Non-Uniform APSK Optimization for BICM Systems

被引：2
|
作者：
Yan, Keqian [1 ]
Peng, Kewu [1 ]
Yang, Fang [1 ]
Song, Jian [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Tsinghua Natl Lab Informat Sci & Technol TNList, Beijing 100084, Peoples R China
来源：
TSINGHUA SCIENCE AND TECHNOLOGY | 2015年 / 20卷 / 02期
关键词：
Bit-Interleaved Coded Modulation (BICM); non-uniform Amplitude Phase Shift Keying (APSK); mutual information; geometrical shaping; CONSTELLATION;
D O I：
10.1109/TST.2015.7085630
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Traditional Amplitude Phase Shift Keying (APSK) consists of rings with points uniformly spaced. By giving up this uniform-spacing feature, we propose an APSK optimization method based on the uniform APSK with Gray labeling (Gray-APSK). The aim of the optimization is to maximize the Generalized Mutual Information (GMI) of Bit-Interleaved Coded Modulation (BICM) for the targeted code rate and channel. We show that our optimized non-uniform APSK could offer further performance gain compared with the conventional uniform Gray-APSK and considerably outperforms the traditional quadrature amplitude modulation at the targeted SNR and channel.
引用
收藏
页码：175 / 181
页数：7
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