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 。
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.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2001年第4期495-498,共4页
Acta Electronica Sinica
基金
国家自然科学基金! (No .69872 0 2 0 )
教育部高等学校骨干教师资助计划
山东省自然科学基金! (No .Y2 0 0 0G1 4 )
东南大学
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
Channel capacity
Computer simulation
Error correction
Image communication systems
Modulation
Numerical analysis
Rayleigh fading
Signal encoding
