The Research Of Inter-cell Interference Cancellation For The Downlink Of LTE-A System

LTE-Advanced system which based on orthogonal frequency division multiplexing (OFDM) can eliminate intra-cell interference, but still can't mitigate inter-cell interference (ICI). Coordinated Multi-Point transmission/reception (CoMP) is one of the candidate techniques for LTE-Advanced systems to increase the cell average and cell edge user throughput in the both uplink and downlink:. Although CoMP naturally increases system complexity, it has potentially significant capacity and coverage benefits, making it worth a more detailed consideration. In this paper, we present our views on CoMP system which is based on BBU+RRU mode, describs in detail with CoMP system workflow related content. We obtain channel model which is based on the analysis of system model, and describe the principle of pre-coding algorithm to eliminate inter-cell interference.Then the detection of the received signal is analyzed. First, we simulated the differences of enhancing the average cell throughput between CoMP system and the traditional non-cooperative system, showing the great advantages of CoMP system. Second, based on the simulation of the ZF/MMSE/BD+SVD precoding algorithms and TPF/Max C/I scheduling algorithm, we propose a new pre-coding algorithm MT and a new scheduling algorithm DS which is based on data flow scheduling. What's more, simulation was carried out, which obtain the tremendous advantages of MT pre-coding and the DS scheduling mechanism with the purpose of improving the average cell throughput and cell edge user throughput.