| 一种新型的基于OFDM系统的自适应HARQ方案 |
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| 引用本文： | 程锦霞,周世东,姚 彦. 一种新型的基于OFDM系统的自适应HARQ方案[J]. 通信学报, 2005, 26(12): 126-130 |
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| 作者姓名： | 程锦霞 周世东 姚 彦 |
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| 作者单位： | 清华大学,电子工程系,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目(90204001) |
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| 摘 要： | 基于正交频分复用(OFDM)系统提出一种自适应混合自动重传请求(HARQ)方案,它充分利用发送端获得的信道状态信息对每次重传数据符号进行重组并且采用星座重组方案平均调制符号内各比特间的可靠性差异。仿真分析表明,自适应HARQ方案与星座重组方案相结合大大提高了系统通过率、降低误块率和传输时延。
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| 关 键 词： | 混合自动重传请求 正交频分复用 交织 信道状态信息 星座 通过率 |
| 文章编号： | 1000-436X（2005）12-0126-05 |
| 收稿时间： | 2005-04-07 |
| 修稿时间： | 2005-10-24 |
Novel adaptive HARQ scheme for OFDM system |
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| CHENG Jin-xia,ZHOU Shi-dong,YAO Yan. Novel adaptive HARQ scheme for OFDM system[J]. Journal on Communications, 2005, 26(12): 126-130 |
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| Authors: | CHENG Jin-xia ZHOU Shi-dong YAO Yan |
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| Affiliation: | Dept. of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | An adaptive hybrid automatic repeat request(HARQ)scheme was proposed based on orthogonal frequency division multiplexing(OFDM)system.It utilized the channel state information fully to rearrange symbols at each retransmission.Constellation rearrangement technology was also adopted to average bit reliabilities within a symbol.Simulation results show that the proposed scheme improves the throughput of the system significantly and greatly reduces the block error rate and transmission delay. |
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| Keywords: | HARQ OFDM interleaving channel state information constellation throughput |
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