Figure 11.44 shows the SNR at the UD versus its distance from the AP. The SNR shown is the maximum value measured in each time frame from the candidate beam set. The marker shows the selected beam ID. The SNR is maintained at more than 15 dB in the range from 8 to 45 m from the AP and decreases from 45 to 49 m as the distance increases. The SNR increased rapidly around 58 m and peaks at around 71 and 87 m. Beyond ~30m (slightly before point a2), the AP mainly utilizes beam #8. At the NLOS locations (e.g. 71 and 87 m), the propagation path is completed via a square pillar located between points a2 and a3. The peak SNR is 18.5 dB at 14 and 19 m, 17.3 dB at 71 m, and 15.3 dB at 87 m. Figure 11.45 shows the downlink throughput versus the UD distance from the AP. The throughput, averaged over 102.4 ms, is more than 2 Gbps from 8 to 45 m (except for a few measurements around 10 and 31 m). The throughput peaks at 1.2 Gbps around 71 and 87 m with a momentary jump to 2 Gbps at the former distance. Figure 11.46 shows the relative delay profile at point a3. The figure shows the main signal path and some additional delay paths. The delay paths are approximately 2.0, 3.3, and 18.0 ns after the main path, corresponding to 0.6, 1, and 5.4 m of the additional path length, respectively. The result suggests that some delay paths are multiple reflections from the ground and the wall. Distance (m) Figure 11.44 Downlink SNR. 11.4 Field Experiments of Millimeter Wave 5G Radio Distance (m) Figure 11.45 Downlink throughput. Delay (ns) Figure 11.46 Power delay profile at point a3. 11.4.2.3 Field Experiment in a Street Canyon Environment Figure 11.47 shows the measurement course, while Figure 11.48 includes two pictures that show the measurement environment and the AP and UD installation. The environ- ment is a street canyon with entirely LOS conditions. The course the UD traversed is from 6 to 172 m from the AP (b1 to b3 in Figure 11.47). The AP antenna height and downtilt are 2.8 and 2.7 m, respectively, and the antenna is installed on 