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In wireless communications, the signal that a base station receive cannot be regarded as a point source because of the multipath propagation. A distributed source model is more suitable for the realistic scenario due to some environmental phenomenon. This paper presents subspace based method for distributed source direction of arrival estimation. Using nested sparse circular arrays, we are capable...
In this paper, we present a simplified mutual coupling matrix (MCM) for Sparse Circular Arrays (SCA) that is used for underdetermined direction of arrival (DOA) estimation. The array type used in this paper is composed of dense and sparse parts that obtains very low mutual coupling (MC). This leads to a banded-like MCM. By incorporating the MCM in the DOA estimation problem, SCA is capable of DOA...
This paper proposes a novel sparsity-aware method that can estimate more sources than the number of sensors available based on the I1 optimization technique. This approach enforces sparsity by £1 penalization and restricting error by £2-norm which enables the reconstruction of sparse signals. By using the Khatri-Rao (KR) subspace approach, we obtain an increase in the degrees of freedom (DOFs). Thus,...
One of the most important field in array signal processing is direction-of-arrival (DOA) estimation, which is applicable in wireless and mobile communications. We consider the problem of estimating the DOA for reactance-based uniform circular arrays (UCAs). In this paper, a new technique of estimating DOAs is proposed for the reactance-based UCA antenna as well as a method to calculate optimal reactance...
In this paper, the problem of direction-of-arrival (DOA) estimation for quasi-stationary signals is addressed using non-uniform circular arrays called nested circular array. We use the Khatri-Rao (KR) subspace approach to obtain an increase in the degrees of freedom. Thus, the nested circular array is capable of resolving more sources than the number of sensors. We therefore perform overdetermined...
Direction-Of-Arrival (DOA) estimation is one of the most important field in array signal processing. This paper presents a compact Reactance based Uniform Circular Array (RB-UCA) antenna system and a technique to steer nulls using optimized reactances as well as to estimate DOAs. A comparison between optimized and random reactances is presented by finding the array pattern when two interfering signals...
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