| 基于比特可靠性的改进HARQ星座图重排技术 |
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| 引用本文： | 贾民丽,匡镜明,何遵文.基于比特可靠性的改进HARQ星座图重排技术[J].北京理工大学学报,2007,27(9):814-819. |
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| 作者姓名： | 贾民丽 匡镜明 何遵文 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 摘 要： | 研究采用低密度奇偶校验(LDPC)码和64QAM调制的Chase合并型混合ARQ(HARQ)系统. 提出一种适用于任意重传次数的星座图重排(CoRe)搜索算法,根据该算法搜索得到采用星座图重排的HARQ优化方案. 仿真结果表明,所得优化方案能够有效地降低多次重传合并后比特间的可靠性差异,显著提高系统的误比特率(BER)性能和信息传输效率.
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| 关 键 词： | 混合ARQ 星座图重排 64QAM 低密度奇偶校验码 |
| 文章编号： | 1001-0645（2007）09-0815-05 |
| 修稿时间： | 2006-11-23 |
Enhanced HARQ Employing Constellation Rearrangement Based on Bit Reliability |
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| JIA Min-li,KUANG Jing-ming and HE Zun-wen.Enhanced HARQ Employing Constellation Rearrangement Based on Bit Reliability[J].Journal of Beijing Institute of Technology(Natural Science Edition),2007,27(9):814-819. |
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| Authors: | JIA Min-li KUANG Jing-ming and HE Zun-wen |
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| Institution: | Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | To investigate the low density parity check(LDPC) coded Chase combining hybrid ARQ(HARQ)system with 64QAM modulation,a searching algorithm is proposed for searching constellation rearrangement(CoRe) schemes with arbitrary retransmission number.Based on that,the enhanced HARQ strategies employing CoRe can be got by computer searching.Simulation results show that the proposed strategies can not only efficiently reduce the reliability variances of bits after soft combining but also significantly improve the BER performance and information transmission efficiency. |
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| Keywords: | hybrid ARQ(HARQ) constellation rearrangement(CoRe) 64QAM low density parity check(LDPC) code |
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