Indoor Corridor Channel Measurements and Characterization in the Upper Mid-Band

This paper presents a preliminary characterization of the indoor channel in the upper mid-band. Narrowband measurements are launched in corridors taking into consideration line-of-sight (LOS) and non-line-of-sight (NLOS) propagation scenarios at diverse frequencies between 7 and 20 GHz. The path loss, the shadow fading, and the K-factor properties of the channel are measured and assessed. According to the results, the measured path loss can be accurately forecasted by the Close-In (CI) empirical model. Simple linear relationships are delivered, tailored to characterize the path loss exponent, the shadow fading and the K-factor variation versus frequency. The latter parameter degrades linearly versus frequency exhibiting negative values in NLOS scenarios and at frequencies above 8 GHz.