MUSIC based DOA finding and polarization estimation using USV with polarization sensitive array antenna

Abstract

Since the universal steering vector (USV) which is equivalent to the array element pattern or the array manifold has successfully been applied to estimate direction of arrival (DOA) of incident wave based on multiple signal classification (MUSIC) algorithm using the array antenna with arbitrary geometry, it is further applied to joint estimation of DOA and polarization without separating the signal received by array antenna into two orthogonal polarizational components in this paper. The formulation of joint estimation of DOA and polarization proposed by Schmidt is modified with using two USVs of E/sub /spl theta// and E/sub /spl Phi// components. The simulation results using array antenna consisting of one monopole and 2 planar inverted-F antenna (PIFAs) mounted on a conducting plane and the array antenna consisting of 7 monopoles mounted on a conducting box demonstrate the effective the proposed estimation method. The comparison between the estimation results of DOA obtained by two USVs of E/sub /spl theta// and E/sub /spl Phi// and those obtained only by USV of E/sub /spl theta// or by USV of E/sub /spl Phi// indicates that accuracy of DOA estimation by two USVs is similar to that obtained by one USV when the incident electromagnetic wave has only E/sub /spl theta// or E/sub /spl Phi// component, and also indicates that the estimation by two USVs is valid and has more satisfactory accuracy when incident electromagnetic waves have different polarizations.