The Generalized Cross-Correlation Method for Time Delay Estimation of Infrasound Signal

The work described herein discusses the application of generalized cross-correlation method to time delay estimation of infrasound signal. At present, the basic cross-correlation technique is mainly used to the time delay estimation of infrasound signal. However, the estimation accuracy based on this method is not high. In order to improve the accuracy, the generalized cross-correlation method is applied in this paper. The generalized cross-correlation method can be viewed as applying a weighting or a window function to the cross-power spectrum. An improved window function is given and compared with several other proposed processors of similar form. The result shows that the estimation accuracy by the improved window function is high and the performance is stable under different signal-to-noise ratio.