School of Electronic Engineering, University of Electronic Science and Technology of China UESTC, Chengdu 610054, P.R.China;
School of Electronic Engineering, University of Electronic Science and Technology of China UESTC, Chengdu 610054, P.R.China;
School of Electronic Engineering, University of Electronic Science and Technology of China UESTC, Chengdu 610054, P.R.China;
Adaptive diffusion; interference terms; signal-dependent kernel function; nonstationary signal;