| 截短Turbo混合ARQ及衰落信道下的性能 |
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| 引用本文： | 张忠培,王艺,周世东,姚彦.截短Turbo混合ARQ及衰落信道下的性能[J].清华大学学报(自然科学版),2002,42(7):889-892. |
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| 作者姓名： | 张忠培 王艺 周世东 姚彦 |
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| 作者单位： | 清华大学,电子工程系,微波与数字通信技术国家重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目 (6983 10 3 0 ) |
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| 摘 要： | 为了提高移动通信中数据及图象的传输可靠性 ,需采用自动重传请求 (ARQ)与前向纠错 (FEC)相结合的混合ARQ信道编码 (HARQ)技术 ,该文提出了基于 Turbo码编码的有限次重传 HARQ方案。给出了传输结构及组合译码算法 ,分析了系统通过率 ,讨论了该方案 Turbo码译码迭代次数及帧长度对系统性能的影响。通过分析仿真 ,说明了本方案具有数据存贮量小、系统通过率高、延迟小并易于实现的优点
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| 关 键 词： | Turbo码 混合自动重请求 通过率 |
| 文章编号： | 1000-0054(2002)07-0889-04 |
| 修稿时间： | 2001年2月23日 |
Performances of truncated type-Ⅱ hybrid Turbo code ARQ schemes over fading channels |
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| ZHANG Zhongpei,WANG Yi,ZHOU Shidong,YAO Yan.Performances of truncated type-Ⅱ hybrid Turbo code ARQ schemes over fading channels[J].Journal of Tsinghua University(Science and Technology),2002,42(7):889-892. |
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| Authors: | ZHANG Zhongpei WANG Yi ZHOU Shidong YAO Yan |
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| Abstract: | The reliability of data and image transmission in communication systems is usually improved using hybrid channel coding schemes with automatic repeat request (ARQ) and forward error correction (FEC). However, they require unlimited numbers of retransmissions, which makes implementation impossible. This paper presents a new scheme using type II Turbo ARQ with a limited number of retransmissions. The retransmission protocol and algorithms for combined decoding are described and then the throughput performance is analyzed theoretically. Simulations are used to illustrate the effects on system performance for decoding iteration numbers and frame size. The results show that the proposed scheme has high throughput, short delays and easy implementation. |
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| Keywords: | Turbo code hybrid automatic repeat request (ARQ) throughput |
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