ES2153865T3 - Procedimiento y aparato para recuperar una portadora qam. - Google Patents
Procedimiento y aparato para recuperar una portadora qam.Info
- Publication number
- ES2153865T3 ES2153865T3 ES95106634T ES95106634T ES2153865T3 ES 2153865 T3 ES2153865 T3 ES 2153865T3 ES 95106634 T ES95106634 T ES 95106634T ES 95106634 T ES95106634 T ES 95106634T ES 2153865 T3 ES2153865 T3 ES 2153865T3
- Authority
- ES
- Spain
- Prior art keywords
- subset
- points
- carrier
- constellation pattern
- data points
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Amplitude Modulation (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Noise Elimination (AREA)
- Peptides Or Proteins (AREA)
- Cephalosporin Compounds (AREA)
Abstract
UN METODO Y APARATO PARA RECUPERAR Y SEGUIR EL PORTADOR EN UN SISTEMA DE COMUNICACION DE QUAM, INCLUSO BAJO CONDICIONES DE FUERTES INTERFERENCIAS. UN SUBGRUPO DE PUNTOS FIJOS (38) ES DEFINIDO SOBRE UN DISEÑO DE CONSTELACION IDEAL (30) PARA COMPARAR CON LOS PUNTOS DE DATOS EN UNA SEÑAL RECIBIDA. EL SUBGRUPO INCLUYE TODOS LOS PUNTOS (38) INTERSECTADOS POR N RADIOS (40,42,44,46) (EJEMPLO, LAS CUATRO DIAGONALES) DEL DISEÑO DE CONSTELACION (30). TAMBIEN PUEDEN SER PROPORCIONADOS EN EL SUBGRUPO PUNTOS ADICIONALES A LO LARGO DEL PERIMETRO DEL DISEÑO DE CONSTELACION (36A-H). LOS PUNTOS DE DATOS RECIBIDOS A TRAVES DE UN PORTADOS SON CORRELACIONADOS CON LOS PUNTOS FIJOS (38) DEL SUBGRUPO PARA GENERAR UNA SEÑAL DE ERROR INDICATIVA DE UNA DIFERENCIA DE FASE ENTRE LOS PUNTOS FIJOS DE SUBGRUPO Y LOS PUNTOS DE DATOS RECIBIDOS CORRELACIONADOS CON LOS MISMOS.
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 (1)
Publication Number | Publication Date |
---|---|
ES2153865T3 true ES2153865T3 (es) | 2001-03-16 |
Family
ID=22897376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES95106634T Expired - Lifetime ES2153865T3 (es) | 1994-05-05 | 1995-05-03 | Procedimiento y aparato para recuperar una portadora qam. |
Country Status (11)
Country | Link |
---|---|
US (1) | US5519733A (es) |
EP (1) | EP0681386B1 (es) |
JP (1) | JPH0846661A (es) |
KR (1) | KR100365383B1 (es) |
AT (1) | ATE198247T1 (es) |
AU (1) | AU681767B2 (es) |
CA (1) | CA2148200C (es) |
DE (1) | DE69519646T2 (es) |
ES (1) | ES2153865T3 (es) |
NO (1) | NO951732L (es) |
TW (1) | TW257916B (es) |
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 |
GB2347583B (en) * | 1997-12-19 | 2003-03-12 | 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 |
JP5527214B2 (ja) * | 2008-11-25 | 2014-06-18 | 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 (es) * | 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 AT AT95106634T patent/ATE198247T1/de not_active IP Right Cessation
- 1995-05-03 EP EP95106634A patent/EP0681386B1/en not_active Expired - Lifetime
- 1995-05-03 DE DE69519646T patent/DE69519646T2/de not_active Expired - Lifetime
- 1995-05-03 AU AU17850/95A patent/AU681767B2/en not_active Ceased
- 1995-05-03 ES ES95106634T patent/ES2153865T3/es not_active Expired - Lifetime
- 1995-05-04 KR KR1019950011161A patent/KR100365383B1/ko not_active IP Right Cessation
- 1995-05-04 NO NO951732A patent/NO951732L/no unknown
- 1995-05-08 JP JP7134738A patent/JPH0846661A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ATE198247T1 (de) | 2001-01-15 |
NO951732D0 (no) | 1995-05-04 |
NO951732L (no) | 1995-11-06 |
US5519733A (en) | 1996-05-21 |
AU681767B2 (en) | 1997-09-04 |
AU1785095A (en) | 1995-11-16 |
TW257916B (en) | 1995-09-21 |
JPH0846661A (ja) | 1996-02-16 |
KR950035230A (ko) | 1995-12-30 |
CA2148200C (en) | 2002-09-17 |
DE69519646D1 (de) | 2001-01-25 |
DE69519646T2 (de) | 2001-08-02 |
KR100365383B1 (ko) | 2003-03-03 |
CA2148200A1 (en) | 1995-11-06 |
EP0681386A2 (en) | 1995-11-08 |
EP0681386B1 (en) | 2000-12-20 |
EP0681386A3 (en) | 1995-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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