一种基于幅值加权的互相关时延估计新方法

doi:10.16180/j.cnki.issn1007-7820.2019.08.010

Abstract

Abstract:

A new amplitude weighting method was proposed to improve the cross correlation method for time delay estimation in passive TDOA location. Amplitude weighting used the amplitude-frequency characteristic of the input signal to amplify the amplitude at the frequency of the cross-correlation power spectrum function signal, and relatively weakened the influence of the small peak of the power spectrum outside the signal frequency point, thereby approximating the ideal cross-correlation power spectrum conditions for accurate estimation of the delay value, which further improved the accuracy of time delay estimation. The simulation results showed that the amplitude weighted cross correlation method could calculate the time delay more accurately than the traditional cross correlation method when the signal-to-noise ratio was low. This method had a certain reference value for the research of time delay estimation.

Key words: time delay estimation, signal to noise ratio, power spectrum function, amplitude weighted, cross-correlation, estimation accuracy

CLC Number:

TN911

ZHANG Yu,YAN Tianfeng,XU Fuxin,LI Shuai,ZHENG Li. A New Method Based on Amplitude Weighted Cross-correlation Time Delay Estimation[J].Electronic Science and Technology, 2019, 32(8): 46-50.

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A New Method Based on Amplitude Weighted Cross-correlation Time Delay Estimation

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