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1. WO1997034389 - EFFECTIVE BYPASS OF ERROR CONTROL DECODER IN A DIGITAL RADIO SYSTEM FOR TESTING OR UPGRADING EXISTING EQUIPMENT

Publication Number WO/1997/034389
Publication Date 18.09.1997
International Application No. PCT/US1997/003767
International Filing Date 11.03.1997
Chapter 2 Demand Filed 10.10.1997
IPC
H03M 13/01 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
13Coding, 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
01Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
H03M 13/39 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
13Coding, 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
37Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03-H03M13/35153
39Sequence estimation, i.e using statistical methods for the reconstruction of the original codes
H04L 1/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
CPC
H03M 13/01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
13Coding, 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
01Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
H03M 13/39
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
13Coding, 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
37Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
39Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
H04L 1/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
H04L 1/004
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
004by using forward error control
Applicants
  • ERICSSON INC. [US]/[US]
Inventors
  • RAMESH, Rajaram
  • KHAYRALLAH, Ali, S.
  • TOY, Raymond
Agents
  • FARIS, Robert, W.
Priority Data
08/614,31712.03.1996US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) EFFECTIVE BYPASS OF ERROR CONTROL DECODER IN A DIGITAL RADIO SYSTEM FOR TESTING OR UPGRADING EXISTING EQUIPMENT
(FR) CONTOURNEMENT EFFICACE D'UN DECODEUR DE LIMITATION D'ERREURS DANS UN SYSTEME RADIO NUMERIQUE, AUX FINS D'ESSAI OU D'AMELIORATION D'UN MATERIEL EXISTANT
Abstract
(EN) A digital radio communications system including a suboptional soft decision (e.g., errors and erasures) channel decoder and a speech decoder can be upgraded to effectively bypass the hard decision channel decoder and allow a higher performance soft decision (e.g., maximum likelihood sequence estimate (MLSE)) decoder to be used-- without requiring physical removal or disconnection of the hard decision channel decoder. The new decoder can feed the existing decoder the right choice of received vector r' to force the existing decoder to produce a certain codeword y' and a certain bit error estimate b'. This technique is useful to test new MLSE decoders on existing radios, or to add an MLSE decoder as an upgrade on existing receivers.
(FR) Il est possible de perfectionner un système de communications radioélectriques numériques comprenant un décodeur de canal à décisions pondérées sous-optimales (par exemple des erreurs ou effacements) ainsi qu'un décodeur de parole, en contournant efficacement le décodeur de canal à décisions fermes et en permettant l'utilisation d'un décodeur à décision pondérée (par exemple estimation de séquence par maximum de vraisemblance (MLSE)) et haute performance, sans qu'il soit nécessaire de déconnecter ou d'enlever physiquement le décodeur de canal à décisions fermes. Le nouveau décodeur peut fournir au décodeur existant le choix exact de vecteur r' reçu, afin de forcer le décodeur existant à produire un certain mot de code y' et une certaine estimation b' d'erreur de binaire. Cette technique est utile pour essayer des nouveaux décodeurs à MLSE sur des systèmes radioélectriques existants ou pour ajouter un décodeur à MLSE aux fins d'amélioration de récepteurs existants.
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