| 多输入多输出天线OFDM系统的信道估计 |
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| 引用本文： | 周健. 多输入多输出天线OFDM系统的信道估计[J]. 南京邮电大学学报(自然科学版), 2006, 26(5): 11-16 |
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| 作者姓名： | 周健 |
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| 作者单位： | 南京邮电大学,信号与信息处理研究所,江苏,南京,210003 |
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| 基金项目： | 江苏省高校自然科学基金;南京邮电大学校科研和教改项目 |
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| 摘 要： | 研究利用导频训练信号对多输入输出(M IMO)天线OFDM(正交频分复用)系统进行信道估计。首先推导出了该系统所需最佳导频序列、及其最小数目和最佳位置集以及信道估计的均方误差极限值,分析比较了几种内插的方法,然后提出了一种针对某些无线局域网系统的信道估计方法。仿真实验显示采用该方法得到的信道估计均方误差接近极限值,不同调制方式(BPSK、QPSK、16QAM)下M IMO-OFDM系统的误码率非常接近已知信道频响时的情况。
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| 关 键 词： | 正交频分复用 多输入输出信道 信道估计 无线局域网 |
| 文章编号： | 1673-5439（2006）05-0011-06 |
| 收稿时间： | 2006-02-17 |
| 修稿时间： | 2006-05-17 |
Channel Estimation for MIMO-OFDM System |
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| ZHOU Jian. Channel Estimation for MIMO-OFDM System[J]. JJournal of Nanjing University of Posts and Telecommunications, 2006, 26(5): 11-16 |
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| Authors: | ZHOU Jian |
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| Affiliation: | Institute of Signal and Information Processing, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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| Abstract: | This paper addresses the channel estimation problem for Multiple Input Multiple Output-OFDM systems based on pilot training sequences.We first derive the optimal training sequences,the minimum number and the optimal position sets of the pilot tones,and the MSE bound of the channel estimation.Then several interpolation techniques are compared.At last we propose a special scheme of channel estimate for some WLAN systems.Simulation results show that the MSE of the channel estimation for proposed scheme is close to the bound, and the BER performance of MIMO-OFDM system using BPSK,QPSK and 16QAM modulations is very close to the case with known channel response. |
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| Keywords: | Orthgognal frequency division multiplexing Multiple input multiple output Channel estimation WLAN |
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