MX9604103A - Un desmapeador de entramado de un descodificador convolucional. - Google Patents
Un desmapeador de entramado de un descodificador convolucional.Info
- Publication number
- MX9604103A MX9604103A MX9604103A MX9604103A MX9604103A MX 9604103 A MX9604103 A MX 9604103A MX 9604103 A MX9604103 A MX 9604103A MX 9604103 A MX9604103 A MX 9604103A MX 9604103 A MX9604103 A MX 9604103A
- Authority
- MX
- Mexico
- Prior art keywords
- trellis
- demapper
- channel
- psk
- qam
- Prior art date
Links
Classifications
-
- 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
-
- 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]
Landscapes
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Error Detection And Correction (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Color Television Systems (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
El desmapeador de entramado que es capaz de remapear codigos de entramado 8-PSK y QAM 16, 32, 64, 128 y 256, comprende memorias RAN de canal 1, de canal Q y de remapeador, un medio logico de desmapeador 8-PSK y un selector de multiplexor (MUX). Cada una de las memorias RAN incluye una tabla de consulta que se programa selectivamente para cada uno de los codigos QAM. La RAM (400) de canal I y la RAM (402) de canal Q, cada una de las cuales tiene una capacidad de almacenamiento de 768 bitios, envía directamente sus salidas respectivas a través del selector de MUX (408) como la salida que se selecciona del desmapeador de entramado (406) en respuesta a un codigo de entramado QAM que es una potencia par de 2 (es decir, 16, 64 o 256). En respuesta a un codigo de entramado QAM que es una potencia impar de 2 (es decir, 32 o 128), que se selecciona, las salidas respectivas de la RAN de canal 1 y la RAM de canal Q se aplican como entradas a la RAM (404) de remapeador, que tiene una capacidad de almacenamiento de 320 bitios y la salida de la RAM de remapeador es enviada a través del selector de MUX como la salida de desmapeador de entramado. En respuesta a un codigo de entramado 8-PSK que se selecciona, la salida del medio logico de desmapeador 8-PSK es enviada a través del selector de MUX como la salida de desmapeador de entramado. Esta configuracion es estructuralmente eficiente y exige requerimientos de almacenamiento mínimos en comparacion con un desmapeador de codigo de entramado que emplea almacenamiento de ROM para los codigos de entramado de QAM 16, 32, 64, 128 y 256 y los codigos de entramado de 8-PSk.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08528370 | 1995-09-14 | ||
US08/528,370 US5740203A (en) | 1995-09-14 | 1995-09-14 | Trellis demapper of a convolutional decoder for decoding pragmatic trellis codes suitable for use in a multi-channel receiver of satellite, terrestrial and cable transmitted FEC compressed-digital television data |
Publications (2)
Publication Number | Publication Date |
---|---|
MXPA96004103A MXPA96004103A (es) | 1997-08-01 |
MX9604103A true MX9604103A (es) | 1997-08-30 |
Family
ID=24105413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX9604103A MX9604103A (es) | 1995-09-14 | 1996-09-13 | Un desmapeador de entramado de un descodificador convolucional. |
Country Status (16)
Country | Link |
---|---|
US (1) | US5740203A (es) |
EP (1) | EP0763901B1 (es) |
JP (1) | JP3760001B2 (es) |
KR (1) | KR100455489B1 (es) |
CN (1) | CN1150770C (es) |
AU (1) | AU702966B2 (es) |
BR (1) | BR9603743A (es) |
CA (1) | CA2184437C (es) |
DE (1) | DE69633893T2 (es) |
ES (1) | ES2231797T3 (es) |
HK (1) | HK1003696A1 (es) |
IN (1) | IN190522B (es) |
MX (1) | MX9604103A (es) |
MY (1) | MY113139A (es) |
SG (1) | SG93804A1 (es) |
TW (1) | TW318314B (es) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19529982A1 (de) * | 1995-08-16 | 1997-02-20 | Bosch Gmbh Robert | Verfahren zur Synchronisation |
US5995551A (en) * | 1997-08-15 | 1999-11-30 | Sicom, Inc. | Rotationally invariant pragmatic trellis coded digital communication system and method therefor |
US6078625A (en) * | 1997-10-20 | 2000-06-20 | Sicom, Inc. | Pragmatic decoder and method therefor |
US6738949B2 (en) * | 1998-05-13 | 2004-05-18 | Matsushita Electric Industrial Co., Ltd. | Error correction circuit and error correction method |
US6195778B1 (en) | 1998-07-30 | 2001-02-27 | Lsi Logic Corp. | Demodulation of DVD codewords using dependency-sorted tables for duplicate/dependent and unique/non-dependent mappings |
US20010028630A1 (en) * | 1998-11-09 | 2001-10-11 | Doron Burshtein | Methods and apparatus for robust and low-complexity QAM modulation |
US7016428B1 (en) | 1998-11-14 | 2006-03-21 | Stmicroelectronics Asia Pacific Pte Ltd. | Methods of efficient implementation of trellis based spectral shaping with lookahead |
KR100398969B1 (ko) * | 1999-06-08 | 2003-09-19 | 주식회사 대우일렉트로닉스 | Tcm 디코더용 256-qam 브랜치 매트릭 회로 |
US7263141B1 (en) * | 1999-06-09 | 2007-08-28 | Thomson Licensing | Code mapping in a trellis decoder |
US6680986B1 (en) * | 1999-11-22 | 2004-01-20 | Intelsat Global Service Corporation | Method for implementing shared channel decoder for onboard processing satellites |
KR100332805B1 (ko) * | 2000-02-29 | 2002-04-18 | 구자홍 | 직렬 연쇄 컨벌루션 부호화 장치 및 부호화/복호화 방법 |
KR20010094694A (ko) * | 2000-04-06 | 2001-11-01 | 윤종용 | 티시엠 복호장치 및 방법 |
US20020051501A1 (en) * | 2000-04-28 | 2002-05-02 | Victor Demjanenko | Use of turbo-like codes for QAM modulation using independent I and Q decoding techniques and applications to xDSL systems |
US6745366B1 (en) * | 2000-11-21 | 2004-06-01 | Daewoo Electronics Corporation | Error correcting method and apparatus for N:N+1 channel codes |
WO2003043283A1 (fr) * | 2001-11-14 | 2003-05-22 | Linkair Communications, Inc. | Procede de modulation d'amplitude en quadrature utilise dans un systeme de communication mobile numerique |
KR100454398B1 (ko) * | 2001-12-28 | 2004-10-26 | 한국전자통신연구원 | 적응형 모뎀 장치 및, 이에 적용되는 프래그머틱 복호기및 복호 방법 |
US7020223B2 (en) | 2002-04-16 | 2006-03-28 | Intel Corporation | Viterbi decoder and method using sequential two-way add-compare-select operations |
US7046747B2 (en) * | 2002-04-16 | 2006-05-16 | Intel Corporation | Viterbi decoder and decoding method using rescaled branch metrics in add-compare-select operations |
CN1320794C (zh) * | 2002-11-13 | 2007-06-06 | 上海芯华微电子有限公司 | 收缩卷积编码的单步方法和装置 |
TWI271933B (en) * | 2005-06-07 | 2007-01-21 | Realtek Semiconductor Corp | Quadrature amplitude modulation trellis coded modulation decoding apparatus and method thereof |
US8098773B1 (en) | 2005-09-19 | 2012-01-17 | Piesinger Gregory H | Communication method and apparatus |
KR100706618B1 (ko) | 2005-12-09 | 2007-04-12 | 한국전자통신연구원 | 반복 복호기를 위한 고차변조 방식에 적합한 연판정 디매핑방법 및 그를 이용한 오류 정정 장치 |
US7634000B1 (en) | 2006-05-22 | 2009-12-15 | Redpine Signals, Inc. | Noise estimator for a communications system |
US8374270B2 (en) * | 2009-06-17 | 2013-02-12 | Intersil Americas Inc. | Constellation detection in a multi-mode QAM communications system |
US10853609B2 (en) | 2019-03-12 | 2020-12-01 | Microsoft Technology Licensing, Llc | Hybrid two-dimensional barcode reader |
US10650208B1 (en) | 2019-03-12 | 2020-05-12 | Microsoft Technology Licensing, Llc | Hybrid two-dimensional barcode and hybrid two-dimensional barcode generator |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH609510A5 (es) * | 1976-06-18 | 1979-02-28 | Ibm | |
GB2088676B (en) * | 1980-11-14 | 1985-09-04 | Plessey Co Ltd | Transmission systems |
US4713817A (en) * | 1985-04-25 | 1987-12-15 | Codex Corporation | Multidimensional, convolutionally coded communication systems |
US4866395A (en) * | 1988-11-14 | 1989-09-12 | Gte Government Systems Corporation | Universal carrier recovery and data detection for digital communication systems |
US5233630A (en) * | 1991-05-03 | 1993-08-03 | Qualcomm Incorporated | Method and apparatus for resolving phase ambiguities in trellis coded modulated data |
US5233629A (en) * | 1991-07-26 | 1993-08-03 | General Instrument Corporation | Method and apparatus for communicating digital data using trellis coded qam |
US5469452A (en) * | 1991-09-27 | 1995-11-21 | Qualcomm Incorporated | Viterbi decoder bit efficient chainback memory method and decoder incorporating same |
US5363408A (en) * | 1992-03-24 | 1994-11-08 | General Instrument Corporation | Mode selective quadrature amplitude modulation communication system |
US5848102A (en) * | 1993-06-04 | 1998-12-08 | Qualcomm Incorporated | Method and apparatus for encoding/decoding QAM trellis coded data |
US5651032A (en) * | 1993-11-04 | 1997-07-22 | Kabushiki Kaisha Toshiba | Apparatus and method for trellis decoder |
US5511096A (en) * | 1994-01-18 | 1996-04-23 | Gi Corporation | Quadrature amplitude modulated data for standard bandwidth television channel |
KR0129577B1 (ko) * | 1994-04-30 | 1998-04-10 | 배순훈 | 32-직각진폭변조방식을 이용하는 영상수신시스템에서 개선된 메트릭 계산방법 |
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 |
CA2161467C (en) * | 1994-11-18 | 2001-01-30 | Kumar Ramaswamy | Apparatus for demodulating and decoding satellite, terrestrial and cable transmitted digital television data |
-
1995
- 1995-09-14 US US08/528,370 patent/US5740203A/en not_active Expired - Lifetime
-
1996
- 1996-08-29 CA CA002184437A patent/CA2184437C/en not_active Expired - Fee Related
- 1996-08-29 IN IN1547CA1996 patent/IN190522B/en unknown
- 1996-08-30 TW TW085110570A patent/TW318314B/zh not_active IP Right Cessation
- 1996-09-09 ES ES96114383T patent/ES2231797T3/es not_active Expired - Lifetime
- 1996-09-09 EP EP96114383A patent/EP0763901B1/en not_active Expired - Lifetime
- 1996-09-09 DE DE69633893T patent/DE69633893T2/de not_active Expired - Lifetime
- 1996-09-12 BR BR9603743A patent/BR9603743A/pt not_active IP Right Cessation
- 1996-09-12 SG SG9610629A patent/SG93804A1/en unknown
- 1996-09-12 MY MYPI96003778A patent/MY113139A/en unknown
- 1996-09-13 CN CNB961220562A patent/CN1150770C/zh not_active Expired - Fee Related
- 1996-09-13 KR KR1019960039601A patent/KR100455489B1/ko not_active IP Right Cessation
- 1996-09-13 MX MX9604103A patent/MX9604103A/es unknown
- 1996-09-13 AU AU65595/96A patent/AU702966B2/en not_active Ceased
- 1996-09-17 JP JP24502396A patent/JP3760001B2/ja not_active Expired - Fee Related
-
1998
- 1998-04-03 HK HK98102841A patent/HK1003696A1/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CA2184437C (en) | 2007-11-20 |
HK1003696A1 (en) | 1998-11-06 |
CN1162238A (zh) | 1997-10-15 |
EP0763901B1 (en) | 2004-11-24 |
AU6559596A (en) | 1997-03-20 |
KR100455489B1 (ko) | 2005-01-13 |
TW318314B (es) | 1997-10-21 |
MY113139A (en) | 2001-11-30 |
EP0763901A2 (en) | 1997-03-19 |
EP0763901A3 (en) | 1999-02-03 |
AU702966B2 (en) | 1999-03-11 |
DE69633893D1 (de) | 2004-12-30 |
JPH09181785A (ja) | 1997-07-11 |
SG93804A1 (en) | 2003-01-21 |
IN190522B (es) | 2003-08-09 |
BR9603743A (pt) | 1998-06-02 |
ES2231797T3 (es) | 2005-05-16 |
JP3760001B2 (ja) | 2006-03-29 |
DE69633893T2 (de) | 2005-12-01 |
CN1150770C (zh) | 2004-05-19 |
KR970019654A (ko) | 1997-04-30 |
CA2184437A1 (en) | 1997-03-15 |
US5740203A (en) | 1998-04-14 |
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