Performance and Analysis on LTE System under Adjacent Channel Interference of Broadcasting System

In the progress of the standardization of the long term evolution (LTE) system, the interference between the LTE system and other systems is quite important. In China, the LTE system and the broadcasting system may deploy in the same geographical area in adjacent frequency channels around the band of 698 MHz in digital dividend spectrum, which is free up for the conversion from analog TV to digital TV. Therefore, with the deployment of frequency planning, it is urgent to ensure the coexistence between the LTE system and the broadcasting system. This paper is aiming at analyzing the interference from the broadcasting system to the LTE system with different distances between the two systems and different offset distances with Monte Carlo simulations. We calculate the required adjacent channel interference ratio values to achieve 5% throughput loss. Simulation results show that the interference situation of LTE uplink is much more severe than LTE downlink and should be paid more attention. Additionally, it can be improved by locating the broadcasting system transmitter at the LTE system´s cell edge.