ES2172487T1 - Un decodificador viterbi de canales multiples. - Google Patents
Un decodificador viterbi de canales multiples.Info
- Publication number
- ES2172487T1 ES2172487T1 ES01120762T ES01120762T ES2172487T1 ES 2172487 T1 ES2172487 T1 ES 2172487T1 ES 01120762 T ES01120762 T ES 01120762T ES 01120762 T ES01120762 T ES 01120762T ES 2172487 T1 ES2172487 T1 ES 2172487T1
- Authority
- ES
- Spain
- Prior art keywords
- kbps
- communication
- viterbi
- rate
- channel decoder
- 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.)
- Granted
Links
Classifications
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- 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
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
- H04L1/006—Trellis-coded modulation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
- H03M13/256—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] with trellis coding, e.g. with convolutional codes and TCM
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
- H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
- H03M13/4107—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing add, compare, select [ACS] operations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
- H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
- H03M13/4161—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing path management
- H03M13/4169—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing path management using traceback
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6502—Reduction of hardware complexity or efficient processing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6502—Reduction of hardware complexity or efficient processing
- H03M13/6505—Memory efficient implementations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6569—Implementation on processors, e.g. DSPs, or software implementations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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- 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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- 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
- H04L1/0046—Code rate detection or code type detection
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- 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
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
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- 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
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
- H04L1/0053—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables specially adapted for power saving
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- 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
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- 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
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
-
- 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
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- 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
- H04L1/0075—Transmission of coding parameters to receiver
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- 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
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0262—Arrangements for detecting the data rate of an incoming signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70703—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03592—Adaptation methods
- H04L2025/03598—Algorithms
- H04L2025/03675—Blind algorithms using gradient methods
Abstract
Un método para recibir simultáneamente una pluralidad de señales de canal en un espectro compartido de un sistema de comunicación inalámbrico de acceso múltiple de división de código de amplio espectro, transmitiendo el sistema las señales del canal que utilizan modulación por desplazamiento de fase en cuadratura, teniendo las señales del canal velocidades de datos diferentes y una misma velocidad de datos de transmisión, comprendiendo el método: - recibir las señales transmitidas sobre el espectro compartido; - demodular las señales recibidas para producir una señal de frecuencia intermedia en fase y una señal de frecuencia intermedia de fase en cuadratura; - despropagar con un código asociado con cada señal del canal las señales de frecuencia intermedia en fase y de fase en cuadratura para producir una señal de fase en fase despropagada y de fase en cuadratura despropagada para cada señal del canal; teniendo para cada señal del canal su velocidad de datos por debajo de la velocidad de datos de transmisión, combinando los símbolos recibidos de las señales despropagadas en fase y de fase en cuadratura, de forma que después de la combinación de estas señales de fase en fase y de fase en cuadratura despropagadas en el canal tienen esta velocidad de datos del canal; y procesar simultáneamente cada una de las señales despropagadas de fase en fase y de fase en cuadratura de la señal del canal después de la combinación para recuperar los datos para cada señal del canal.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4047797P | 1997-03-12 | 1997-03-12 | |
US40477P | 1997-03-12 | ||
US08/871,008 US6005898A (en) | 1997-03-12 | 1997-06-06 | Multichannel viterbi decoder |
US871008 | 1997-06-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2172487T1 true ES2172487T1 (es) | 2002-10-01 |
ES2172487T3 ES2172487T3 (es) | 2004-12-16 |
Family
ID=26717094
Family Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES06012665T Expired - Lifetime ES2300083T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador de viterbi multicanal. |
ES01120763T Expired - Lifetime ES2172488T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador de viterbi multicanal. |
ES04009884T Expired - Lifetime ES2268532T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador viterbi multicanal. |
ES01120761T Expired - Lifetime ES2172486T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador de viterbi multicanal. |
ES07025032T Expired - Lifetime ES2386278T3 (es) | 1997-03-12 | 1998-03-04 | Método y aparato para la adaptación de la velocidad de datos en un sistema de comunicación de AMDC |
ES98908938T Expired - Lifetime ES2146560T3 (es) | 1997-03-12 | 1998-03-04 | Sistema de comunicaciones multicanal con decodificador. |
ES01120762T Expired - Lifetime ES2172487T3 (es) | 1997-03-12 | 1998-03-04 | Sistema de comunicaciones multicanal con decodificador. |
ES10179535T Expired - Lifetime ES2387708T3 (es) | 1997-03-12 | 1998-03-04 | Método y aparato para comunicación inalámbrica |
Family Applications Before (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES06012665T Expired - Lifetime ES2300083T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador de viterbi multicanal. |
ES01120763T Expired - Lifetime ES2172488T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador de viterbi multicanal. |
ES04009884T Expired - Lifetime ES2268532T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador viterbi multicanal. |
ES01120761T Expired - Lifetime ES2172486T3 (es) | 1997-03-12 | 1998-03-04 | Descodificador de viterbi multicanal. |
ES07025032T Expired - Lifetime ES2386278T3 (es) | 1997-03-12 | 1998-03-04 | Método y aparato para la adaptación de la velocidad de datos en un sistema de comunicación de AMDC |
ES98908938T Expired - Lifetime ES2146560T3 (es) | 1997-03-12 | 1998-03-04 | Sistema de comunicaciones multicanal con decodificador. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES10179535T Expired - Lifetime ES2387708T3 (es) | 1997-03-12 | 1998-03-04 | Método y aparato para comunicación inalámbrica |
Country Status (10)
Country | Link |
---|---|
US (2) | US6005898A (es) |
EP (8) | EP1696584B1 (es) |
JP (1) | JP3988956B2 (es) |
CN (2) | CN1278498C (es) |
AT (7) | ATE272271T1 (es) |
DE (7) | DE69825328T2 (es) |
DK (6) | DK1696584T3 (es) |
ES (8) | ES2300083T3 (es) |
HK (7) | HK1024357A1 (es) |
WO (1) | WO1998040971A1 (es) |
Families Citing this family (28)
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US6404828B2 (en) * | 1997-03-12 | 2002-06-11 | Interdigital Technology Corporation | Multichannel decoder |
US20060262832A1 (en) * | 1997-03-12 | 2006-11-23 | Interdigital Technology Corporation | Convolutionally encoding and decoding multiple data streams |
US6301683B1 (en) * | 1997-06-09 | 2001-10-09 | Vocal Technologies, Ltd. | Trellis encoding technique for PCM modems |
US6400966B1 (en) * | 1997-10-07 | 2002-06-04 | Telefonaktie Bolaget Lm Ericsson (Publ) | Base station architecture for a mobile communications system |
US6259687B1 (en) * | 1997-10-31 | 2001-07-10 | Interdigital Technology Corporation | Communication station with multiple antennas |
US6112325A (en) * | 1998-01-23 | 2000-08-29 | Dspc Technologies, Ltd. | Method and device for detecting rate |
JP4048510B2 (ja) * | 1998-03-05 | 2008-02-20 | 富士通株式会社 | Cdma移動通信システムにおける無線基地局 |
FI104774B (fi) * | 1998-03-23 | 2000-03-31 | Nokia Networks Oy | Menetelmä ja laitteisto modulaation ilmaisemiseksi |
US6269130B1 (en) * | 1998-08-04 | 2001-07-31 | Qualcomm Incorporated | Cached chainback RAM for serial viterbi decoder |
US6735724B1 (en) * | 1999-04-08 | 2004-05-11 | Texas Instruments Incorporated | Detection error estimation and method |
US8050198B2 (en) | 1999-05-24 | 2011-11-01 | Qualcomm Incorporated | Method and system for scheduling data transmission in communication systems |
KR100346152B1 (ko) | 1999-09-17 | 2002-08-01 | 주식회사 하이닉스반도체 | 코드 분할 다중 접속방식의 이동통신 기지국 시스템 |
RU2002123884A (ru) * | 2000-03-08 | 2004-03-10 | Арм Лимитед (Gb) | Декодирование витерби с обновлением метрики пути, выполняемым в порядке расположения битовых сегментов |
US20020031195A1 (en) * | 2000-09-08 | 2002-03-14 | Hooman Honary | Method and apparatus for constellation decoder |
KR100940461B1 (ko) * | 2001-06-21 | 2010-02-04 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 무선 통신 네트워크에서의 다중 입력 다중 출력 송신 시스템 |
JP3612563B2 (ja) * | 2001-09-07 | 2005-01-19 | 独立行政法人情報通信研究機構 | マルチモードブロック符号化変調復調方法 |
US7321618B2 (en) * | 2002-04-09 | 2008-01-22 | Texas Instruments Incorporated | PCM upstream data transmission server |
US7046747B2 (en) * | 2002-04-16 | 2006-05-16 | Intel Corporation | Viterbi decoder and decoding method using rescaled branch metrics in add-compare-select operations |
CN100399706C (zh) * | 2002-08-14 | 2008-07-02 | 联发科技股份有限公司 | 部分响应最大可能性信道的维特比译码器 |
US7295622B2 (en) * | 2003-05-09 | 2007-11-13 | Texas Instruments Incorporated | System and method for information decoding using batched processing of independent parameters |
US7117427B2 (en) * | 2003-07-09 | 2006-10-03 | Texas Instruments Incorporated | Reduced complexity decoding for trellis coded modulation |
EP1511178A1 (en) * | 2003-09-01 | 2005-03-02 | Alcatel | A method of decoding a data word |
US7434148B2 (en) * | 2004-12-30 | 2008-10-07 | Freescale Semiconductor, Inc. | Track buffer in a parallel decoder |
JP2007300400A (ja) * | 2006-04-28 | 2007-11-15 | Matsushita Electric Ind Co Ltd | 送信回路、送信方法、及びそれを用いた通信機器 |
US8165224B2 (en) * | 2007-03-22 | 2012-04-24 | Research In Motion Limited | Device and method for improved lost frame concealment |
WO2009149748A1 (en) * | 2008-06-10 | 2009-12-17 | Telefonaktiebolaget Lm Ericsson (Publ) | Continuous parallel viterbi decoder |
US8477879B2 (en) * | 2009-12-23 | 2013-07-02 | Texas Instruments Incorporated | System and method for bi-phase modulation decoding |
RU2421900C1 (ru) | 2010-02-27 | 2011-06-20 | Тимур Георгиевич Келин | Многоканальный последовательный декодер витерби |
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JPH0626346B2 (ja) * | 1990-04-26 | 1994-04-06 | 郵政省通信総合研究所長 | 畳込み符号化直交fm・ビタビ受信方式 |
US5511073A (en) * | 1990-06-25 | 1996-04-23 | Qualcomm Incorporated | Method and apparatus for the formatting of data for transmission |
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US5103459B1 (en) * | 1990-06-25 | 1999-07-06 | Qualcomm Inc | System and method for generating signal waveforms in a cdma cellular telephone system |
JP2554219B2 (ja) * | 1991-11-26 | 1996-11-13 | 日本電信電話株式会社 | ディジタル信号の重畳伝送方式 |
US5559757A (en) * | 1991-12-18 | 1996-09-24 | Catipovic; Josko A. | Spatial diversity processing for underwater acoustic telemetry |
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JP2701761B2 (ja) * | 1994-11-02 | 1998-01-21 | 日本電気株式会社 | 送信ビットレート判別方法及び装置 |
JP2605641B2 (ja) * | 1994-11-14 | 1997-04-30 | 日本電気株式会社 | 可変ビットレート判別方法及び装置 |
US5497401A (en) * | 1994-11-18 | 1996-03-05 | Thomson Consumer Electronics, Inc. | Branch metric computer for a Viterbi decoder of a punctured and pragmatic trellis code convolutional decoder suitable for use in a multi-channel receiver of satellite, terrestrial and cable transmitted FEC compressed-digital television data |
JP3169522B2 (ja) * | 1995-01-19 | 2001-05-28 | 沖電気工業株式会社 | データ受信装置 |
TW347616B (en) * | 1995-03-31 | 1998-12-11 | Qualcomm Inc | Method and apparatus for performing fast power control in a mobile communication system a method and apparatus for controlling transmission power in a mobile communication system is disclosed. |
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1997
- 1997-06-06 US US08/871,008 patent/US6005898A/en not_active Expired - Lifetime
-
1998
- 1998-03-04 EP EP06012665A patent/EP1696584B1/en not_active Expired - Lifetime
- 1998-03-04 DE DE69825328T patent/DE69825328T2/de not_active Expired - Lifetime
- 1998-03-04 DE DE69807850T patent/DE69807850T2/de not_active Expired - Lifetime
- 1998-03-04 ES ES06012665T patent/ES2300083T3/es not_active Expired - Lifetime
- 1998-03-04 DK DK06012665T patent/DK1696584T3/da active
- 1998-03-04 EP EP01120763A patent/EP1161019B1/en not_active Expired - Lifetime
- 1998-03-04 EP EP10179535A patent/EP2259440B1/en not_active Expired - Lifetime
- 1998-03-04 AT AT01120762T patent/ATE272271T1/de not_active IP Right Cessation
- 1998-03-04 EP EP01120762A patent/EP1161018B1/en not_active Expired - Lifetime
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