Non-Uniform APSK Optimization for BICM Systems

作者：Yan, Keqian; Peng, Kewu; Yang, Fang; Song, Jian^*

来源：Tsinghua Science and Technology, 2015, 20(2): 175-181.

DOI：10.1109/TST.2015.7085630

• Bit-Interleaved Coded Modulation (BICM)
• non-uniform Amplitude Phase Shift Keying (APSK)
• mutual information
• geometrical shaping

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.

• 出版日期2015-4
• 单位清华大学