| An improved channel estimation with multipath search for MIMO-OFDM systems |
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| 作者姓名： | 侯晓赟 郑宝玉 徐友云 宋文涛 |
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| 作者单位： | [1]Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China [2]Department of Information Engineering, Nanjing University of Posts ＆ Telecommunications, Nanjing 210003, China [3]Institute of Communication Engineering, PLA Science and Technology University, Nanjing 210007, China |
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| 摘 要： | INTRODUCTION Multimedia wireless services require reliable high-bit-rate transmission over mobile radio channels. One of the challenges in designing such systems is the mitigation of fading propagation effects within the prescribed bandwidth and power limitations. Multi- ple-input and multiple-output (MIMO) techniques can be implemented to obtain a capacity gain in rich scattering environments without increasing the bandwidth or transmit power and/or to obtain the diversity gain to comba…
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| 关 键 词： | 信道估计 时滞估计 多输入多输出 正交频分复用 MIMO-OFDM系统 多路搜索 |
| 收稿时间： | 2004-10-26 |
| 修稿时间： | 2005-01-13 |
An improved channel estimation with multipath search for MIMO-OFDM systems |
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| Xiao-yun Hou,Bao-yu Zheng,You-yun Xu,Wen-tao Song.An improved channel estimation with multipath search for MIMO-OFDM systems[J].Journal of Zhejiang University Science,2006,7(2):149-155. |
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| Authors: | Xiao-yun Hou Bao-yu Zheng You-yun Xu Wen-tao Song |
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| Institution: | (1) Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China;(2) Department of Information Engineering, Nanjing University of Posts & Telecommunications, Nanjing, 210003, China;(3) Institute of Communication Engineering, PLA Science and Technology University, Nanjing, 210007, China |
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| Abstract: | This paper addresses the problem of channel estimation for broadband MIMO-OFDM systems. An improved channel estimator with multipath time delay detection and channel gain estimation is proposed. In the algorithm, we used the correlation of the channel taps and a well-designed adjustment scheme to increase the accuracy of the time delay detection. The most attractive advantage is that the complicated matrix calculation is replaced by search steps which can acquire the channel order and estimate the channel parameters without significantly increasing the complexity of the system. Computer simulation showed that the proposed algorithm can track the time delays adaptively and, consequently, improve the channel estimation performance. |
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| Keywords: | Channel estimation MIMO OFDM Time-delay estimation |
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