e BTS. By optimizing the UE position, Rank-8 transmis- sion can be achieved in the long corridor environment exhibiting LOS propagation with many reflection paths. Field Experiments of Millimeter Wave 5G Radio 11.4.1 Experimental System with Beamforming and Beam Tracking The system uses TDD with Null Cyclic Prefix Single Carrier (NCP-SC) modulation. The NCP-SC is a form of single-carrier modulation proposed for mmW broadband radio access in [30]. The PoC system consists of an access point (AP) and a user device (UD). 11.4 Field Experiments of Millimeter Wave 5G Radio 64 patch Switch antenna module switch feeder array RF module Antenna module (a) AP Tx horn antenna module Rx horn antenna RF module (b) UD Figure 11.34 Configuration of PoC transceiver: (a) AP, (b) UD. Figure 11.34 shows the configuration of the PoC transceiver. The beamforming and beam tracking are implemented in the AP. The AP and UD have identical baseband units and identical RF units except for the antenna. The AP uses a 28-dB-gain dielectric lens antenna with a switched antenna feeder configuration. The switching is accomplished in less than 1 us and is driven by the baseband processing unit synchronously with the time division multiplexing slot structure. The HPBW is approximately 3° in both azimuth and elevation. The beam can be steered approximately +4° in elevation and +17.5° in azimuth by selecting one of 64 patch antennas organized in a 4-row by 16-column rect- angular array. Figure 11.35 shows each beam's theoretical coverage area for an AP height and downtilt of 2.8 m and 10°, respectively. The UD uses a 10-dBi gain horn antenna with a HPBW of 48°. The system achieves a peak data rate greater than 2 Gbps using rate 7/8 coded 16-QAM modulation. The major radio link parameters for the transceiver are given in Table 11.10. The system bandwidth is 1 GHz, and the center frequency is 73.5 GHz. The total transmit power of the power amplifier is +23.6 dBm (0.229 W). Adaptive modulation and coding (AMC) using four MCSs is implemented. AMC is perf