Indoor mmWave Channel Characterization with Large Virtual Antenna Arrays

In this paper we present an indoor channel measurement campaign from 26 to 30 GHz, using a virtual antenna array. On the receiving side a $3\times 3$ spatial grid, moving in the environment, was considered. On the transmitting side we considered a massive virtual array of $21\times 21$ elements. Multipath components were extracted by means of a high resolution algorithm. The results obtained with the full massive array are compared with those obtained with a small sub-array, in order to investigate the effect of array size in channel modeling.