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一种改进OFDM定时同步算法 被引量：3

An Improved Algorithm for OFDM Symbol Timing Synchronization
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摘要 最大似然算法即ML算法的计算复杂度低,且其以循环前缀与OFDM最后一部分符号的相关性进行OFDM同步估计,节省了系统的带宽资源,因而,ML算法是OFDM同步算法中很经典的算法之一.为改善ML算法在低信噪比时的同步性能,提出了一种新的OFDM同步算法.该算法对ML算法的定时测度函数进行改进,所得的新算法不仅保留了原ML算法的优势,且改善了原ML算法在低信噪比下的均值误差和均方误差. Maximum likelihood algorithm （ML algorithm） has low computational complexity, and it imple- ments OFDM synchronization estimation by the correlation between cyclic prefix and the last part symbols of OFDM, which saves the bandwidth resource of the system. So ML algorithm is one of classical OFDM synchroni- zation algorithms. A novel algorithm is proposed by improving the timing metric function of ML algorithm. The proposed method has the advantages of ML algorithm and improves the mean error and MSE of ML algorithm at low SNR.
作者 李艳苹 张礼勇
机构地区 哈尔滨理工大学测控技术与通信工程学院 黑龙江工程学院电子工程系
出处 《哈尔滨理工大学学报》 CAS 2012年第3期62-64,共3页 Journal of Harbin University of Science and Technology
基金 国家自然科学基金(60372104)
关键词 ML算法 OFDM 定时同步 定时测度 ML algorithm OFDM timing synchronization timing metric
分类号 TN91 [电子电信—通信与信息系统]
  • 相关文献

参考文献11

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二级参考文献31

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共引文献8

同被引文献27

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引证文献3

二级引证文献4

哈尔滨理工大学学报
2012年 第3期

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