PROJECT TITLE :
Empirical Stochastic Modeling of Multipath Polarizations in Indoor Propagation Scenarios
In this contribution, a stochastic modeling approach is proposed for characterizing the polarization standing of multipath elements (MPCs) in propagation channels. The $two times 2$ polarization matrix of every MPC is represented by the geometrical parameters of two ellipses, i.e., the ovality, tilt angle, and size of every ellipse, similarly because the rotating direction of electrical field intensity along the ellipse. The statistics of these parameters as well as correlation behaviors among them extracted from measurement data represent the stochastic polarization model for the propagation situation of interest. Analytical expressions are presented for the transformation from the ellipse parameters to the $2 times 2$ polarization matrix, and vice versa. Comparing with conventional polarization models addressing merely the cross-polarization ratios, the new model provides a more complete description for the per-path polarizations in terms of the power imbalance, tilting, and polarization spread. Furthermore, primarily based on multiple-input multiple-output channel measurement data collected with a hundred-MHz bandwidth and at the center frequency of 5.25 GHz, stochastic polarization models of the proposed structure are extracted for five indoor situations. These models are complementary to the present geometry-based mostly stochastic channel models for generating realistic polarization matrices for MPCs.
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