d (2) omnidirectional (OMNI) antenna configuration. In the OMNI antenna configuration, eight rod antennas are used, with four rod antennas being attached at 90° angles for polarization. The baseband part has been implemented on a baseband unit commercially used for Long Term Evolution (LTE), sized 3U (U = Unit) of a 19-inch rack, with the new base- band card supporting 100 MHz, eight-layer MIMO, and 2.5 Gbps throughput. In this trial, four baseband cards have been used. The baseband system is connected to the RF system via sixteen 10.1 Gbps Common Public Radio Interfaces (CPRIs) (four QSFP) and is also connected to a generic IA server hosting Layer 2 and application generating traffic via four 10G Ethernet links. 11.3.2 Field Experiments The field experiments were conducted in a shopping mall environment in the Rop- pongi Hills high-rise complex in Tokyo and a long corridor environment in the NTT DOCOMO R&D center in Yokosuka, Japan. The shopping mall has complex reflection paths within its NLOS areas. The long corridor environment exhibits LOS propagation with many reflection paths. 11.3 Field Experiments with Sub-6-GHz 5G Radio 100 m Figure 11.27 Measurement course (shopping mall). 11.3.2.1 Field Experiment in a Shopping Mall Environment Figure 11.27 shows the measurement course and environment for the field experiments. The environment is a shopping mall and has complex reflection paths including NLOS propagation conditions. The length of the course is approximately 108 m. The propa- gation is LOS from 8 to 40 m from the BTS and NLOS from 40 to 112 m. The antenna height and downtilt of the BTS are 2.0 m and 0°, respectively. The BTS is located at the side of a walkway and directed toward the UE. The UE moves on the course along the walkway. The antenna height and the average speed of the UE are 1.7 m and 2.4 km/h, respectively. The speed is assuming walking speed in the shopping mall. The UE antenna direction is tangential to the course in the direction of the BTS. Figure 11.28 shows the CDF of the downlink th