rence margin (dB) Noise figure (dB) SNR (dB) -10.0 Sensitivity (dBm) -94.7 -104.7 -115.4 -122.4 -119.7 -120.4 Max path loss (dB) 120.7 130.7 141.4 148.4 145.7 146.4 Max path loss with 145.7 155.7 166.4 173.4 170.7 162.4 beams (dB) 10 5G Performance Table 10.13 Downlink link budget for sub-6-GHz TDD. System parameter PDSCH 50 (Mbps) PDSCH 10 (Mbps) PDCCH Data rate (Mbps) Tx power (W) Tx power (dBm) Subcarrier spacing (kHz) Total PRBs Used PRBs Downlink share Antenna gain (dBi) Interference margin (dB) Noise figure (dB) SNR (dB) -10.0 Sensitivity (dBm) -89.0 -97.3 -103.6 -108.4 Max path loss (dB) 139.0 147.3 146.1 150.1 Max path loss with beams (dB) 164.0 172.3 171.1 172.1 10.5.2 Link Budget for Low Band FDD Low band link budgets have some differences compared to the previous link budget: FDD technology is used instead of TDD, massive MIMO beamforming is not utilized, and antenna gains are lower than at 3.5 GHz TDD bands. No SRS is needed in FDD because uplink sounding cannot be used for downlink beamforming due to different uplink and downlink frequencies. Table 10.13 illustrates an example data channel link budget for sub-1-GHz FDD for 0.5 Mbps uplink and for 10 Mbps downlink with 10 MHz bandwidth. The antenna gain with a three-sector base station is assumed to be 15 dBi. The antenna gain is typically higher, up to 18 dBi at 2 GHz bands, and even higher in the case of narrow-beam six-sector antennas. The link budget assumes a base station power of 80 W and two simultaneous users. The results show that the maximum path loss is approximately 152-154 dB. A base station antenna gain of 18 dBi would mean a path loss of 155-157 dB (Table 10.14). 10.5.3 Link Budget for Millimeter Waves We consider a relatively high data rate of 50 Mbps uplink and 500 Mbps downlink for the millimeter wave link budget. The limiting factor for coverage for such high data rates is the data channel. We assume a base station transmission power of 4 W and a noise figure of 5 dB. The beamforming antenna gain is assumed to be 26 dBi. The downlin