A simplified bit metric calculation method for high-order PSK

被引：0
|
作者：
WANG Lei [1 ]
XU DaZhuan [1 ]
ZHANG XiaoFei [1 ]
机构：
[1] College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics
来源：
Science China(Information Sciences) | 2013年 / 56卷 / 07期
关键词：
phase shift keying; high order modulation; bit metric; soft demodulation;
D O I：
暂无
中图分类号：
TN911.3 [调制理论];
学科分类号：
081002 ;
摘要：
This paper proposes a simplified bit metric calculation method for high-order PSK signal with Gray-mapping. This method calculates the bit metric recursively by the symmetry of Gray code. Analysis and simulation results show that the proposed method can significantly reduce the computational complexity and maintain similar performance compared to ML and Max-Log bit metric. Additionally, this method generates bit metrics of PSK signals with different modulation order in the same way, so it can be applied to adaptive modulation system.
引用
收藏
页码：109 / 117
页数：9
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