Statistical Characteristics of Indoor Radio Propagation in NLOS Scenarios

This paper presents results of a measurement campaign carried out at a carrier frequency of 24 GHz in indoor non-line-of-sight (NLOS) scenarios. The received signal is resolved with respect to the delays, azimuths, elevations, and complex amplitudes of the incident waves. A clustering pattern in both delay and angle of arrival is visible in the data. Clusters correspond to openings such as doorways, and wall transmission. The direct path is not present in the majority of the measured scenarios. Besides a description of the physical propagation effects, we present a global characterization of the investigated radio environment suitable for stochastic channel modeling by means of global power profiles and probability density functions of the channel parameters.