DE69519646T2 - Verfahren und Einrichtung zur Trägerrückgewinnung für ein QAM-moduliertes Signal - Google Patents
Verfahren und Einrichtung zur Trägerrückgewinnung für ein QAM-moduliertes SignalInfo
- Publication number
- DE69519646T2 DE69519646T2 DE69519646T DE69519646T DE69519646T2 DE 69519646 T2 DE69519646 T2 DE 69519646T2 DE 69519646 T DE69519646 T DE 69519646T DE 69519646 T DE69519646 T DE 69519646T DE 69519646 T2 DE69519646 T2 DE 69519646T2
- Authority
- DE
- Germany
- Prior art keywords
- subset
- points
- qam
- constellation pattern
- carrier
- 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
- 238000000034 method Methods 0.000 title abstract 2
- 238000011084 recovery Methods 0.000 title 1
- 230000002596 correlated effect Effects 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
- H04L27/3827—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using only the demodulated baseband signals
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/238,316 US5519733A (en) | 1994-05-05 | 1994-05-05 | Method and apparatus for recovering a qam carrier |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69519646D1 DE69519646D1 (de) | 2001-01-25 |
DE69519646T2 true DE69519646T2 (de) | 2001-08-02 |
Family
ID=22897376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69519646T Expired - Lifetime DE69519646T2 (de) | 1994-05-05 | 1995-05-03 | Verfahren und Einrichtung zur Trägerrückgewinnung für ein QAM-moduliertes Signal |
Country Status (11)
Country | Link |
---|---|
US (1) | US5519733A (de) |
EP (1) | EP0681386B1 (de) |
JP (1) | JPH0846661A (de) |
KR (1) | KR100365383B1 (de) |
AT (1) | ATE198247T1 (de) |
AU (1) | AU681767B2 (de) |
CA (1) | CA2148200C (de) |
DE (1) | DE69519646T2 (de) |
ES (1) | ES2153865T3 (de) |
NO (1) | NO951732L (de) |
TW (1) | TW257916B (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3041175B2 (ja) * | 1993-11-12 | 2000-05-15 | 株式会社東芝 | Ofdm同期復調回路 |
JP3269933B2 (ja) * | 1995-03-20 | 2002-04-02 | 富士通株式会社 | キャリア再生回路 |
JPH09214578A (ja) * | 1996-01-30 | 1997-08-15 | Fujitsu Ltd | 搬送波再生回路 |
KR970068393A (ko) * | 1996-03-11 | 1997-10-13 | 김광호 | 이산 다중 톤 시스템 수신단의 샘플링 클럭 복원 장치 및 방법 |
GB9618132D0 (en) * | 1996-08-30 | 1996-10-09 | Sgs Thomson Microelectronics | Improvements in or relating to an ATM switch |
US5940450A (en) * | 1997-02-28 | 1999-08-17 | Hitachi America, Ltd. | Carrier recovery method and apparatus |
KR100269257B1 (ko) * | 1997-10-28 | 2000-10-16 | 정선종 | 16-큐에이엠진폭변조신호의반송파복원방법 |
WO1999033249A1 (en) * | 1997-12-19 | 1999-07-01 | Blake Rice | Automated right-party contact telephone system |
US6560294B1 (en) | 1998-09-25 | 2003-05-06 | Texas Instruments Incorporated | Phase estimation in carrier recovery of phase-modulated signals such as QAM signals |
US6738429B1 (en) * | 1999-06-01 | 2004-05-18 | Harris Corporation | Decision-directed carrier frequency detector and method for QAM |
KR100390842B1 (ko) * | 2000-12-22 | 2003-07-10 | 주식회사 하이닉스반도체 | 고차 직각변조를 위한 극성판단위상검출회로 및 방법 |
ATE349842T1 (de) | 2001-02-26 | 2007-01-15 | Juniper Networks Inc | Schätzung eines frequenzversatzes, zur anwendung bei kurzen datenbursts |
KR100418583B1 (ko) * | 2001-05-28 | 2004-02-11 | 주식회사 하이닉스반도체 | 자동 전환방식을 적용한 기어 쉬프트 위상 동기 장치와위상 동기 방법 |
KR100439220B1 (ko) * | 2002-03-26 | 2004-07-05 | 엘지전자 주식회사 | 코드분할다중엑세스 시스템의 통화품질 저하 방지회로 및그 운용방법 |
US7123663B2 (en) * | 2002-06-04 | 2006-10-17 | Agence Spatiale Europeenne | Coded digital modulation method for communication system |
US20080123788A1 (en) * | 2006-11-29 | 2008-05-29 | Supat Wongwirawat | Method and apparatus for detecting and correcting modulated signal impairments |
US20080123787A1 (en) * | 2006-11-29 | 2008-05-29 | Supat Wongwirawat | Method and apparatus for detecting and correcting modulated signal impairments |
WO2010061435A1 (ja) * | 2008-11-25 | 2010-06-03 | 富士通株式会社 | 代替処理判定方法、代替処理判定装置、プログラム、及び携帯電話端末 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2542536B1 (fr) * | 1983-03-07 | 1985-07-12 | Trt Telecom Radio Electr | Dispositif de recuperation de la porteuse d'un signal d'entree module par sauts d'amplitude et par sauts de phase |
FR2621188B1 (fr) * | 1987-09-25 | 1989-12-29 | Labo Electronique Physique | Circuit de recuperation de l'onde porteuse de systemes de transmissions numeriques |
JP2927929B2 (ja) * | 1990-10-29 | 1999-07-28 | 日本電気株式会社 | 搬送波同期回路 |
DE4216156C1 (de) * | 1992-05-15 | 1993-08-19 | Ant Nachrichtentechnik Gmbh, 7150 Backnang, De |
-
1994
- 1994-05-05 US US08/238,316 patent/US5519733A/en not_active Expired - Lifetime
- 1994-06-16 TW TW083105472A patent/TW257916B/zh active
-
1995
- 1995-04-28 CA CA002148200A patent/CA2148200C/en not_active Expired - Lifetime
- 1995-05-03 DE DE69519646T patent/DE69519646T2/de not_active Expired - Lifetime
- 1995-05-03 AT AT95106634T patent/ATE198247T1/de not_active IP Right Cessation
- 1995-05-03 AU AU17850/95A patent/AU681767B2/en not_active Ceased
- 1995-05-03 EP EP95106634A patent/EP0681386B1/de not_active Expired - Lifetime
- 1995-05-03 ES ES95106634T patent/ES2153865T3/es not_active Expired - Lifetime
- 1995-05-04 NO NO951732A patent/NO951732L/no unknown
- 1995-05-04 KR KR1019950011161A patent/KR100365383B1/ko not_active IP Right Cessation
- 1995-05-08 JP JP7134738A patent/JPH0846661A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
AU1785095A (en) | 1995-11-16 |
NO951732L (no) | 1995-11-06 |
CA2148200C (en) | 2002-09-17 |
ES2153865T3 (es) | 2001-03-16 |
CA2148200A1 (en) | 1995-11-06 |
ATE198247T1 (de) | 2001-01-15 |
EP0681386A2 (de) | 1995-11-08 |
KR100365383B1 (ko) | 2003-03-03 |
KR950035230A (ko) | 1995-12-30 |
AU681767B2 (en) | 1997-09-04 |
TW257916B (en) | 1995-09-21 |
NO951732D0 (no) | 1995-05-04 |
EP0681386B1 (de) | 2000-12-20 |
JPH0846661A (ja) | 1996-02-16 |
DE69519646D1 (de) | 2001-01-25 |
US5519733A (en) | 1996-05-21 |
EP0681386A3 (de) | 1995-11-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69519646D1 (de) | Verfahren und Einrichtung zur Trägerrückgewinnung für ein QAM-moduliertes Signal | |
ATE132648T1 (de) | Speichermedium und vorrichtung zur rückgewinnung von data des mediums durch uberabtastung | |
IL122047A (en) | Method system and article of manufacture for producing a network navigation device | |
DE69425626T2 (de) | Frequenzwiederverwendungstechnik für eine Anordnung von Kommunikationssatelliten mit hoher Datenrate | |
FR2682841B1 (fr) | Procede de detection de faux accrochages d'un signal de reference sur un signal initialement module en modulation numerique plurivalente decalee, procede de demodulation numerique coherente l'utilisant. | |
TW200420052A (en) | Improving hierarchical 8PSK performance | |
DE69420999D1 (de) | Druckverfahren und -Vorrichtung | |
DE69425625D1 (de) | Kommunikationsprotokoll für eine Anordnung von Kommunikationssatelliten mit hoher Datenrate | |
EP1345408A3 (de) | Übertragungsgerät, an einem Informationsverarbeitungsendgerät wie einem Personalcomputer, anschliessbar | |
PT92980A (pt) | Processo de controlar rapidamente a frequencia de um receptor radio coerente e disposicao para realizar o processo | |
MY101933A (en) | Method for detecting and correcting failure in mounting of electronic parts on substrate and apparatus therefor | |
ATE86054T1 (de) | Verfahren und vorrichtung zur hinzufuegung und trennung eines digitalen kanales mit niedriger datenrate zum digitalen kanal mit hoher datenrate einer uebertragungsleitung. | |
AU6100698A (en) | Method for producing card-shaped data carriers | |
EP1059785A3 (de) | Durch Mehrratenverarbeitung umstellbarer Modem | |
CA2220417A1 (en) | Carrier regenerating circuit, multi-level quadrature amplitude demodulator, and method of detecting frequency deviation | |
EP0757462A3 (de) | Korrektur eine Frequenzverschiebung für ein Datenempfangssystem | |
DE3763343D1 (de) | Verfahren und anordnung zum fixieren von auf einem bandfoermigen aufzeichnungstraeger aufgebrachten tonerbildern mit hoher qualitaetskonstanz. | |
ZA200002063B (en) | Process for recovering operational or error information for software modules of software on board a digital apparatus and associated digital apparatus. | |
DE59008809D1 (de) | Verfahren und Anordnung zum Übermitteln von Betriebszustandsinformationen zwischen zentralen und dezentralen Einrichtungen eines Kommunikationssystems. | |
ATE188825T1 (de) | Phasendetektor für die steuerung der rückgewinnung eines trägersignals | |
RU93006878A (ru) | Способ восстановления переданных информационных сигналов после прохождения их через канал связи и устройство для его осуществления | |
DE59103299D1 (de) | Anordnung elektronischer teile für ein antiblockiersystem eines fahrzeuges. | |
ATE42659T1 (de) | Verfahren und vorrichtung zur empfangsseitigen rueckgewinnung eines taktsignals. | |
DE59502038D1 (de) | Phasendetektor für die Steuerung der Rückgewinnung eines Trägersignals | |
ATE175047T1 (de) | Verarbeitungssystem für informationsträger |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: VIZIO, INC., IRVINE, CALIF., US |
|
8328 | Change in the person/name/address of the agent |
Representative=s name: KUHNEN & WACKER PATENT- UND RECHTSANWALTSBUERO, 85 |