Antenna Arrays for Line-of-Sight Massive MIMO: Half Wavelength Is Not Enough

作者：Pinchera Daniele; Migliore Marco Donald; Schettino Fulvio; Panariello Gaetano

来源：Electronics, 2017, 6(3): 57.

DOI：10.3390/electronics6030057

<jats:p>The aim of this paper is to analyze the array synthesis for 5 G massive MIMO systems in the line-of-sight working condition. The main result of the numerical investigation performed is that non-uniform arrays are the natural choice in this kind of application. In particular, by using non-equispaced arrays, we show that it is possible to achieve a better average condition number of the channel matrix and a significantly higher spectral efficiency. Furthermore, we verify that increasing the array size is beneficial also for circular arrays, and we provide some useful rules-of-thumb for antenna array design for massive MIMO applications. These results are in contrast to the widely-accepted idea in the 5 G massive MIMO literature, in which the half-wavelength linear uniform array is universally adopted.</jats:p>

• 出版日期2017-9