The Key Technologies Research Of In Coordinated Multi-Piont Transmission And Reception In LTE-Advanced System

As a key technology of LTE-A system, cooperative multi point transmission (CoMP) technology can improve the cell edge user performance through multi cell coordination data transmission to enhance the receiving signal and reduce the interference. In order to maximize the system performance gain of CoMP, this paper mainly studied channel state information (CSI) feedback technology and transmission point selection technology of CoMP.The traditional CSI feedback method of CoMP does not consider the relative phase information between different transmission point, which will affect the accuracy of CSI, so as to affect system performance. To solve the problem, this paper presents a CSI feedback method based on phase information selection. The simulation results show that the proposed method can greatly improve the cell edge user throughout and CSI feedback accuracy.On the other hand, the cooperative node selection Strategy will also affect the performance gain of CoMP. This paper proposed a modified cooperative node selection Strategy based on reference signal received power measurement and network load information. The simulation results show that the proposed Strategy can improve the cell throughout more greatly than traditional strategy.