电子测量与仪器学报

邢毓华,顾力铭.脉冲噪声环境下混沌扩频时延估计算法研究[J].电子测量与仪器学报,2023,37(3):230-237

脉冲噪声环境下混沌扩频时延估计算法研究

Research on chaotic time delay estimation method in Alpha stable distributed noise environment

DOI：

英文关键词:time delay estimation impulse noise correlation entropy cable fault location

基金项目:

作者	单位
邢毓华	1. 西安理工大学自动化与信息工程学院，2. 西安市无线光通信与网络研究重点实验室
顾力铭	1. 西安理工大学自动化与信息工程学院

Author	Institution
Xing Yuhua	1. School of Automation and Information Engineering, Xi′an University of Technology，2. Xi′an Key Laboratory of Wireless Optical Communication and Network Research
Gu Liming	1. School of Automation and Information Engineering, Xi′an University of Technology

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中文摘要:

针对传统时延算法面对脉冲噪声时运算结果峰值旁瓣比较低,且存在误判点较多难以判断的问题,提出了一种新型加权高斯相关熵时延估计方法,并将该方法应用于电缆故障定位的仿真模型中。仿真结果表明,与现有的方法相比,不仅可以在脉冲噪声环境下获得良好的时延估计效果,而且在强脉冲噪声干扰下依旧能够保持较高的定位精度。在不同强度的脉冲噪声背景下,其运算结果相比其他 3 种方法主峰值旁瓣比绝对值增加 0. 020 3 dB 以上,误判峰值与故障点峰值比减少了 0. 053 9 以上,均方值误差减少了 1. 863 6 m 以上。

英文摘要:

In order to solve the problem that the peak sidelobe of the traditional time delay algorithm is relatively low when it faces impulse noise, and there are many false positives that are difficult to judge, a new weighted Gaussian correlation entropy time delay estimation method is proposed and applied to the simulation model of cable fault location. The simulation results show that, compared with the existing methods, it not only obtains a good time delay estimation effect in the impulsive noise environment, but also maintains a high positioning accuracy in the strong impulsive noise interference. In the background of pulse noise with different intensities, the calculation results show that compared with the other three methods, the absolute value of the main peak to side lobe ratio increases by more than 0. 020 3 dB, the ratio of misjudged peak to fault point peak decreases by more than 0. 053 9, and the mean square error decreases by more than 1. 863 6 m.

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