CN1493137A - 一种用于数字移动通信系统的正交振幅调制方法 - Google Patents

一种用于数字移动通信系统的正交振幅调制方法 Download PDF

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Publication number
CN1493137A
CN1493137A CNA018228593A CN01822859A CN1493137A CN 1493137 A CN1493137 A CN 1493137A CN A018228593 A CNA018228593 A CN A018228593A CN 01822859 A CN01822859 A CN 01822859A CN 1493137 A CN1493137 A CN 1493137A
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CN
China
Prior art keywords
bit
planisphere
signal
amplitude modulation
quadrature amplitude
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Pending
Application number
CNA018228593A
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English (en)
Inventor
邹永忠
董江波
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Linkair Communications Inc
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Linkair Communications Inc
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Application filed by Linkair Communications Inc filed Critical Linkair Communications Inc
Publication of CN1493137A publication Critical patent/CN1493137A/zh
Pending 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
    • H04L27/32—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
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power

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  • 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

本发明涉及一种用于数字移动通信系统的正交振幅调制方法。在系统带宽一定的条件下，为解决频带利用率和功率利用率的矛盾，本发明提出了一种使最小判决区域最大，并满足GRAY编码的2幅8项16QAM星座图的设计方法及其相应的软判决方法，通过增加最小判决区域来优化星座图，据此确定每一比特的判决区域，并用代数形式描述，再以相应的修正系数的经验值修正得到相应比特的软判决信息值。本发明简化了系统设计，提高了运算速度和精度。

Description

PCT国内申请，说明书已公开。

Claims (1)

  1. PCT国内申请，权利要求书已公开。
CNA018228593A 2001-11-14 2001-11-14 一种用于数字移动通信系统的正交振幅调制方法 Pending CN1493137A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2001/001556 WO2003043283A1 (fr) 2001-11-14 2001-11-14 Procede de modulation d'amplitude en quadrature utilise dans un systeme de communication mobile numerique

Publications (1)

Publication Number Publication Date
CN1493137A true CN1493137A (zh) 2004-04-28

Family

ID=4574889

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA018228593A Pending CN1493137A (zh) 2001-11-14 2001-11-14 一种用于数字移动通信系统的正交振幅调制方法

Country Status (2)

Country Link
CN (1) CN1493137A (zh)
WO (1) WO2003043283A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100418334C (zh) * 2005-01-26 2008-09-10 清华大学 π/2相移的非正方形M-QAM调制解调方法及其系统
WO2009082947A1 (en) * 2007-12-21 2009-07-09 Mediatek Inc. Decoding communication signals
CN101626274B (zh) * 2008-07-10 2012-08-22 华为技术有限公司 星型十六进制光信号的生成方法及相关设备和系统
CN105103511A (zh) * 2013-04-12 2015-11-25 松下电器（美国）知识产权公司 发送方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8340202B2 (en) 2010-03-11 2012-12-25 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient soft modulation for gray-mapped QAM symbols
CN105282085B (zh) * 2014-07-22 2018-11-16 华为技术有限公司 编解码方法和设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500875A (en) * 1990-12-12 1996-03-19 Signal Processing Associates Pty Limited QAM encoding
US5396518A (en) * 1993-05-05 1995-03-07 Gi Corporation Apparatus and method for communicating digital data using trellis coding with punctured convolutional codes
KR0129577B1 (ko) * 1994-04-30 1998-04-10 배순훈 32-직각진폭변조방식을 이용하는 영상수신시스템에서 개선된 메트릭 계산방법
US5740203A (en) * 1995-09-14 1998-04-14 Thomson Consumer Electronics, Inc. Trellis demapper of a convolutional decoder for decoding pragmatic trellis codes suitable for use in a multi-channel receiver of satellite, terrestrial and cable transmitted FEC compressed-digital television data
AU1925301A (en) * 1999-11-23 2001-06-04 Thomson Licensing S.A. Gray encoding for hierarchical qam transmission systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100418334C (zh) * 2005-01-26 2008-09-10 清华大学 π/2相移的非正方形M-QAM调制解调方法及其系统
WO2009082947A1 (en) * 2007-12-21 2009-07-09 Mediatek Inc. Decoding communication signals
CN101626274B (zh) * 2008-07-10 2012-08-22 华为技术有限公司 星型十六进制光信号的生成方法及相关设备和系统
CN105103511A (zh) * 2013-04-12 2015-11-25 松下电器（美国）知识产权公司 发送方法
CN105103511B (zh) * 2013-04-12 2019-02-15 太阳专利托管公司 发送方法

Also Published As

Publication number Publication date
WO2003043283A1 (fr) 2003-05-22

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