A Polarization MUSIC Algorithm Based on Cylindrical Conformal Arrays

Abstract

The directional-of-arrival (DOA) estimation method based on cylindrical conformal array is affected by the carrier curvature, and there is a problem of polarization receiving mismatch for signals with different polarization incidence. At the same time, due to the shielding of the carrier, the direction finding accuracy will decrease, and even produce direction finding error. Aiming at the polarization receiving and carrier shielding effect, a polarized MUSIC algorithm based on cylindrical conformal array is proposed, and the signal receiving model of polarization sensitive array based on cylindrical conformal array is established. Considering the carrier shielding effect, the steering vector of the signal is reconstructed to ensure the orthogonality of signal subspace and noise subspace. The polarization rank deficit MUSIC algorithm is used to estimate DOA and polarization parameters. The simulation results show that compared with the subarray split polarization MUSIC algorithm, the direction finding error of the proposed algorithm is reduced by 0.9° at a low signal-to-noise ratio of 10 dB, which has a higher signal direction finding accuracy, and the signal estimation accuracy is improved by 27.4%.

Keywords

• |signal processing|doa estimation|conformal array|steering vector reconstruction|polarized music algorithm