| LTE系统下行链路中HARQ技术的研究与仿真 |
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| 引用本文： | 李旭虹,刘燕,王安义.LTE系统下行链路中HARQ技术的研究与仿真[J].工矿自动化,2012,38(1):62-65. |
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| 作者姓名： | 李旭虹 刘燕 王安义 |
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| 作者单位： | 西安科技大学通信与信息工程学院,陕西西安,710054 |
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| 基金项目： | 国家自然科学基金，教育部"新世纪优秀人才支持计划"项目，高等学校博士学科点专项科研基金，湖北省自然科学基金 |
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| 摘 要： | 介绍了LTE系统中HARQ技术原理;以III型HARQ为研究对象,搭建了基于HARQ的LTE系统下行链路仿真平台,并对加入HARQ技术前后的LTE系统误块率进行了仿真比较。结果表明,HARQ技术不仅有效降低了LTE系统的误块率,而且使LTE系统在较低的信噪比情况下仍可获得与未采用HARQ技术时高信噪比情况相同甚至更好的通信质量,即能提高小区覆盖边缘用户和无线信道质量较差的用户的通信质量。
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| 关 键 词： | LTE系统 链路级仿真 HARQ 信道编码 误块率 速率匹配 软球译码算法 |
Research of HARQ Technology in LTE System Downlink and Its Simulation |
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| LI Xu-hong
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LIU Yan
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WANG An-yi.Research of HARQ Technology in LTE System Downlink and Its Simulation[J].Industry and Automation,2012,38(1):62-65. |
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| Authors: | LI Xu-hong LIU Yan WANG An-yi |
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| Affiliation: | (Communication and Information Engineering College of Xi’an University of Science and Technology,Xi’an 710054,China) |
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| Abstract: | The paper introduced principle of HARQ technology of LTE system,established simulation platform of LTE system downlink based on type III HARQ,and simulated and compared BLER of LTE system with and without HARQ technology.The simulation result showed that HARQ technology not only reduces BLER of LTE system effectively,but also makes LTE system to get the same as or better communication quality under the condition of low signal-to-noise ratio,namely HARQ technology can improve communication quality of users who are in cell coverage edges and poor radio channels. |
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| Keywords: | LTE system link level simulation HARQ channel coding BLER rate matching soft sphere decoder algorithm |
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