电子学报 ›› 2001, Vol. 29 ›› Issue (4): 495-498.

• 论文 • 上一篇    下一篇

Rayleigh衰落信道中多级编码调制的不等错误保护

袁东风1, 韩 冰2, 曹志刚3   

  1. 1. 山东大学电子工程系,济南 250100;2. 东南大学电子工程系,南京 210096;3. 清华大学电子工程系,北京 100084
  • 收稿日期:1999-12-06 修回日期:2000-11-15 出版日期:2001-04-25 发布日期:2001-04-25

Unequal Error Protection of Multilevel Coded Modulation in Rayleigh Fading Channels

YUAN Dong-feng1, HAN Bing2, CAO Zhi-gang3   

  1. 1. Dept.of Electronic Engineering,Shandong Univ.,Jinan 250100,China;2. Dept.of Electronic Engineering,Southeast Univ.,Nanjing 210096,China;3. Dept.of Electronic Engineering,Tsinghua Univ.,Beijing 100084,China
  • Received:1999-12-06 Revised:2000-11-15 Online:2001-04-25 Published:2001-04-25

摘要: 本文研究了Rayleigh衰落信道中以信道容量规则为设计准则的多级编码调制系统的不等错误保护性能的实现及其改进.在详细分析了多级编码调制的不等错误保护原理的基础上,设计了一种针对8ASK调制的非均匀信号星座.理论分析与计算机仿真均表明,非均匀信号星座的设计能够增强多级编码调制系统的不等错误保护能力,在不展宽频带的前提下有效地提高Rayleigh衰落环境下数字通信系统的传输质量.

关键词: 不等错误保护, 多级编码调制, 信道容量规则, Rayleigh衰落信道

Abstract: The unequal error protection of multilevel coded modulation based on capacity rule in Rayleigh fading channels is investigated.After the unequal error protection of multilevel coded modulation is discussed in detail,a non-uniform signal constellation applied to 8ASK modulation is designed.Both theoretical analysis and computer simulation show that non-uniform signal constellation can improve unequal error protection ability of multilevel coded modulation system.It improves transmission quality in Rayleigh fading environment and saves bandwidth at the same time.

Key words: unequal error protection, multilevel coded modulation, capacity rule, Rayleigh fading channels

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