| 基于训练序列的发射分集OFDM系统的空时子空间幅度跟踪信道估计 |
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| 引用本文： | 徐信, 蔡跃明, 徐友云. 基于训练序列的发射分集OFDM系统的空时子空间幅度跟踪信道估计[J]. 电子与信息学报, 2005, 27(1): 99-103. |
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| 作者姓名： | 徐信 蔡跃明 徐友云 |
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| 作者单位： | 1. 解放军理工大学通信工程学院,南京,210007;济南军区通信网络技术管理中心,济南,250002
2. 解放军理工大学通信工程学院,南京,210007 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 该文将基于训练序列的发射分集正交频分复用(OFDM)系统视为一个多时隙系统,利用空时信道空间(波达方向)子空间和时延子空间慢变的特点,将空时信道多时隙估计技术应用到发射分集OFDM系统中,并根据衰落幅度快变的特点提出了使用自适应滤波技术的空时子空间幅度跟踪信道估计算法,明显提高了系统的信道估计精度。该文对各种算法的跟踪性能进行了仿真和分析比较。
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| 关 键 词： | 正交频分复用 训练序列 空时处理 信道估计 子空间跟踪 |
| 文章编号： | 1009-5896(2005)01-0099-05 |
| 收稿时间： | 2003-07-03 |
| 修稿时间： | 2003-01-17 |
Subspace Tracking Channel Estimation for Training-Sequence-Based OFDM Systems with Transmitter Diversity |
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| Xu Xin, Cai Yue-ming, Xu You-yun. Subspace Tracking Channel Estimation for Training-Sequence-Based OFDM Systems with Transmitter Diversity[J]. Journal of Electronics & Information Technology, 2005, 27(1): 99-103. |
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| Authors: | Xu Xin Cai Yue-ming XU You-yun |
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| Affiliation: | Institute of Communications Eng., PLA Univ. of Sci. & Tech., Nanjing 210007 China;Net. Tech. Management Center of Comm., Jinan Military Area Jinan 250002 China |
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| Abstract: | Since the channel has slowly-varying delays and directions of arrival and fast-varying faded amplitudes, benefits can be obtained by space-time processing base these channel features. In this paper, the space-time subspace and amplitude tracking algorithms using adaptive filtering technique are proposed by taking a training-sequence-based OFDM system with transmitter diversity as a multi-slot communications system and the channel estimation performance is observably improved. At the same time, this paper gives some simulations and comparisons of the performance of the different tracking algorithms. |
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| Keywords: | OFDM Training sequence Space-time processing Channel estimation Subspace tracking |
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