T-DVB Services Coexistence with IMT-advanced Service

Due to spectrum scarcity and emerging various wireless applications, coexistence and sharing between wireless systems becomes a recently critical issue. At WRC-07, 790-862 MHz is allocated for the coming fourth generation (4G) or IMT-Advanced on a co-primary basis along with existing Terrestrial-Digital Video Broadcasting (T-DVB). Therefore, coexistence and sharing requirements such as separation distance and frequency separation coordination must be achieved in terms of both co-channel and adjacent channel frequencies. The two coexisted systems are analyzed by Spectral Emission Mask (SEM) model and interference to noise ratio (I/N) of -6 dB as a standard coexistence criterion for the interference coming from broadcasting base station into base station of IMT-Advanced represented by mobile WiMAX as a candidate technology for 4G. Finally, possible intersystem interference mitigation techniques are suggested.