WO2002033919A3 - Verfahren zur erzeugung von soft-bit-informationen aus gray-codierten signalen - Google Patents

Verfahren zur erzeugung von soft-bit-informationen aus gray-codierten signalen Download PDF

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Publication number
WO2002033919A3
WO2002033919A3 PCT/DE2001/003917 DE0103917W WO0233919A3 WO 2002033919 A3 WO2002033919 A3 WO 2002033919A3 DE 0103917 W DE0103917 W DE 0103917W WO 0233919 A3 WO0233919 A3 WO 0233919A3
Authority
WO
WIPO (PCT)
Prior art keywords
soft bit
bit information
phase
channel
coded signals
Prior art date
Application number
PCT/DE2001/003917
Other languages
English (en)
French (fr)
Other versions
WO2002033919A2 (de
Inventor
Volker Aue
Rene Nuessgen
Original Assignee
Systemonic Ag
Volker Aue
Rene Nuessgen
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 Systemonic Ag, Volker Aue, Rene Nuessgen filed Critical Systemonic Ag
Priority to US10/399,184 priority Critical patent/US20040096007A1/en
Priority to AU2002218138A priority patent/AU2002218138A1/en
Priority to DE10194477T priority patent/DE10194477D2/de
Priority to JP2002536794A priority patent/JP2004512742A/ja
Priority to EP01987987A priority patent/EP1329070A2/de
Publication of WO2002033919A2 publication Critical patent/WO2002033919A2/de
Publication of WO2002033919A3 publication Critical patent/WO2002033919A3/de

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Classifications

    • 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
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/067—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Error Detection And Correction (AREA)

Abstract

Der Erfindung, die ein Verfahren zur Erzeugung von Soft-Bit-Informationen aus Gray-Codierten Signalen betrifft, liegt die Aufgabe zugrunde, die Soft-Bit-Informationen bei zumindest gleicher Performance bzgl. Bit- bzw. Symbolfehlerraten mit geringerem Rechen- und Hardwareaufwand zu berechnen, um eine entsprechende Implementierung in Echtzeitsystemen mit hohen Zeitanforderungen realisieren zu können. Diese Aufgabe wird dadurch gelöst, dass unter Nutzung der Gray-Codierung eine Generierung der Soft-Bit-Information pro Bit durch einfache Betragsbildung und Subtraktion erfolgt, wobei vor der eigentlichen Soft-Bit-Berechnung die komplexen Empfangssymbole Y mit Y = S.H+N, mit dem konjugiert komplexen Wert H* der Kanalübertragungsfunktion H multipliziert werden und damit eine durch den Kanal bedingte Phasendrehung eliminiert wird, das sich nach der komplexen Multiplikation und der Annahme idealer Kanalschätzung das in der Phase korrigierte und mit der Amplitude des Kanals gewichtete Empfangssymbol R = S.|H|2 + NH* ergibt, und das die Soft-Bit-Information D(R,S)¿i? für Inphase- bzw. Quadraturkomponten für ein m-wertiges QAM-Symbol nach D(R,S)1 = Re(R) für die Inphasenkomponenten und nach D(R,S)1 = Im(R) für die Quadraturkomponenten und D(R,S)i = -abs(D(R,S)i-1)+Si für i≥2, wobei Si Shiftfaktoren mit Si = VTi|H|?2¿ und V¿Ti? Schwellwerte mit Vti = 2?ld(m)/2-(i-1)¿ darstellen, berechnet werden.
PCT/DE2001/003917 2000-10-16 2001-10-15 Verfahren zur erzeugung von soft-bit-informationen aus gray-codierten signalen WO2002033919A2 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US10/399,184 US20040096007A1 (en) 2000-10-16 2001-10-15 Method for generating soft bit information from gray coded signals
AU2002218138A AU2002218138A1 (en) 2000-10-16 2001-10-15 Method for generating soft bit information from gray coded signals
DE10194477T DE10194477D2 (de) 2000-10-16 2001-10-15 Verfahren zur Erzeugung von Soft-Bit-Informationen aus Gray-Codierten Signalen
JP2002536794A JP2004512742A (ja) 2000-10-16 2001-10-15 グレイ符号化された信号からソフトビット情報を生成する方法
EP01987987A EP1329070A2 (de) 2000-10-16 2001-10-15 Verfahren zur erzeugung von soft-bit-informationen aus gray-codierten signalen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10051283.6 2000-10-16
DE10051283 2000-10-16

Publications (2)

Publication Number Publication Date
WO2002033919A2 WO2002033919A2 (de) 2002-04-25
WO2002033919A3 true WO2002033919A3 (de) 2002-08-29

Family

ID=7659994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/003917 WO2002033919A2 (de) 2000-10-16 2001-10-15 Verfahren zur erzeugung von soft-bit-informationen aus gray-codierten signalen

Country Status (6)

Country Link
US (1) US20040096007A1 (de)
EP (1) EP1329070A2 (de)
JP (1) JP2004512742A (de)
AU (1) AU2002218138A1 (de)
DE (1) DE10194477D2 (de)
WO (1) WO2002033919A2 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030017886A (ko) * 2001-08-23 2003-03-04 한국전자통신연구원 비트 단위 복호를 위한 소프트 비트 값 산출 방법 및 이방법을 사용하는 통신 시스템
DE10260348A1 (de) * 2002-12-20 2004-07-15 Ingenieurbüro Ludwig Schäffler Verfahren und Vorrichtung zum Soft-Decodieren einer Folge von Nutzdaten-Bits, Signalempfangs- und -decodiereinrichtung und Telekomunikationseinreinrichtung
EP1654847B1 (de) * 2003-06-23 2016-10-12 Seo, Hong-Seok Soft-decision-verfahren zur demodulation von qam-signalen und dazugehörige vorrichtung
US7154966B2 (en) 2003-06-30 2006-12-26 Telefonaktiebolaget L M Ericsson (Publ) Method and system for M-QAM detection in communication systems
US7502426B2 (en) * 2003-09-09 2009-03-10 Interdigital Technology Corporation Method for estimating signal magnitude, noise power, and signal-to-noise ratio of received signals
US20060029162A1 (en) * 2004-08-06 2006-02-09 Stmicroelectronics, Inc. Modular multi-bit symbol demapper
TWI387274B (zh) * 2005-12-07 2013-02-21 Hong-Seok Seo 使用軟性決策用於正交振幅調變之調解變方法及其裝置
US7844879B2 (en) * 2006-01-20 2010-11-30 Marvell World Trade Ltd. Method and system for error correction in flash memory
US7912140B2 (en) * 2007-03-26 2011-03-22 Lantiq Israel Ltd. Reducing computational complexity in maximum likelihood MIMO OFDM decoder
US8340202B2 (en) 2010-03-11 2012-12-25 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient soft modulation for gray-mapped QAM symbols

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6078626A (en) * 1997-09-24 2000-06-20 Ericsson Inc. Methods and systems for communicating information using separable modulation constellations
DE19912825C1 (de) * 1999-03-22 2000-08-10 Siemens Ag Verfahren, Empfangseinrichtung und Funkstation zum Detektieren eines Datensymbols

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6977972B1 (en) * 2000-07-12 2005-12-20 Sharp Laboratories Of America, Inc. Method of hybrid soft/hard decision demodulation of signals with multilevel modulation
MXPA02009140A (es) * 2001-01-16 2005-07-01 Koninkl Philips Electronics Nv Trazo de un mapa de una modulacion codificada con interhoja de bit (bicm).

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6078626A (en) * 1997-09-24 2000-06-20 Ericsson Inc. Methods and systems for communicating information using separable modulation constellations
DE19912825C1 (de) * 1999-03-22 2000-08-10 Siemens Ag Verfahren, Empfangseinrichtung und Funkstation zum Detektieren eines Datensymbols

Also Published As

Publication number Publication date
AU2002218138A1 (en) 2002-04-29
US20040096007A1 (en) 2004-05-20
DE10194477D2 (de) 2003-10-30
JP2004512742A (ja) 2004-04-22
EP1329070A2 (de) 2003-07-23
WO2002033919A2 (de) 2002-04-25

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