| HARQ过程条件错误概率分析 |
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| 引用本文： | 龙航,王文博.HARQ过程条件错误概率分析[J].电子科技大学学报(社会科学版),2010(1). |
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| 作者姓名： | 龙航 王文博 |
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| 作者单位： | 北京邮电大学泛网无线通信教育部重点实验室; |
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| 基金项目： | 国家自然科学基金(60802082);;教育部博士学科点新教师基金(200800131023) |
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| 摘 要： | 在混合自动请求重传(HARQ)技术应用中,之前的传输失败是重传的前提,合并后数据包中的噪声已不再是零均值高斯分布,且与发射信号相关。然而,在目前HARQ及其他类似技术的分析中,普遍假设合并后的噪声仍服从零均值高斯分布,导致对错误概率估计偏小。该文对重传合并后的条件错误概率进行了精确分析,提出了条件错误概率的近似表达式,为进一步分析提供了方法,并比较了传统假设条件下的分析结果。在该假设条件下的错误概率估计与真实值的误差随数据包符号数的增加而减小。重传时信道增益越小,误差越大。
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| 关 键 词： | 错误概率 高斯噪声 混合自动请求重传 概率分布 无线通信系统 |
Conditional Error Probability Analysis in HARQ Process |
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| LONG Hang , WANG Wen-bo.Conditional Error Probability Analysis in HARQ Process[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),2010(1). |
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| Authors: | LONG Hang WANG Wen-bo |
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| Institution: | Key Laboratory of Universal Wireless Communication of Ministry of Education;Beijing University of Posts & Telecommunications Haiding Beijing 100876 |
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| Abstract: | In hybrid automatic repeat request (HARQ) process,the failure of the first transmission is the condition of the retransmission.The distribution of the noise after combining is not zero-mean-Gaussian.Unfortunately,the assumption of zero-mean-Gaussian noise is widely used in the analysis of HARQ,as well as some similar technologies.Therefore,the estimation of the conditional error probability is smaller than the exact one.In this paper,the conditional error probability under non-zero-mean-Gaussian noise is ex... |
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| Keywords: | error probability Gaussian noise HARQ probability distributions wireless telecommunication systems |
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