Research On Interference Suppression In LTE Systems

In the LTE system, the Orthogonal Frequency Division Multiplexing can ensure that the sub-carriers in the cell obtained internal users have mutually orthogonal frequency, and it can effectively solve the interference within the cell, almost negligible, so we can focus the center of gravity on a research study on inter-cell interference.This paper studies the soft frequency reuse interference suppression in LTE.Firstly, it contrast SFR and UFR, and the research program focused on the reuse factor of one and three,then it analyzes the cell system throughput and cell edge throughput which can distinguish between cell center users and cell edge users efficiently and correctly. Firstly we introduced them, then compare the simulation of SFR and UFR.Simulation results show that the SFR scheme can guarantee the system throughput under the premise of effectively improve the cell edge throughput, but it will reduce the use of spectrum, so we can introduces a SFR scheme in which FRF is seven. It can raise the peak rate greatly for users in edge areas of a cell and increase system capacity by combining with adaptive resource scheduling strategy.This paper studies the introduction of relay technology to LTE interference suppression effect,Firstly relay technology were introduced, and analyzed the characteristics of the relay technology and its inter-cell interference suppression role in the introduction of a simple relay coordination with the communication model. It describes a simple relay collaboration with the communication model in LTE,then the model and the algorithm is simulated.The simulation results show that adding a relay node without changing the system BER situation effectively improve cell edge user throughput.This paper proposes an inter-cell interference suppression algorithm based on the JP-CoMP. The influence on the algorithm brought by the generation methods of the coordinative cluster is considered and compared with simulation results at the system simulation platform.The simulation results show that the inter-cell interference suppression algorithm based on the JP-CoMP can better suppress the intercell interference and improve the cell edge throughput.