Estimation algorithm of incident sources' stokes parameters and 2-D DOAs based on reduced mutual coupling vector sensor

摘要

To estimate Stokes parameters and two-dimensional (2-D) direction-of-arrival (DOA) of incident sources, a computational efficient algorithm is proposed based on reduced mutual coupling vector sensor. The biquaternion-based output model of reduced mutual coupling vector sensor is presented. The contribution in this paper is mainly on the estimation of Stokes parameters. By exploiting the information in both the covariance matrix and the pseudo-covariance matrix of the biquaternion-based sensor's output, the Stokes parameters and 2-D DOAs of partially polarized source can be extracted in closed form. Comparing with the Jone's formulation, the Stokes' formulation can characterize both completely polarized waves and partially polarized waves. Thus, the proposed algorithm is also applicable to completely polarized source. Because the proposed algorithm presents in closed form and does not require the search or iterative process, it is computationally more efficient. Simulations are used to verify the performance of the proposed algorithm.