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Open Access

Non-Uniform APSK Optimization for BICM Systems

Keqian Yan, Kewu Peng, Fang Yang, Jian Song( )
Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.
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Abstract

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.

Keywords

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

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Tsinghua Science and Technology
Volume 20 Issue 2,
April 2015
Pages 175-181
DOI: 10.1109/TST.2015.7085630
Cite this article:
Yan K, Peng K, Yang F, et al. Non-Uniform APSK Optimization for BICM Systems. Tsinghua Science and Technology, 2015, 20(2): 175-181. https://doi.org/10.1109/TST.2015.7085630

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Received: 06 June 2014
Revised: 14 August 2014
Accepted: 15 August 2014
Published: 23 April 2015
© The author(s) 2015
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