ZA200605062B - Fast soft value computation methods for gray-mapped QAM - Google Patents

Fast soft value computation methods for gray-mapped QAM Download PDF

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Publication number
ZA200605062B
ZA200605062B ZA200605062A ZA200605062A ZA200605062B ZA 200605062 B ZA200605062 B ZA 200605062B ZA 200605062 A ZA200605062 A ZA 200605062A ZA 200605062 A ZA200605062 A ZA 200605062A ZA 200605062 B ZA200605062 B ZA 200605062B
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ZA
South Africa
Prior art keywords
symbol
bit
unified
modulation constellation
nominal
Prior art date
Application number
ZA200605062A
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English (en)
Inventor
Cheng Jung-Fu
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.)
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Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of ZA200605062B publication Critical patent/ZA200605062B/en

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Classifications

    • 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
    • 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
    • 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
    • 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
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/45—Soft decoding, i.e. using symbol reliability information
    • 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
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Measurement Of Radiation (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
ZA200605062A 2003-12-24 2004-12-20 Fast soft value computation methods for gray-mapped QAM ZA200605062B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/746,434 US7315578B2 (en) 2003-12-24 2003-12-24 Fast soft value computation methods for gray-mapped QAM

Publications (1)

Publication Number Publication Date
ZA200605062B true ZA200605062B (en) 2008-02-27

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ID=34700645

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200605062A ZA200605062B (en) 2003-12-24 2004-12-20 Fast soft value computation methods for gray-mapped QAM

Country Status (11)

Country Link
US (1) US7315578B2 (zh)
EP (1) EP1704691B1 (zh)
JP (1) JP4620685B2 (zh)
KR (1) KR20060123396A (zh)
CN (1) CN1898925B (zh)
AT (1) ATE421214T1 (zh)
DE (1) DE602004019147D1 (zh)
PL (1) PL1704691T3 (zh)
RU (1) RU2006126650A (zh)
WO (1) WO2005067239A1 (zh)
ZA (1) ZA200605062B (zh)

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KR100783807B1 (ko) 2006-05-15 2007-12-10 삼성전자주식회사 디씨엠 디맵핑 방법 및 이를 이용한 디씨엠 디맵퍼
US7787568B2 (en) * 2006-06-22 2010-08-31 Symbol Technologies, Inc. High bit rate RFID system
JP4484911B2 (ja) 2006-08-28 2010-06-16 三星電子株式会社 広帯域無線接続システムにおける受信装置及び方法
US7826521B1 (en) * 2007-02-28 2010-11-02 Atheros Communications, Inc. Rate adaptation using error vector magnitude
US7995678B2 (en) * 2007-11-28 2011-08-09 Harris Corporation System and method for communicating data using weighted bit soft decisions for differentially encoded phase shift keying
CN101237434B (zh) * 2008-03-10 2011-02-02 电子科技大学 一种格雷映射m-psk调制的软判决方法
DE102010044226B4 (de) 2009-09-10 2018-07-12 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zur geographischen Authentifikation durch binärkodierte Positionsinformationen und Verwendung eines hierarchischen 2D n-bit-Graycodes zur Codierung von Fahrzeugpositionen in Vehicular Ad-hoc Networks
WO2011075024A1 (en) 2009-12-18 2011-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Glitch mitigation in a radio receiver
US8340202B2 (en) * 2010-03-11 2012-12-25 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient soft modulation for gray-mapped QAM symbols
US8934581B2 (en) * 2012-04-24 2015-01-13 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for soft symbol processing in a communication receiver
GB2499270B (en) * 2012-06-07 2014-07-09 Imagination Tech Ltd Efficient demapping of constellations
US8811539B2 (en) * 2012-06-26 2014-08-19 Siano Mobile Silicon Ltd. Demapper for rotated QAM constellations
US9768989B2 (en) * 2013-05-07 2017-09-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for soft symbol generation in a communication receiver
US9602242B2 (en) 2014-06-10 2017-03-21 Telefonaktiebolaget L M Ericsson (Publ) Coherent reception with noisy channel state information
US9692622B2 (en) 2014-06-10 2017-06-27 Telefonaktiebolaget L M Ericsson (Publ) Equalization with noisy channel state information
US10312950B2 (en) 2014-10-03 2019-06-04 Interdigital Patent Holdings, Inc. Systems and methods for multiuser interleaving and modulation
CN105550569B (zh) * 2016-02-04 2018-03-20 东南大学 基于星座轨迹图像特征的设备指纹提取及设备识别方法
US10097395B2 (en) 2016-04-21 2018-10-09 Electronics And Telecommunications Research Institute Apparatus and method for transmitting and receiving signal based on QAM constellation
CN109639618B (zh) * 2019-01-23 2021-03-02 重庆邮电大学 一种适用于高阶正交幅度调制信号的低复杂度软输出解调方法
US20240048165A1 (en) * 2022-08-02 2024-02-08 L3Harris Technologies, Inc. System and method implementing soft-decision based excision cancellation technology
US11996874B1 (en) 2023-01-13 2024-05-28 L3Harris Technologies, Inc. System and method of determining interfering signal parameters

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JP3745502B2 (ja) * 1997-06-24 2006-02-15 ソニー株式会社 受信装置及び送受信装置並びに通信方法
US6078626A (en) * 1997-09-24 2000-06-20 Ericsson Inc. Methods and systems for communicating information using separable modulation constellations
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KR100450949B1 (ko) * 2001-09-18 2004-10-02 삼성전자주식회사 데이터 통신 시스템에서 채널 복호기 입력 연성 결정 값계산 장치 및 방법
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Also Published As

Publication number Publication date
PL1704691T3 (pl) 2009-07-31
CN1898925A (zh) 2007-01-17
JP2007517472A (ja) 2007-06-28
EP1704691B1 (en) 2009-01-14
US20050141628A1 (en) 2005-06-30
EP1704691A1 (en) 2006-09-27
RU2006126650A (ru) 2008-01-27
ATE421214T1 (de) 2009-01-15
DE602004019147D1 (de) 2009-03-05
US7315578B2 (en) 2008-01-01
CN1898925B (zh) 2011-01-26
KR20060123396A (ko) 2006-12-01
JP4620685B2 (ja) 2011-01-26
WO2005067239A1 (en) 2005-07-21

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