| OFDM系统中基于期望最大化的半盲信道估计 |
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| 引用本文： | 田永毅. OFDM系统中基于期望最大化的半盲信道估计[J]. 北京电子科技学院学报, 2007, 15(4): 51-53 |
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| 作者姓名： | 田永毅 |
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| 作者单位： | 陕西工业职业技术学院,陕西咸阳,712000 |
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| 摘 要： | 针对传统的盲信道估计算法估计精确度低、算法复杂度高、收敛速度慢的缺点,研究基于期望最大化(EM)的半盲信道估计算法.仿真结果表明,该算法克服了盲信道估计精度低,收敛速度慢的缺点,而且在同等导频数量的情况下的估计性能较之传统的基于导频的信道估计算法提高了2dB.
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| 关 键 词： | 正交频分复用 信道估计 期望最大化 半盲 |
| 文章编号： | 1672-464(2007)04-0051-03 |
| 修稿时间： | 2007-10-25 |
Expectation Maximization Based on Semi-Blind Channel Estimation Algorithm in OFDM Systems |
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| TIAN Yong-yi. Expectation Maximization Based on Semi-Blind Channel Estimation Algorithm in OFDM Systems[J]. Journal of Beijing Electronic Science & Technology Institute, 2007, 15(4): 51-53 |
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| Authors: | TIAN Yong-yi |
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| Abstract: | Aiming at the deficiencies of high complexity, low precision and slow convergence, in the orthogonal frequency division multiplexing (OFDM) conventional blind channel estimation method, an expectation maximization based semi-blind channel estimation algorithm was researched. The simulation results show that the EM based semi-blind channel estimation algorithm can overcome these deficiencies of the conventional blind channel estimation method and yield a 2dB SNR improvement compared to the conventional channel estimation algorithms based on pilot assisted. |
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| Keywords: | orthogonal frequency division multiplexing channel estimation expectation maximization semi-blind |
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