SCOT weighted time delay estimation method under impulsive noise environment
Qiu Tian-shuang · Journal of China Institute of Communications · 2005
The traditional smoothed coherence transform(SCOT)weighted time delay estimation degenerated under impulsive noise environment.A new time delay estimation method was proposed based on fractional lower order covariance according to the theory of the fractional lower order statistics and the impulsive characteristics of fractional lower order α-stable noises.Furthermore,in order to avoid the estimation of parameters of impulsive noises,alternative methods based on nonlinear transform were proposed.Theoretic analysis and computer simulations indicate that the new algorithms perform robustly under both Gaussian and non-Gaussian impulsive noise conditions.