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A closed-form solution for direction of arrival (DOA) estimation is presented for the spatially stretched tripole (SST) by adopting a quasi-vector-cross-product (QVCP) based scheme to deal with the mutual coupling problem. After deriving the sufficient condition for the proposed method, we design and study four specific types of SSTs in particular. Simulation results show that the proposed scheme...
In this paper, we consider the problem of estimating directions-of-arrival (DOAs) of wideband source signals. A new class of focusing matrices is proposed for use in the coherent signal subspace method. The new method does not require any preprocessing for initial values through using the cross correlation transformation (CCT). Numerical results show that when the DOAs fall within more than one group...
This paper presents a fast method for estimating directions of arrival (DOAs) of multiple narrowband noncircular signals (such as AM, ASK, and BPSK signals), which involves neither eigende-composition nor source enumeration. This method also eliminates the need for knowledge of the spatial characteristics of the circular noise and interference, by exploiting merely the conjugate spatial coherence,...
A new tensorial model is herein established for a special multi-invariant array of identically oriented ideal electromagnetic (EM) vector-sensors composed of small loops and/or short dipoles, under which a multilinear algebra based direction-of-arrival (DOA) estimation algorithm is proposed. The method provides DOA estimates (decoupled from polarization) by performing a twofold mode-projection which...
Randomly or partially polarized sources occur frequently in practical applications such as radar and modern communications. In this paper, we revisit the polarimetric smoothing technique, which is previously customized for decorrelating completely polarized coherent signals with identically oriented complete electromagnetic (EM) vector-sensors, on its applicability to randomly polarized signals and...
The problem of direction of arrival (DOA) estimation with a crossed-dipole array is addressed within the quaternionic framework, and a new ESPRIT variant, termed as quaternion-ESPRIT (Q-ESPRIT), is proposed. The proposed algorithm arranges the recorded signals into a quarternion model, and estimates the signal subspace of an array of translational invariance structure via quaternionic low-rank approximation...
A new focusing method for wideband direction-of-arrival (DOA) estimation is proposed. Based on least-square fitting (LSF), the focusing matrix is obtained by jointly exploiting the auto- and cross-correlation information embedded in the array output. Unlike the modified total least-square (MTLS) method, the proposed method does not require any preprocessing for initial values. Numerical results show...
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