Research on the key technology of refarming

With the explosive growth of mobile communication and the rapid development of mobile data traffic, many countries around the world began the commercial LTE process. With the further development of LTE, part of the spectrum used by the existing 2G network will be assigned to LTE. It will bring the coexistence interference between LTE and GSM systems, in order to ensure that LTE and GSM systems can both be normally operated, the development of the adjacent channel coexistence protection program is one of the key issues that need to be addressed by refarming technology. In this paper, we deeply study the adjacent channel interference between LTE and GSM systems, put forward the guard-band between the coexistence of different standard of LTE and GSM systems and lay a solid foundation of refarming technology.