| OFDM系统中基于分组导频的迭代信道估计算法 |
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| 引用本文： | 蒋琦,赵春明,王家恒. OFDM系统中基于分组导频的迭代信道估计算法[J]. 通信学报, 2006, 27(5): 28-34 |
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| 作者姓名： | 蒋琦 赵春明 王家恒 |
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| 作者单位： | 东南大学,移动通信国家重点实验室,江苏,南京,210096 |
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| 摘 要： | 对OFDM系统中由于信道的时变性产生的载波间干扰进行了分析,并在此基础上提出了一种分组导频结构的DFT迭代信道估计算法。与原有的信道估计算法相比,此种算法不仅在一般的信道条件下具有良好的性能,而且更加适合快变信道条件下的OFDM系统。仿真结果表明:提出的OFDM信道估计算法不仅可以给出精度较高的信道信息,而且近似达到理想信道估计的性能。
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| 关 键 词： | 载波间干扰 快变信道 迭代信道估计 理想信道估计 |
| 文章编号： | 1000-436X（2006）05-0028-07 |
| 收稿时间： | 2006-02-17 |
| 修稿时间： | 2006-03-17 |
Iterative channel estimation based on block-type pilot-assisted for OFDM systems |
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| JIANG Qi,ZHAO Chun-ming,WANG Jia-heng. Iterative channel estimation based on block-type pilot-assisted for OFDM systems[J]. Journal on Communications, 2006, 27(5): 28-34 |
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| Authors: | JIANG Qi ZHAO Chun-ming WANG Jia-heng |
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| Affiliation: | National Mobile Communications Research Lab, Southeast University, Nanjing 210096, China |
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| Abstract: | The inter-carrier interference caused by time-variant fading channels in OFDM systems was analyzed and a novel block-type pilot-assisted iterative channel estimation algorithm based on DFT was proposed.The proposed algo-rithm,compared with the conventional algorithms,could provide more accurate channel information not only in slowly time-variant environments,but more important also in fast time-variant environments.The simulation results show that the proposed algorithm can nearly achieve the performance as good as the perfect channel estimation in both slowly and fast time-variant fading channels. |
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| Keywords: | inter-carrier interference fast time variant channel iterative channel estimation perfect channel estimation |
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