Link-level Evaluation of 5G NR and Potential for Spectrum-sharing in the FR3 Band

In this paper, we show that there is an excellent possibility that 5G can be operated as a spectrum-sharing system in the 15 GHz band of the frequency range 3 (FR3). First, we consider how much spectrum resource can be secured in the 15 GHz band and show that it can ensure a 550 MHz bandwidth in many places and a 190–510 MHz bandwidth in urban areas. Next, we propose a phase noise model for the 15 GHz band, evaluate the block error rate characteristics of various sub carrier spacings (SCSs) using link-level simulation, and show no effect of phase noise if the SCS is 30 kHz or more. Finally, the interference immunity of the 5G new radio is evaluated, and it is found that the required SIR is approximately 10 dB and that each 5G base station could achieve coverage of approximately 700 m in radius.