1. Hanoi Pedagogical University 2,Faculty of Physics,Hanoi,Vietnam
2. Hoa Binh University,Hanoi,Vietnam
3. University of Transport and Communications,Department of Telecommunications Engineering,Hanoi,Vietnam
4. Institute of Information Technology, Vietnam Academy of Science and Technology,Hanoi,Vietnam
5. Phenikaa University,Faculty of Electrical and Electronic Engineering,Hanoi,Vietnam,12116