A method for estimating the arrival time difference of cloud lightning pulse signal

A technology of pulse signal and time difference, applied in the direction of electromagnetic field characteristics, etc., can solve the problems of false estimated value, difficult to determine threshold, large amount of calculation, etc., to achieve the effect of simple method, easy engineering implementation, and low calculation amount
CN102298097AActive Publication Date: 2011-12-28HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2011-12-28

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Abstract

The invention discloses a method for estimating thunder impulse signal Time Difference of Arrival (TDOA). The method comprises the following steps: carrying out splicing and waveform restoration on thunder impulse data blocks, and forming a thunder impulse cluster; inputting a time interval to extracting a thunder impulse cluster of each station; determining a reference detection station; calculating an impulse number of a thunder impulse cluster of A station; carrying out thunder impulse association and TDOA calculation; forming all homologous pulse pair arrays and TDOA arrays in a user assignment time interval; changing a time interval, carrying out calculation and forming new homologous pulse pair arrays and TDOA arrays. With regards to characteristics of a thunder impulse signal, the method in the invention is designed, a complete process of waveform association and homology determination, and Time Difference of Arrival (TDOA) estimation is provided, and the method is qualified toTDOA estimation requirement under white noise and color noise environments. According to the method, there is no need to look through all thunder impulses received by two detection stations, and the method has the characteristics of strong robustness, simplicity, reliability, high precision of a calculation result, and easy engineering realization.
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Description

technical field

[0001] The invention belongs to the research field of lightning monitoring and early warning technology, and relates to a cloud lightning detection and positioning system composed of a plurality of detection stations and a central station, accurately calculating the time difference between the arrival of lightning pulse signals at any two detection stations at the central station ( TDOA) approach. Background technique

[0002] The location accuracy and spatial resolution of the lightning radiation source based on the direction of arrival (DOA) of the signal will decrease with the increase of the distance between the lightning radiation source and the detection station. In contrast, the positioning accuracy and spatial resolution of the lightning radiation source location technology based on signal time difference of arrival (TDOA) will be improved with the increase of the distance between the radiation source and the detection station (when the positioning do...

Claims

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