| 基于子空间的STC-OFDM系统信道盲估计算法 |
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| 引用本文： | 薛艳明,苏广川. 基于子空间的STC-OFDM系统信道盲估计算法[J]. 北京理工大学学报, 2005, 25(7): 632-635 |
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| 作者姓名： | 薛艳明 苏广川 |
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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 |
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| 摘 要： | 针对使用2个发射天线和2个接收天线并且采用循环前缀的空时编码正交频分复用系统(STC-OFDM),提出了一种信道盲估计算法,并给出信道可被辨识的条件.该算法采用基于子空间的方法,可在2个常数的意义上确定信道冲激响应.该算法无需预编码或恒模调制.仿真结果验证了该盲估计算法的有效性.
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| 关 键 词： | 信道盲估计 空时编码 正交频分复用 子空间方法 |
| 文章编号： | 1001-0645(2005)07-0632-04 |
| 收稿时间： | 2004-09-21 |
| 修稿时间： | 2004-09-21 |
Subspace-Based Blind Channel Estimation Algorithm for Space Time Coding Orthogonal Frequency Division Multiplexing Systems |
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| XUE Yan-ming and SU Guang-chuan. Subspace-Based Blind Channel Estimation Algorithm for Space Time Coding Orthogonal Frequency Division Multiplexing Systems[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2005, 25(7): 632-635 |
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| Authors: | XUE Yan-ming and SU Guang-chuan |
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| Affiliation: | Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China;Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China |
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| Abstract: | A subspace-based blind channel estimator has been developed for space time coding orthogonal frequency division multiplexing(STC-OFDM) system with two transmit antennas and two receive antennas. A condition that guarantees multichannel to be identifiable to two ambiguity parameters is given. The method does not need precoding or constant-modulus(CM) modulating. Finally, simulation results demonstrate the performance of the proposed blind algorithm. |
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| Keywords: | blind channel estimation space time coding orthogonal frequency division multiplexing subspace-based method |
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