Ray Tracing simulations of indoor channel spatial correlation for Physical Layer Security

The goal of this work is to establish the accuracy of ray tracing to simulate the radio channel in a Physical Layer Security scenario, where two legitimate users try to take advantage of the intrinsic properties of the channel to generate a shared secret key inaccessible to an eavesdropper. A 3D Ray-Tracing software, including a diffuse scattering model, is employed to simulate spatial correlations in an indoor environment at the frequencies of 2.4 and 5GHz. Measurements, performed with a Vector Network Analyzer, are used to assess the validity of simulated results.