DE112009000636T8 - Verfahren und Vorrichtung zur Durchführung von Log-Likelihood-Berechnungen - Google Patents

Verfahren und Vorrichtung zur Durchführung von Log-Likelihood-Berechnungen Download PDF

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Publication number
DE112009000636T8
DE112009000636T8 DE112009000636T DE112009000636T DE112009000636T8 DE 112009000636 T8 DE112009000636 T8 DE 112009000636T8 DE 112009000636 T DE112009000636 T DE 112009000636T DE 112009000636 T DE112009000636 T DE 112009000636T DE 112009000636 T8 DE112009000636 T8 DE 112009000636T8
Authority
DE
Germany
Prior art keywords
log likelihood
performing log
likelihood calculations
calculations
log
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE112009000636T
Other languages
English (en)
Other versions
DE112009000636T5 (de
Inventor
David F. Chappaz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Technologies International Ltd
Original Assignee
Cambridge Silicon Radio Ltd
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 Cambridge Silicon Radio Ltd filed Critical Cambridge Silicon Radio Ltd
Publication of DE112009000636T5 publication Critical patent/DE112009000636T5/de
Application granted granted Critical
Publication of DE112009000636T8 publication Critical patent/DE112009000636T8/de
Expired - Fee Related legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • 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
    • H04L27/38—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Error Detection And Correction (AREA)
DE112009000636T 2008-03-18 2009-03-17 Verfahren und Vorrichtung zur Durchführung von Log-Likelihood-Berechnungen Expired - Fee Related DE112009000636T8 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0805054.4 2008-03-18
GBGB0805054.4A GB0805054D0 (en) 2008-03-18 2008-03-18 Method and apparatus for performing log-likelihood calculations
PCT/GB2009/000721 WO2009115795A2 (en) 2008-03-18 2009-03-17 Method and apparatus for performing log- likelihood calculations

Publications (2)

Publication Number Publication Date
DE112009000636T5 DE112009000636T5 (de) 2011-02-17
DE112009000636T8 true DE112009000636T8 (de) 2011-06-01

Family

ID=39328374

Family Applications (1)

Application Number Title Priority Date Filing Date
DE112009000636T Expired - Fee Related DE112009000636T8 (de) 2008-03-18 2009-03-17 Verfahren und Vorrichtung zur Durchführung von Log-Likelihood-Berechnungen

Country Status (4)

Country Link
US (1) US8457184B2 (de)
DE (1) DE112009000636T8 (de)
GB (1) GB0805054D0 (de)
WO (1) WO2009115795A2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5397469B2 (ja) * 2009-06-03 2014-01-22 日本電気株式会社 尤度値算出装置、尤度値算出方法および無線システム
EP2779552A1 (de) * 2013-03-14 2014-09-17 BlackBerry Limited Berechnung von Zuverlässigkeitswerten
US9112754B2 (en) * 2013-10-08 2015-08-18 Freescale Semiconductor, Inc. Techniques for generating bit log-likelihood ratios in communication systems using differential modulation
JP2016006613A (ja) * 2014-06-20 2016-01-14 ソニー株式会社 情報処理装置、情報処理方法及びプログラム
JP6510058B2 (ja) * 2015-10-22 2019-05-08 株式会社東芝 非均一なｑａｍ信号の復調
US9967057B1 (en) 2016-11-07 2018-05-08 Xilinx, Inc. System and method for computing log likelihood ratios
CN109962875B (zh) * 2017-12-22 2023-03-28 海思光电子有限公司 信号处理方法、装置及存储介质
CN114285524B (zh) * 2021-12-24 2024-01-23 北京中科晶上科技股份有限公司 Llr矢量量化的计算方法、装置与通信系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529559B2 (en) * 2001-01-12 2003-03-04 Comsys Communication & Signal Processing Ltd. Reduced soft output information packet selection
US6834088B2 (en) * 2001-03-12 2004-12-21 Motorola, Inc. Method and apparatus for calculating bit log-likelihood ratios for QAM signals
US6993098B2 (en) 2001-07-12 2006-01-31 Koninklijke Philips Electronics N.V. Method and apparatus for efficient calculating distance metric
FR2893433B1 (fr) * 2005-11-16 2008-06-27 Commissariat Energie Atomique Procedes et dispositifs de demodulation souple dans un systeme ofdm-cdma.
KR100758306B1 (ko) * 2005-12-08 2007-09-12 한국전자통신연구원 소프트 비트 매트릭 발생 장치 및 그 방법과 그를 이용한다치 레벨 ｑａｍ 수신시스템
KR100866805B1 (ko) 2006-04-06 2008-11-04 삼성전자주식회사 다중 안테나 통신시스템에서 로그 우도 율 생성 장치 및방법
US8166379B1 (en) * 2006-11-03 2012-04-24 Marvell International Ltd. Calculating soft information from a multi-level modulation signal
GB2447080B8 (en) 2007-03-01 2011-08-03 Artimi Inc Signal decoding systems
US8023578B2 (en) * 2008-03-12 2011-09-20 Nec Laboratories America, Inc. Two-stage low-complexity max-log bit-level LLR calculator and method

Also Published As

Publication number Publication date
DE112009000636T5 (de) 2011-02-17
WO2009115795A2 (en) 2009-09-24
US20110019726A1 (en) 2011-01-27
WO2009115795A3 (en) 2010-01-21
GB0805054D0 (en) 2008-04-16
US8457184B2 (en) 2013-06-04

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8696 Reprint of erroneous front page
OP8 Request for examination as to paragraph 44 patent law
R082 Change of representative

Representative=s name: KOTITSCHKE & HEURUNG PARTNERSCHAFT MBB PATENT-, DE

Representative=s name: DR. RALF KOTITSCHKE, DE

Representative=s name: KOTITSCHKE & HEURUNG PARTNERSCHAFT MBB, DE

Representative=s name: KOTITSCHKE & HEURUNG PARTNERSCHAFT, DE

R016 Response to examination communication
R081 Change of applicant/patentee

Owner name: QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD., GB

Free format text: FORMER OWNER: CAMBRIDGE SILICON RADIO LTD., CAMBRIDGE, CAMBRIDGESHIRE, GB

R082 Change of representative

Representative=s name: DR. RALF KOTITSCHKE, DE

Representative=s name: KOTITSCHKE & HEURUNG PARTNERSCHAFT MBB, DE

Representative=s name: KOTITSCHKE & HEURUNG PARTNERSCHAFT MBB PATENT-, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee