BR0205868A - Aparelho e método de demodulação em um sistema de comunicação que emprega qam 16-ário - Google Patents

Aparelho e método de demodulação em um sistema de comunicação que emprega qam 16-ário

Info

Publication number
BR0205868A
BR0205868A BR0205868-5A BR0205868A BR0205868A BR 0205868 A BR0205868 A BR 0205868A BR 0205868 A BR0205868 A BR 0205868A BR 0205868 A BR0205868 A BR 0205868A
Authority
BR
Brazil
Prior art keywords
sym
communication system
ary
demodulation
smooth value
Prior art date
Application number
BR0205868-5A
Other languages
English (en)
Inventor
Sang-Hyuck Ha
Min-Goo Kim
Original Assignee
Samsung Electronics Co 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of BR0205868A publication Critical patent/BR0205868A/pt

Links

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
    • 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

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)

Abstract

"APARELHO E MéTODO DE DEMODULAçãO EM UM SISTEMA DE COMUNICAçãO QUE EMPREGA QAM 16-áRIO". é revelado um aparelho de demodulação QAM (Modulação de Amplitude de Quadratura) 16-ário. Uma primeira calculadora decide um valor suave <sym>(S~ k,2~) de um terceiro símbolo demodulado entre quatro símbolos demodulados ao subtrair uma distância 2a entre dois símbolos demodulados no mesmo eixo de uma tabela de mapeamento de um nível <124>Y~ k~<124> do componente de fase de quadratura Y~ k~. A segunda calculadora decide um valor suave <sym>(S~ k,3~) de um quarto símbolo demodulado ao calcular Y~ k~+<244><sym>Z~ k~ utilizando a primeira variável <244>. A terceira calculadora decide um valor suave <sym>(S~ k,0~) de um primeiro símbolo demodulado ao subtrair a distância 2a de um nível <124>X~ k~<124> do componente em fase X~ k~. A quarta calculadora decide um valor suave <sym>(S~ K,1~) de um segundo símbolo demodulado ao calcular X~k~+<225><sym>Z'~ k~ utilizando a segunda variável <225>.
BR0205868-5A 2001-08-13 2002-08-13 Aparelho e método de demodulação em um sistema de comunicação que emprega qam 16-ário BR0205868A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020010048758A KR100800885B1 (ko) 2001-08-13 2001-08-13 다중레벨변조를 사용하는 통신시스템의 복조장치 및 방법
PCT/KR2002/001545 WO2003017610A1 (en) 2001-08-13 2002-08-13 Demodulation apparatus and method in a communication system employing 16-ary qam

Publications (1)

Publication Number Publication Date
BR0205868A true BR0205868A (pt) 2003-12-23

Family

ID=19713154

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0205868-5A BR0205868A (pt) 2001-08-13 2002-08-13 Aparelho e método de demodulação em um sistema de comunicação que emprega qam 16-ário

Country Status (10)

Country Link
US (1) US6661282B2 (pt)
EP (1) EP1284567A3 (pt)
JP (1) JP3741703B2 (pt)
KR (1) KR100800885B1 (pt)
CN (1) CN1324868C (pt)
AU (1) AU2002321932B2 (pt)
BR (1) BR0205868A (pt)
CA (1) CA2425499C (pt)
RU (1) RU2257011C2 (pt)
WO (1) WO2003017610A1 (pt)

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KR100548314B1 (ko) * 2002-10-11 2006-02-02 엘지전자 주식회사 무선통신 수신시스템의 오류제어방법
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WO2004095713A2 (en) * 2003-04-14 2004-11-04 Bae Systems Information And Electronic Systems Integration Inc. Joint symbol, amplitude, and rate estimator
KR100433028B1 (ko) * 2003-06-23 2004-05-27 서홍석 정방형 직교진폭변조(qam)수신신호를 복조하기 위한 연성결정 방법 및 그 장치
JP4452716B2 (ja) 2003-06-23 2010-04-21 ソ、ホン−ソク 直交振幅変調の軟判定を用いた復調方法及び復調装置
US7315578B2 (en) * 2003-12-24 2008-01-01 Telefonaktiebolaget Lm Ericsson (Publ) Fast soft value computation methods for gray-mapped QAM
DE102004025826A1 (de) * 2004-05-24 2005-12-22 Micronas Gmbh Verfahren zur Rückbildung einer Bitsequenz aus QPSK- oder QAM-Symbolen
US7397843B2 (en) * 2004-08-04 2008-07-08 Telefonaktiebolaget L L M Ericsson (Publ) Reduced complexity soft value generation for multiple-input multiple-output (MIMO) joint detection generalized RAKE (JD-GRAKE) receivers
CN1787510B (zh) * 2004-12-10 2010-07-14 中兴通讯股份有限公司 数字通信系统中16级正交幅度调制的解调方法及装置
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WO2007045122A1 (fr) * 2005-10-18 2007-04-26 Zte Corporation Procede de demodulation logicielle pour 16 qam dans un systeme de communication
KR100768512B1 (ko) 2005-12-10 2007-10-18 한국전자통신연구원 다차원 심볼 검출 방법 및 이를 적용한 연판정 방법
US7586991B2 (en) * 2006-03-16 2009-09-08 Posdata Co., Ltd. Method and apparatus for calculating likelihood metric of a received signal in a digital communication system
DE102006038963A1 (de) * 2006-08-21 2008-03-13 Micronas Gmbh Verfahren bzw. Schaltungsanordnung zum Entscheiden eines Symbols beim Empfang eines mit einem Quadratur-Signalpaar gekoppelten Signals
CN101136898B (zh) * 2006-08-28 2010-12-08 联芯科技有限公司 一种正交调幅软判决方法及装置
KR100854635B1 (ko) * 2006-12-12 2008-08-27 포스데이타 주식회사 연판정 입력 메트릭 산출 장치 및 방법과, 이를 이용한수신 심볼 복조 장치 및 방법
GB2458418B (en) 2006-12-19 2011-08-03 Lg Electronics Inc Sequence generating method for efficient detection and method for transmitting and receiving signals using the same
WO2008097045A2 (en) * 2007-02-05 2008-08-14 Lg Electronics Inc. Methods for generating a set of at least two sequences, and method for generating sequence for the same
ITVA20070032A1 (it) * 2007-03-21 2008-09-22 Dora Spa Metodo di approssimazione dei rapporti di somiglianza in trasmissioni digitali qam e relativo soft-autput de-mapper
KR101467751B1 (ko) * 2007-04-24 2014-12-03 엘지전자 주식회사 이동 통신 시스템에서 시퀀스 생성 방법 및 시퀀스 기반의신호 송신 방법
WO2008130206A1 (en) * 2007-04-24 2008-10-30 Lg Electronics Inc. Method for generating sequence and method for transmitting signal based on the sequence in mobile communication system
US8340202B2 (en) * 2010-03-11 2012-12-25 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient soft modulation for gray-mapped QAM symbols
CN103905370B (zh) * 2012-12-27 2017-05-24 展讯通信（上海）有限公司 正交振幅调制信号的软解调方法和装置、移动终端
US9008241B1 (en) * 2013-10-25 2015-04-14 Samsung Electronics Co., Ltd Low complexity near optimal two spatial stream maximal likelihood detector
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Also Published As

Publication number Publication date
KR100800885B1 (ko) 2008-02-04
JP2004522386A (ja) 2004-07-22
JP3741703B2 (ja) 2006-02-01
AU2002321932B2 (en) 2004-10-21
US20030102905A1 (en) 2003-06-05
CN1476705A (zh) 2004-02-18
CA2425499A1 (en) 2003-02-27
CA2425499C (en) 2006-06-20
RU2257011C2 (ru) 2005-07-20
US6661282B2 (en) 2003-12-09
WO2003017610A1 (en) 2003-02-27
CN1324868C (zh) 2007-07-04
EP1284567A3 (en) 2006-08-02
KR20030014872A (ko) 2003-02-20
EP1284567A2 (en) 2003-02-19

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2055 DE 25/05/2010.