Can TV and communication system coexist in same frequency band? Applying back-scattering technique to TV receiver antenna

In this paper, the frequency sharing technique between existing TV and new wireless communication systems are discussed. By adding a load modulation function to TV receiver antenna, the secondary system, i.e. new wireless communication system, can identify the interference channel between secondary system and primary TV receiver. The simulation has been carried out and it is found that the fairly high capacity is obtained even though the secondary system needs to suppress the interference to primary TV receiver.