基于分数低阶矩的LETDE时延估计算法  

New time delay estimation method based on the fractional lower order moment

作　　者：郭莹[1] 邱天爽[1] 

机构地区：[1]大连理工大学电子与信息工程学院,辽宁大连116024

出　　处：《通信学报》2006年第5期12-17,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60372081;30570475;30170259);教育部博士点基金(20050141025)~~

摘　　要：依据α稳定分布噪声模型,提出了一种新的时延估计方法——基于分数低阶矩的ETDE(explicit time delay estimation)方法,简称为LETDE(low-order explicit time delay estimation)。该方法以估计误差的p阶矩作为优化准则,有效地抑制了非高斯噪声对估计值的影响。理论分析和计算机仿真实验都表明其具有良好的韧性,同时适用于高斯噪声和α稳定分布脉冲噪声下的时延估计。According to the characteristics of the α stable noise model, a novel time delay estimation method based on the least mean p-norm was proposed. The pth-order moment of error function was chosen as the optimum criteria. It removed the influence of impulsive noises on the estimated value. Theoretical analyses and computer simulations indicates that the new method is not only suitable for Gaussian noise conditions, but also very robust under the lower-order α stable noise conditions.

关 键 词：LETDE Α稳定分布 时间延迟 p阶矩 

分 类 号：TN911.7[电子电信—通信与信息系统]