| 基于256-QAM星座图重排HARQ技术 |
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| 引用本文： | 庞斌,戴宪华,张涵,陈嫦娟,廖建强,肖舟.基于256-QAM星座图重排HARQ技术[J].无线电通信技术,2009,35(2). |
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| 作者姓名： | 庞斌 戴宪华 张涵 陈嫦娟 廖建强 肖舟 |
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| 作者单位： | 1. 中山大学,信息科学与技术学院,广东,广州,510006
2. 中国网通(集团)有限公司广东省分公司,广东,广州,510630 |
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| 基金项目： | 国家自然科学基金，国家自然科学基金-广东省联合基金，广东省科技计划项目，广东省教育部产学研项目 |
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| 摘 要： | 介绍了一种基于256-QAM调制的混合ARQ(HARQ)技术,该技术通过星座图重排,降低了多级调制造成的比特之间可靠性的差异,能够显著提高HARQ的性能。首先,提出了标准的符合格雷映射关系的256-QAM星座图后,并通过选取另外3个星座图进行重排,构成基于256-QAM的4星座图影射规则。仿真结果表明该方法最终降低复杂度并提高HARQ性能,这将对未来256-QAM的应用(例如HSDPA、HSUPA)提供较大的参考价值和现实意义。
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| 关 键 词： | 256-QAM 星座图重排 HARQ HSDPA Turbo |
Hybrid ARQ Technique Employing a Signal Constellation Rearrangement Based on 256-QAM |
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| PANG Bin,DAI Xian-hua,ZHANG Han,CHEN Chang-juan,LIAO Jian-qiang,XIAO Zhou.Hybrid ARQ Technique Employing a Signal Constellation Rearrangement Based on 256-QAM[J].Radio Communications Technology,2009,35(2). |
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| Authors: | PANG Bin DAI Xian-hua ZHANG Han CHEN Chang-juan LIAO Jian-qiang XIAO Zhou |
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| Abstract: | In this paper,we introduce a Hybrid ARQ (HARQ) technique based on 256-QAM.By employing signal constellation rearrangement,the diversity of bit reliabilities caused by M-QAM signal constellation can be reduced,thus the corresponding performance of HARQ could be enhanced.We present the standard signal constellation (Gray Mapping) of 256-QAM,in which 3 signal constellations are rearranged to derived 4 types of constellation mapping rules of 256-QAM.The simulation results show that the proposed technique performs a noticeable gain in HARQ performance with a lower complexity.This will be favorable to the application of 256-QAM (for example,in HSDPA and HSUPA),and provide great value in reference and practical application. |
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| Keywords: | 256-QAM HARQ HSDPA Turbo |
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