基于3D空间信道模型的3D波束赋形技术研究

3D Beamforming Based on 3D Spatial Channel Model

移动数据流量爆炸式增长对小区吞吐量提出了更高的要求,同时智能终端的急剧增多,使终端之间的信号干扰越来越严重。传统基站天线阵列下倾角是固定的,波束之间干扰较大。随着有源天线技术的逐渐成熟,通过垂直维度的波束赋形动态改变天线的下倾角已经成为可能。本文通过分析已有的空间信道模型,研究了基于球形坐标系统的空间信道模型的建模方法,为3D动态波束赋形技术评估提供了信道基础;并且在提出的3D信道模型基础上评估了动态调整波束的下倾角可以减少用户之间的干扰,提高小区的吞吐量。

With the rapid increasment of the mobile data traffic, it is a big challenge to the cell throughout. And with the growth of the smart terminal, the interference between the terminals is more serious. The traditional antenna array of base station has the fixed down tilt for all the terminals, so the beam interferes each other. But now it is possible to adapt the antenna down tilt to the terminals according to the channel information because of the technique of the active array system. This article introduced a new modeling method to three dimension（3D） channel based on the analyse of the existing channel model. It also estimated the performance of the vertical dynamic beamforming by simulating on the 3D channel model.