This research was supported in part by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2012R1A2A2A01046220)and the MSIP (Ministry of Science, ICT & Future Planning), Korea, under the Convergence-ITRC (Convergence Information Technology Research Center) support program (NIPA-2014-H0401-14-1005) supervised by the National IT Industry Promotion Agency (NIPA). The authors would like to thank Prof. Ness B. Shroff at The Ohio State University in US and Prof. Jin-Ghoo Choi at Yeungnam University in Korea for their valuable comments and numerical contributions