ES2151524T3 - Aparato para resolver ambiguedades de fase en un enlace de radio dpsk. - Google Patents
Aparato para resolver ambiguedades de fase en un enlace de radio dpsk.Info
- Publication number
- ES2151524T3 ES2151524T3 ES94110701T ES94110701T ES2151524T3 ES 2151524 T3 ES2151524 T3 ES 2151524T3 ES 94110701 T ES94110701 T ES 94110701T ES 94110701 T ES94110701 T ES 94110701T ES 2151524 T3 ES2151524 T3 ES 2151524T3
- Authority
- ES
- Spain
- Prior art keywords
- demodulation
- data
- invested
- phase
- transmission
- 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
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Artificial Intelligence (AREA)
- Quality & Reliability (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Error Detection And Correction (AREA)
- Time-Division Multiplex Systems (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
LOS ESQUEMAS DE MODULACION QUE REQUIEREN UNA DESMODULACION COMPLETAMENTE COHERENTE USUALMENTE INCLUYEN ALGUNA FORMA DE TRANSMISION CONOCIDA O TRANSMISOR PILOTO PARA RESOLVER LA AMBIGUEDAD DE FASE QUE PODRIA SER INEVITABLE EN CUALQUIER FORMA DE DESMODULACION QUE SE REFIERA A TRANSMISION DE DATOS EN LA QUE SE PERMITA LA DESMODULACION. CUANDO LA TRANSMISION DE LA INFORMACION DE LA CLAVE DEL DESPLAZAMIENTO DE FASE SE UTILIZA SIN NINGUN COMPONENTE DE REFERENCIA Y SE HACE USO DE UNA DECISION DIRIGIDA A LA RECUPERACION DE LA PORTADORA PARA LA DESMODULACION ENTONCES PUEDE UTILIZARSE LA CODIFICACION DE CONTROL DE ERRORES PARA RESOLVER LAS AMBIGUEDADES DE FASE INHERENTE. LOS DATOS DE LA FUENTE SE AUMENTAN CON UNA SUMA DE COMPROBACION RAZONABLE, POR EJEMPLO UNA QUE NO MUESTRE LOS DATOS CORRECTORES PARA TODOS LOS BITS INVERTIDOS ANTES DE LA PROTECCION CON UN CODIGO DE CORRECCION DE ERRORES DELANTERO Y UNA MODULACION. LOS DATOS DESMODULADOS SON CORREGIDOS DE CUALQUIER ERROR Y SE COMPRUEBA LA SUMA. SI TODO ESTO ES CORRECTO ENTONCES LOS DATOS SON ACEPTADOS COMO CORRECTOS. DE OTRA FORMA LOS DATOS DESMODULADOS SON INVERTIDOS Y EL PROCESO SE REPITE. SI ESTO FALLA LOS BLOQUES DE DATOS DESMODULADOS PUEDEN INVERTIRSE ALREDEDOR DE PUNTOS QUE SE CORRESPONDEN CON VALLES EN LA ENERGIA DE LA REFERENCIA DERIVADA DE LA DECISION. LA TECNICA PERMITE UNA DESMODULACION COHERENTE DEL DESPLAZAMIENTO DE FASE SIN QUE NINGUNA TRANSMISION PILOTO DE COMO RESULTADO UN BUEN RENDIMIENTO DE LA RELACION SEÑAL/RUIDO.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9317173A GB2281179B (en) | 1993-08-18 | 1993-08-18 | Apparatus for use in equipment providing a digital radio link between a fixed and a mobile radio unit |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2151524T3 true ES2151524T3 (es) | 2001-01-01 |
Family
ID=10740674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES94110701T Expired - Lifetime ES2151524T3 (es) | 1993-08-18 | 1994-07-09 | Aparato para resolver ambiguedades de fase en un enlace de radio dpsk. |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0639913B1 (es) |
JP (1) | JPH0795254A (es) |
CN (1) | CN1052135C (es) |
DE (1) | DE69426004T2 (es) |
ES (1) | ES2151524T3 (es) |
GB (1) | GB2281179B (es) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3148834B2 (ja) * | 1995-07-07 | 2001-03-26 | ノーテル・ネットワークス・リミテッド | ディジタル変調信号用キャリヤ再生方法および装置 |
KR100229042B1 (ko) * | 1997-04-26 | 1999-11-01 | 윤종용 | 하드웨어소모 감소 및 탐색성능이 향상된 레이크 수신기 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806647A (en) * | 1972-07-28 | 1974-04-23 | Communications Satellite Corp | Phase ambiguity resolution system using convolutional coding-threshold decoding |
GB2116403B (en) * | 1982-03-01 | 1985-10-23 | British Broadcasting Corp | Improvements relating to digital data transmission |
GB8609711D0 (en) * | 1986-04-21 | 1986-05-29 | Clark A P | Channel estimation & detection |
US5311523A (en) * | 1988-12-08 | 1994-05-10 | Kabushiki Kaisha Toshiba | Carrier phase synchronous type maximum likelihood decoder |
EP0379625B1 (de) * | 1989-01-27 | 1995-07-19 | Siemens Aktiengesellschaft | Verfahren zur Behandlung von paritätsüberwachbaren Binärcodeworten, die im Zuge ihrer Übertragung eine digitale Dämpfung und/oder Codekonvertierung erfahren |
DE3910739C3 (de) * | 1989-04-03 | 1996-11-21 | Deutsche Forsch Luft Raumfahrt | Verfahren zum Verallgemeinern des Viterbi-Algorithmus und Einrichtungen zur Durchführung des Verfahrens |
US5150369A (en) * | 1989-06-13 | 1992-09-22 | Costa Tony M | High-speed convolutional decoder |
US5111483A (en) * | 1989-08-07 | 1992-05-05 | Motorola, Inc. | Trellis decoder |
US5073940A (en) * | 1989-11-24 | 1991-12-17 | General Electric Company | Method for protecting multi-pulse coders from fading and random pattern bit errors |
GB2238692B (en) * | 1989-11-29 | 1993-12-01 | Technophone Ltd | Data symbol estimation |
US5097507A (en) * | 1989-12-22 | 1992-03-17 | General Electric Company | Fading bit error protection for digital cellular multi-pulse speech coder |
US5027374A (en) * | 1990-03-26 | 1991-06-25 | Motorola, Inc. | Bit serial Viterbi decoder add/compare/select array |
GB2246272B (en) * | 1990-07-19 | 1994-09-14 | Technophone Ltd | Maximum likelihood sequence detector |
GB2248999B (en) * | 1990-10-17 | 1994-09-21 | Racal Vodafone Ltd | Telecommunication networks |
US5230003A (en) * | 1991-02-08 | 1993-07-20 | Ericsson-Ge Mobile Communications Holding, Inc. | Decoding system for distinguishing different types of convolutionally-encoded signals |
NZ243768A (en) * | 1991-07-31 | 1995-04-27 | Telstra Corp Ltd | Radio telephone network access control according to identity of calling unit |
JP2876497B2 (ja) * | 1991-08-23 | 1999-03-31 | 松下電器産業株式会社 | 誤り訂正符復号化方法およびその装置 |
JP2768621B2 (ja) * | 1993-06-25 | 1998-06-25 | 沖電気工業株式会社 | 分散送信される畳み込み符号の復号装置 |
-
1993
- 1993-08-18 GB GB9317173A patent/GB2281179B/en not_active Revoked
-
1994
- 1994-07-09 EP EP19940110701 patent/EP0639913B1/en not_active Expired - Lifetime
- 1994-07-09 DE DE1994626004 patent/DE69426004T2/de not_active Expired - Fee Related
- 1994-07-09 ES ES94110701T patent/ES2151524T3/es not_active Expired - Lifetime
- 1994-08-18 CN CN94115047A patent/CN1052135C/zh not_active Expired - Fee Related
- 1994-08-18 JP JP19427894A patent/JPH0795254A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
GB9317173D0 (en) | 1993-10-06 |
CN1111048A (zh) | 1995-11-01 |
GB2281179A (en) | 1995-02-22 |
JPH0795254A (ja) | 1995-04-07 |
DE69426004T2 (de) | 2001-05-17 |
DE69426004D1 (de) | 2000-11-02 |
EP0639913A1 (en) | 1995-02-22 |
GB2281179B (en) | 1998-03-11 |
EP0639913B1 (en) | 2000-09-27 |
CN1052135C (zh) | 2000-05-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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