Channel Modeling and Over-the-Air Signal Quality at 3.5 GHz for 5G New Radio

With the next generation of mobile communication being trialled across world, 5G New Radio (NR) promises to provide a flexible radio interface that fits diverse range use cases. As trials and pilots progress, propagation studies are required evaluate electromagnetic (EM) effects for NR signals. In this article, signals used over-the-air (OTA) error vector magnitude (EVM) within line-of-sight (LoS) rural/urban environment. For same receiver locations, time dispersion loss were measured via root mean square (RMS) delay spread path loss. The transmitter-receiver distance investigated ranged from 60 m 450 m. From measurement campaign, exponent (PLE) using directional antenna at was 1.98, 1.82 with an omnidirectional antenna. (RMSE) floating intercept/close-in (FI/CI) models 4.96/4.74 3.84/3.23 receivers. cross polar configuration showed significant increase dependency on observed. route, 24 ns 35 measurements. regards EVM, 16 64-QAM transmissions robust along entire route antennas, whereas 256-QAM worked in locations where there minimal obstruction path. average EVM (%) 16, 64 4.5/5.3/3.9 3.4/4.3/3.6 antennas. OTA results also show (as receiver) significantly improves obtainable signal quality reduces outages higher modulation schemes. presented, system designers can design efficient receivers, estimate coverage adequately provision services sub-6 GHz frequency band.