BR9713072A - Processo e equipamento para codificar uma pluralidade de sìmbolos de fonte para uso em um modulador de nìvel superior, e, processo e equipamento para decodificar uma pluralidade de sìmbolos de fonte que tenham sido modulados em um modulador de nìvel superior. - Google Patents

Processo e equipamento para codificar uma pluralidade de sìmbolos de fonte para uso em um modulador de nìvel superior, e, processo e equipamento para decodificar uma pluralidade de sìmbolos de fonte que tenham sido modulados em um modulador de nìvel superior.

Info

Publication number
BR9713072A
BR9713072A BR9713072-9A BR9713072A BR9713072A BR 9713072 A BR9713072 A BR 9713072A BR 9713072 A BR9713072 A BR 9713072A BR 9713072 A BR9713072 A BR 9713072A
Authority
BR
Brazil
Prior art keywords
symbols
equipment
level modulator
source symbols
higher level
Prior art date
Application number
BR9713072-9A
Other languages
English (en)
Inventor
Peter Schramm
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR9713072A publication Critical patent/BR9713072A/pt

Links

Classifications

    • 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
    • H04L1/0067—Rate matching
    • H04L1/0068—Rate matching by puncturing
    • 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
    • H03M13/27—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 using interleaving techniques
    • 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
    • H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
    • H03M13/356—Unequal error protection [UEP]
    • 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
    • H03M13/63—Joint error correction and other techniques
    • H03M13/635—Error control coding in combination with rate matching
    • H03M13/6362—Error control coding in combination with rate matching by puncturing
    • 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
    • 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
    • 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
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0086—Unequal error protection
    • 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
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
    • H04L27/3427—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
  • Error Detection And Correction (AREA)

Abstract

"PROCESSO E EQUIPAMENTO PARA CODIFICAR UMA PLURALIDADE DE SìMBOLOS DE FONTE PARA USO EM UM MODULADOR DE NìVEL SUPERIOR, E, PROCESSO E EQUIPAMENTO PARA DECODIFICAR UMA PLURALIDADE DE SìMBOLOS DE FONTE QUE TENHAM SIDO MODULADOS EM UM MODULADOR DE NìVEL SUPERIOR". Símbolos de fonte são codificados pela partição dos símbolos de fonte em um número de classes. Este princípio é aplicado em um número configurações alternativas de transmissor e receptor. Em uma configuração, um correspondente codificador é provido para cada uma das classes, e para cada classe, cada um dos símbolos de fonte é suprido ao codificador correspondente. Para cada codificador, símbolos codificados são supridos em uma saída de codificador e os símbolos codificados são particionados em um número e níveis associados com as classes correspondentes, onde pelo menos uma das classes possui pelo menos dois níveis designados a ela. Os símbolos codificados particionados são então supridos a um mapeador que gera sinais de coeficiente de amplitude. Receptores correspondentes executam operações inversas àquelas executadas pelos transmissores.
BR9713072-9A 1996-11-15 1997-11-13 Processo e equipamento para codificar uma pluralidade de sìmbolos de fonte para uso em um modulador de nìvel superior, e, processo e equipamento para decodificar uma pluralidade de sìmbolos de fonte que tenham sido modulados em um modulador de nìvel superior. BR9713072A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/749,229 US5812601A (en) 1996-11-15 1996-11-15 Coding for higher-level modulation
PCT/SE1997/001912 WO1998023073A1 (en) 1996-11-15 1997-11-13 Coded modulation for fading channels

Publications (1)

Publication Number Publication Date
BR9713072A true BR9713072A (pt) 2000-04-11

Family

ID=25012838

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9713072-9A BR9713072A (pt) 1996-11-15 1997-11-13 Processo e equipamento para codificar uma pluralidade de sìmbolos de fonte para uso em um modulador de nìvel superior, e, processo e equipamento para decodificar uma pluralidade de sìmbolos de fonte que tenham sido modulados em um modulador de nìvel superior.

Country Status (7)

Country Link
US (1) US5812601A (pt)
AU (1) AU5076598A (pt)
BR (1) BR9713072A (pt)
CA (1) CA2271768C (pt)
MY (1) MY120960A (pt)
TW (1) TW363319B (pt)
WO (1) WO1998023073A1 (pt)

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Also Published As

Publication number Publication date
CA2271768A1 (en) 1998-05-28
US5812601A (en) 1998-09-22
WO1998023073A1 (en) 1998-05-28
TW363319B (en) 1999-07-01
CA2271768C (en) 2005-05-24
AU5076598A (en) 1998-06-10
MY120960A (en) 2005-12-30

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B06A Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements