[1]张端金,张中华,郭建军,等.基于四阶累积量的时延估计新方法[J].郑州大学学报(工学版),2010,31(01):106.[doi:10.3969/j.issn.1671-6833.2010.01.025]
　ZHANG Duanjin,ZHANG Zhonghua,GUO Jianjun,et al.A new method for time delay estimation based on fourth-order cumulants[J].Journal of Zhengzhou University (Engineering Science),2010,31(01):106.[doi:10.3969/j.issn.1671-6833.2010.01.025]

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基于四阶累积量的时延估计新方法()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

31卷

期数:

2010年01期

页码:

106

栏目:

出版日期:

2010-01-30

文章信息/Info

Title:

A new method for time delay estimation based on fourth-order cumulants

作者:

张端金; 张中华; 郭建军; 等.

郑州大学信息工程学院,河南,郑州,450001

Author(s):

ZHANG Duanjin; ZHANG Zhonghua; GUO Jianjun; etc

DOI:

10.3969/j.issn.1671-6833.2010.01.025

文献标志码:

A

摘要:

针对无线电定位中的时延估计问题,考虑接收信号为窄带信号以及背景噪声为高斯分布的情况下,将四阶累积量的一维切片作为高阶统计量,结合希尔伯特变换,给出一种新的时延估计方法.该方法对相关峰值进行了锐化处理,提高了估计精度.与广义互相关法相比,该算法可有效抑制空间相关高斯噪声的影响,计算量小,易于实现.仿真结果表明了该方法的有效性.

Abstract:

Aiming at the delay estimation problem in radiopositioning, considering that the received signal is a narrowband signal and the background noise is Gaussian distribution, a new delay estimation method is presented by taking the one-dimensional slice of the fourth-order cumulative quantity as a higher-order statistic, combined with the Hilbert transform. This method sharpens the relevant peaks and improves the estimation accuracy. Compared with the generalized cross-correlation method, the algorithm can effectively suppress the influence of space-related Gaussian noise, and the calculation amount is small and easy to implement. The simulation results show the effectiveness of the proposed method.

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