Abstract

In this paper, a polarized Multiple-Input Multiple-Output (MIMO) channel model is proposed by using a geometrical theory based on the “two-cylinder” reference model. The modeling method reveals MIMO channel depolarization and provides a mechanism for computing cross-polarization discrimination (XPD) analytically. The XPD of single-bounced at the transmitter side mode in the polarized MIMO model is analytically discussed, and numerical simulation is conducted to address the impacts of scatterer distribution on XPD. It is found that the resulting XPD of the polarized MIMO channel depends on the MIMO sub-channel index and array orientation. This should be carefully considered in multi-polarized antenna system design.

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