Circular correlation method of time delay estimation
Hongyan Ma · 2005
Because the length of discrete time series is finite, the discrete series can be extended as periodic series. Therefore, the time delay estimation of a signal can be obtained based on the correlative principle of periodic series -- circular correlation. The accurate time delay estimation of a signal can be gained even if there is a great time delay because of the stationary performance of circular correlation. The generalized correlative energy diagrams and the circular correlative energy diagrams under the condition of different signal-noise ratios or different time delays are get by simulating. The comparison of the energy diagrams shows that, circular correlative time delay estimation method is better than generalized correlative time delay estimation method under the condition of low signal-noise ratio or great time delay.