zur entzerrung und demodulation winkelmodulierter datensignale |
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 |
-
1992
- 1992-04-03 FR FR9204101A patent/FR2689712B1/fr not_active Expired - Fee Related
-
1993
- 1993-04-01 EP EP93400848A patent/EP0564361B1/de not_active Expired - Lifetime
- 1993-04-01 DE DE69317137T patent/DE69317137T2/de not_active Expired - Fee Related
- 1993-04-01 ES ES93400848T patent/ES2115029T3/es not_active Expired - Lifetime
- 1993-04-02 CA CA002093275A patent/CA2093275A1/fr not_active Abandoned
- 1993-04-02 JP JP5076823A patent/JPH0621989A/ja active Pending
- 1993-04-02 US US08/041,967 patent/US5438594A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5438594A (en) | 1995-08-01 |
EP0564361B1 (de) | 1998-03-04 |
CA2093275A1 (fr) | 1993-10-04 |
FR2689712B1 (fr) | 1994-08-19 |
ES2115029T3 (es) | 1998-06-16 |
FR2689712A1 (fr) | 1993-10-08 |
EP0564361A1 (de) | 1993-10-06 |
DE69317137T2 (de) | 1998-06-25 |
JPH0621989A (ja) | 1994-01-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: ALCATEL, PARIS, FR |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |