Massive MIMO信道建模

Massive MIMO channel modeling

大规模多输入多输出(Massive MIMO)作为一个有发展前景的空中接口技术,指的是为蜂窝基站(BSs)配备大量的蜂窝基站天线元件。由于Massive MIMO天线具有非常大的尺寸,阴影衰落是可以在这些阵列的不同元件上看到的显著现象。这种现象需要被建模以具有准确的Massive MIMO信道模型。文章研究了在均匀线性Massive MIMO阵列下阴影衰落所带来的影响。应用阴影衰落的自相关模型从不相关的衰落系数产生相关的衰落系数,应用这些相关的衰落系数来获得修改的信道矩阵。并提出一些数值模拟以研究Massive MIMO阵列的阴影衰落是如何影响系统的信道容量的。

Massive multiple-input multiple-output(MIMO) as a promising air interface technology refers to the idea of equipping cellular base stations(BSs) with a huge number of antenna elements. Considering the very large size of the Massive MIMO antenna,shadow fading is a significant phenomenon that can be seen on different components of these arrays. This phenomenon needs to be modeled to have an accurate Massive MIMO channel model. The purpose of this paper is to investigate the effects of shadow fading along the elements of the uniform linear massive MIMO arrays. To this end,an autocorrelation model of shadow fading is applied to generate the correlated fading coefficients from the uncorrelated ones. Applying the associated fading coefficients to obtain a modified channel matrix,and some numerical simulations are presented to investigate how such a shadow fading along the Massive MIMO arrays can effect on the channel capacity of the system.