A Modified Self-adaptive Time Delay Estimation Algorithm Based on Fourth-order Cumulants
Zhang Jiang-li · Journal of the China Railway Society · 2006
Time delay estimation is widely used in sonar and radar applications.A modified time delay estimation of the non-Gaussian signal in the presence of unknown Gaussian spatially non-correlated or correlated noises has been put forward.New normal equations based on fourth order statistics of the sensor measurements are estimated,from which a new adaptive algorithm for time delay estimation is derived.To obtain the accurate time delay estimation,this method can effectively depress Gaussian noises and can trace the time delay at each instant to yield a unique solution to time delay estimation.Simulation examples are presented to illustrate the effectiveness of this algorithm.