Abstract
The problem of closed-form parameter estimation using a diversely polarized antenna array of arbitrary configurations is considered, under the coexistence of the circular and strictly noncircular signals used in the communication/radar systems. By incorporating the noncircularity difference and polarization diversity of the signals with the augmented polarimetric manifold decoupling, the conventional polynomial rooting polarimetric element space subspace technique is enhanced for direction-of-arrival, polarization, and noncircularity phase (for strictly noncircular sources) estimation. A subspace constraint method is also presented to improve parameter estimation of the strictly noncircular sources. Simulation results are included to illustrate the performance of the proposed methods.
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