| 一种新的基于判决反馈的OFDM系统信道估计方法 |
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| 引用本文： | 苏岚,曹雪虹,郭士伟.一种新的基于判决反馈的OFDM系统信道估计方法[J].南京邮电大学学报(自然科学版),2008,28(3). |
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| 作者姓名： | 苏岚 曹雪虹 郭士伟 |
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| 作者单位： | 1. 南京邮电大学通信与信息工程学院,江苏南京,210003
2. 南京邮电大学通达学院,江苏南京,210003 |
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| 基金项目： | 南京市留学回国人员科技活动项目
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江苏省自然科学基金
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江苏省教育厅青蓝工程中青年学术带头人培养对象计划 |
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| 摘 要： | 提出了一种基于判决反馈机制的信道估计方法,采用少量导频估计出初始信道信息,再从接收端检测出的符号中选取一组包含了少量错误的符号作为准导频,反馈到信道估计器,与初始的导频一起构成数量更多的导频序列,经过几次迭代,达到提高信道估计精度的目的.为提高初始估计的精度,信道估计采用了一种频域分集的方法.计算机仿真表明,在多径瑞利衰落信道下,本文的方法可以在较低的复杂度下有效地提高信道估计的精度,在MMSE接收条件下,系统具有良好的误比特率(BER)性能.
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| 关 键 词： | 判决反馈 信道估计 OFDM |
A Novel Channel Estimation Method Based on Decision Feedback for OFDM Systems |
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| SU Lan,CAO Xue-hong,GUO Shi-wei.A Novel Channel Estimation Method Based on Decision Feedback for OFDM Systems[J].Journal of Nanjing University of Posts and Telecommunications,2008,28(3). |
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| Authors: | SU Lan CAO Xue-hong GUO Shi-wei |
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| Institution: | SU Lan1,CAO Xue-hong2,GUO Shi-wei1 1.College of Communicationg , Information Engineering,Nanjing University of Posts , Telecommunications,Nanjing 210003,China2.College of TongDa,China |
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| Abstract: | An iterated channel estimation method for OFDM systems based on decision feedback is proposed.The initial channel state information(CSI) is estimated by inserting a few pilots and used for signal detection.Some detected symbols involving a few errors and the original pilots are sent back to the channel estimator in order to refine the channel estimation again.Meanwhile,the frequency domain diversity method is exploited to decrease the initial channel estimation errors.Simulation shows that the proposed algo... |
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| Keywords: | Decision feedback Channel estimation Orthogonal frequency division multiplexing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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