Interference evaluation of control channels under the co-existence of LTE-FDD and TD-LTE

In the co-existence scenario of LTE-FDD and TD-LTE systems, interference should be one of the most important issues for system throughput. In this work we investigated interference from user equipment (UE) to physical control channels between the two systems: LTE-FDD and TD-LTE. The results show that if the base stations of LTE-FDD and TD-LTE are placed together and they use the adjacent carriers, some of the physical control channels will experience severe adjacent channel interference and therefore unable to be demodulated correctly. We also reached the results of the interference severity of different physical control channels under different adjacent channel interference ratio (ACIR) offset value.