| 一种基于信噪比的HARQ自适应合并算法 |
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| 引用本文： | 张勇,彭建华,季中恒. 一种基于信噪比的HARQ自适应合并算法[J]. 计算机工程与应用, 2011, 47(17): 78-80. DOI: 10.3778/j.issn.1002-8331.2011.17.021 |
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| 作者姓名： | 张勇 彭建华 季中恒 |
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| 作者单位： | 国家数字交换系统工程技术研究中心，郑州 450002 |
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| 基金项目： | 国家高技术研究发展计划(863) |
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| 摘 要： | 目前无线通信中广泛使用的HARQ合并技术主要是Chase合并和递增冗余（IR）合并。针对Chase合并在低信噪比下性能受限，递增冗余（IR）合并实际应用复杂的问题，提出了一种基于信噪比的自适应合并算法，通过实时估计信道的信噪比，综合使用Chase合并和递增冗余（IR）合并，实现了系统性能和实现复杂度的统一。仿真结果表明，算法是切实可行的。
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| 关 键 词： | 混合自动重传请求（HARQ） Chase合并 递增冗余 自适应合并 |
| 修稿时间： | |
Adaptive combining scheme of HARQ based on signal-to-noise |
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| ZHANG Yong,PENG Jianhua,JI Zhongheng. Adaptive combining scheme of HARQ based on signal-to-noise[J]. Computer Engineering and Applications, 2011, 47(17): 78-80. DOI: 10.3778/j.issn.1002-8331.2011.17.021 |
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| Authors: | ZHANG Yong PENG Jianhua JI Zhongheng |
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| Affiliation: | National Digital Switching System Engineering & Technological Research Center，Zhengzhou 450002，China |
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| Abstract: | The combining technology of HARQ are Chase combining and Incremental Redundancy（IR） generally.However, the performance of Chase combining is not excellent at low signal-to-noise channels and IR combining is complex to be realized.This paper proposes an adaptive combining algorithm based on signal-to-noise.With the real time estimation of channel signal-to-noise, this algorithm uses Chase combining and IR combining synthetically, which unifies performance and complexity of the system.The simulation results indicate that the new adaptive combining scheme is feasible. |
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| Keywords: | Hybrid Automatic Repeat Request（HARQ） Chase combining incremental redundancy adaptive combining |
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