Full dimension MIMO (FD-MIMO) is one of the key technologies presently studied in the 3GPP for the next generation long-term\nevolution advanced (LTE-A) systems. By incorporating FD-MIMO into LTE/LTE-A systems, it is expected that system throughput\nwill be drastically improved beyond what is possible in conventional LTE systems. This paper pre sets details on the 2D active\nantenna array design for FD-MIMO systems supporting 32 antenna elements. The FD-MIMO system allows for dynamic and\nadaptive precoding to be performed jointly across all antennas thus achieving more directional transmissions in the azimuth and\nelevation domains simultaneously, to a larger number of users. Finally, we discuss 2D antenna array port virtualization techniques\nfor creating beams with wide coverage, necessary for broadcasting signals to all users within a sector, such as the CRS (Common\nReference Signal).
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