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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...
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...
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...
This paper presents a novel 3-D array configuration using multiple regular tetrahedra which enables high resolution 2-D DOA estimation. The proposed array configuration has better DOA estimation performance as that of the conventional 3-D array configuration for uncorrelated waves, and can be rear-ranged into the cuboid array configurationwhich can estimate DOAs of correlated waves. Performance of...
This paper presents a method of synthesizing covariance matrix elements of array input signal for high resolution 2-D Direction-Of-Arrival (DOA) estimation via antenna (sensor) switching. Antenna array generally has the same number of array elements and receiver modules which often leads large receiver hardware cost. Two of the authors have already studied a way of antenna switching to reduce receiver...
This paper presents an IIR-formed adaptive array via realizing feedback structure with DOA (Direction-Of-Arrival) estimator. The output of adaptive array is basically given as a weighted sum of multiple array inputs, which can be regarded as an FIR filtering in spatial domain. One may consider spatial IIR filtering but it is unfeasible because spatial delay element does not exist. Recalling that IIR...
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