Channel Model Simulation And System Performance Evaluation Of3D-MIMO In The System Of LTE-A

Along with the rapid development of wireless communication technology, users have a higher demand on the throughput and the speed of the communication system. People deeply study the huge advantage in terms of volume of the technology of multiple-input multiple-output (MIMO), and use it in communication systems as a key technology. The technology of MIMO can not only make full use of the spatial characteristics, but also increase the system capacity without increasing the transmitted power and bandwidth. The technology of MIMO is closely related to enhancing the capacity and the radio channel of the communication system, but people mainly launched for MIMO channel model based on a two-dimensional plane before3D-MIMO. In order to more accurately simulate the MIMO channel of the real environment, people began to focus on the modeling of3D-MIMO channel.It substantially adjust the probability model of the LOS/NLOS modeling in3D-MIMO channel model, and it models respectively corresponding to the paths loss equation of LOS, NLOS, and outdoor-to-indoor-case. In addition, comparing with2D-MIMO channel model,3D-MIMO channel model has these two important variables:the vertical angle of arrival (EOA) of the receiver, the vertical angle of departure (EOD) of the transmltter. Therefore, it can more accurately simulate the MIMO channel model in3D environment.In order to study of system performance3D-MIMO in-depth, we build the3D-MIMO channel simulation model in the LTE-Advanced system, combining beamforming, pre-coding, multi-user (MU) paired scheduling transmission and channel quality Indicator (CQI) feedback and other key technology programs in3D-MIMO, comparative study the signal to interference noise ratio, the average spectral efficiency, the5%of the cell edge spectral efficiency and other system performances of the UMi and UMa scene, the different antenna configurations, different pairing number of users of multi-user MIMO system, and analysis3D-MIMO system performance from many terms. Simulation results show that in different scenarios, different transmission mode, different antenna configurations, cell average spectral efficiency (ASE) and the edge spectral efficiency (ESE) of3D-MIMO are greatly improved with respect to the2D-MIMO.