Joint Estimation of Angle, Doppler and Polarization Parameters for Narrowband MIMO Multipath Channels Using Polarization Sensitive Antenna Arrays

A novel subspace based joint angle of arrival (AOA), angles of departure (AOD), Doppler shifts and polarization states parameter estimation scheme for polarized two-dimensional (2D) double directional MIMO multipath channels is proposed in this paper. A narrowband system with non-polarized uniform linear array at the transmitter and cross-polarized antenna array at the receiver is considered. The proposed algorithm perform a simple transformation on the estimated channel state information (CSI) matrix in such a manner that multidimensional ESPRIT can be utilized to exploit the translational invariance in the angle, Doppler and polarization dimensions. Simulation results show that the proposed algorithm can accurately estimate the AOA, AOD, Doppler shifts and polarization angles of the multipath channel even for closely spaced scattering sources. Key–Words: Polarization, MIMO, Multidimensional ESPRIT, Multipath Parameter Estimation