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
Application number
MX9604103A
Other languages
English (en)
Other versions
MXPA96004103A (es
Inventor
Kumar Ramaswamy
John Sidney Stewart
Original Assignee
Thomson Consumer Electronics
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Consumer Electronics filed Critical Thomson Consumer Electronics
Publication of MXPA96004103A publication Critical patent/MXPA96004103A/es
Publication of MX9604103A publication Critical patent/MX9604103A/es

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)
  • Circuits Of Receivers In General (AREA)
  • Color Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (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.
MX9604103A 1995-09-14 1996-09-13 Un desmapeador de entramado de un descodificador convolucional. MX9604103A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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
US08528370 1995-09-14

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)

* Cited by examiner, † Cited by third party
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
WO2000030311A1 (en) 1998-11-14 2000-05-25 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
US8369435B2 (en) * 2009-06-17 2013-02-05 Intersil Americas Inc. Frame structure for a QAM 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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN1150770C (zh) 2004-05-19
EP0763901A2 (en) 1997-03-19
CA2184437C (en) 2007-11-20
EP0763901A3 (en) 1999-02-03
AU6559596A (en) 1997-03-20
DE69633893T2 (de) 2005-12-01
CN1162238A (zh) 1997-10-15
ES2231797T3 (es) 2005-05-16
KR100455489B1 (ko) 2005-01-13
JP3760001B2 (ja) 2006-03-29
DE69633893D1 (de) 2004-12-30
AU702966B2 (en) 1999-03-11
IN190522B (es) 2003-08-09
SG93804A1 (en) 2003-01-21
MY113139A (en) 2001-11-30
TW318314B (es) 1997-10-21
CA2184437A1 (en) 1997-03-15
EP0763901B1 (en) 2004-11-24
HK1003696A1 (en) 1998-11-06
KR970019654A (ko) 1997-04-30
JPH09181785A (ja) 1997-07-11
BR9603743A (pt) 1998-06-02
US5740203A (en) 1998-04-14

Similar Documents

Publication Publication Date Title
MX9604103A (es) Un desmapeador de entramado de un descodificador convolucional.
CA2310183C (en) Apparatus for demodulating and decoding satellite, terrestrial, and cable transmitted digital television data
GB2253546B (en) Radio communication apparatus with stored coding/decoding procedures
Al-Semari et al. IQ TCM: Reliable communication over the Rayleigh fading channel close to the cutoff rate
EP2280494A3 (en) Method and apparatus for data transmission using multiple transmit antennas
HK1094840A1 (en) Multichannel viterbi decoder
CA2109410A1 (en) High Efficiency Dual Mode Power Amplifier Apparatus
MY120116A (en) Encoding mode control method and decoding mode determining apparatus
GB2413908A (en) Radio receiver supporting multiple modulation formats with a single pair of ADCs
ATE476019T1 (de) Amps-empfängersystem mit einer null-zf- architektur
CA2266108A1 (en) Iterative demapping
MXPA96004103A (es) Un desmapeador de entramado de un descodificadorconvolucional
AU4252897A (en) Convolutional decoding with the ending state decided by crc bits placed inside multiple coding bursts
NZ332260A (en) Message forwarding time and transmission link selected on basis of message priority code in store and forward messaging system
CA2078370A1 (en) Cellular radio communications system
WO2002009315A1 (fr) Appareil recepteur et procede de reception pour communication radio
MY137013A (en) Receiver decoder circuitry, and associated method, for decoding an encoded signal
TW350954B (en) An address processor and method therefor
TH27555B (th) ตัวลดการสร้างแบบไขว้ของตัวถอดรหัสแบบหมุนวนสำหรับการถอดรหัสของรหัส ที่มีการไขว้จริงที่เหมาะสำหรับใช้ในเครื่องรับแบบหลายช่องของข้อมูลโทรทัศน์แบบดิจิตอล ที่ถูกอัดที่มีการแก้ความผิดพลาดไปข้างหน้าที่ส่งผ่านดาวเทียมภาคพื้นดินและสาย
Chan et al. Performance of punctured trellis coded modulation over fading channels
Chan et al. High-rate punctured convolutional codes for trellis-coded modulation
GB2309347B (en) Tube type power amplifier with distortion control
Li et al. A class of block coded modulation schemes for satellite communications
Kojima On the Frontier of the Pressure-Induced Molecular Dissociation
Mizuta et al. Amiloride-sensitive Na+ channel-like immunoreactivity in the luminal membrane of some non-sensory epithelia of the inner ear (Hear. Res. 88 (1995) 199-205)