Beijing Advanced Innovation Center for Imaging Technology;
Capital Normal University;
Beijing 100048;
China;
Flatley Discovery Lab;
Boston 02129;
USA;
School of Communication and Information Engineering;
Shanghai University;
Shanghai 200072;
China;
Department of Information Science and Intelligent Systems;
University of Tokushima;
Tokushima 7708506;
Japan;
phase-locked; loop; ECG; adaptive; filter; power; line; cancella-tion;