Guangxi Key Laboratory of Image and Graphic intelligent processing Guilin University of Electronic Technology Guilin 541004 China;
Guangxi Key Laboratory of Image and Graphic intelligent processing Guilin University of Electronic Technology Guilin 541004 China;
National Local Joint Engineering Research Center of Satellite Navigation and Location Service Guilin University of Electronic Technology Guilin 541004 China;
College of Electrical and Information Engineering Hunan University Changsha 410082 China;
Guangxi Key Laboratory of Image and Graphic intelligent processing Guilin University of Electronic Technology Guilin 541004 China;
National Local Joint Engineering Research Center of Satellite Navigation and Location Service Guilin University of Electronic Technology Guilin 541004 China;