College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;
College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;
Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin 541004, China;
College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;
College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;
Guangxi Key Laboratory of Automatic Detecting Technology and Instruments, Guilin University of Electronic Technology, Guilin 541004, China;
College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China;