Results 21 to 30 of about 281 (164)
Augmented improved nested array with enhanced degrees of freedom and reduced mutual coupling effect
Electronics Letters, 2023 To reduce mutual coupling of an improved nested array (INA), the authors propose an augmented improved nested array (AINA) by splitting the dense subarray of the INA into two parts and rearranging one of them on the right side of the last element in the ...
Weichuang Yu +3 more
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X-ray diffraction from dislocation half-loops in epitaxial films. [PDF]
J Appl CrystallogrX‐ray diffraction from dislocation half‐loops consisting of a misfit segment with two threading arms extending from it to the surface is calculated by the Monte Carlo method.X‐ray diffraction from dislocation half‐loops consisting of a misfit segment with two threading arms extending from it to the surface is calculated by the Monte Carlo method.
Kaganer VM.
europepmc +2 more sources
Sparse Billboard and T-Shaped Arrays for Two-Dimensional Direction of Arrival Estimation
IEEE Open Journal of Signal Processing, 2023 In two-dimensional direction of arrival (2D-DOA) estimation, planar arrays can estimate the elevation and azimuth angles simultaneously. However, many planar array topologies such as billboard, L-shaped, T-shaped, and 2D nested arrays suffer from mutual ...
Saleh A. Alawsh +4 more
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Direction of Arrival Estimation Using Augmentation of Coprime Arrays
Information, 2018 Recently, direction of arrival (DOA) estimation premised on the sparse arrays interpolation approaches, such as co-prime arrays (CPA) and nested array, have attained extensive attention because of the effectiveness and capability of providing higher ...
Tehseen Ul Hassan +3 more
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The role of difference coarrays in correlation subspaces
2017 51st Asilomar Conference on Signals, Systems, and Computers, 2017 The concept of correlation subspaces was recently introduced in array processing literature by Rahmani and Atia. Given a sensor array, its geometry determines the correlation subspace completely, and the covariance matrix of the array output is ...
Chun-Lin Liu +3 more
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International Journal of Antennas and Propagation, 2022 Direction of arrival (DOA) estimation for non-Gaussian signals using three-level nested array (THL-NA) is investigated in this paper. Motivation from larger consecutive degree of freedom (DOF) and array aperture, the THL-NA is proposed, which can take ...
Sha Shi +4 more
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Bayesian compressive sensing for DOA estimation using the difference coarray
2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2015 In this paper, we utilize Bayesian Compressive Sensing (BCS) for direction-of-arrival (DOA) estimation based on the coarray. This enables estimation of more sources than the number of physical antennas. We adopt the covariance vectorization technique to construct the received signal vectors of coarrays for both fully and partially augmentable arrays ...
Xiangrong Wang +3 more
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An Effective Off-Grid DOA Estimation Algorithm Using Difference Coarrays with Limited Snapshots
Applied SciencesA significant advantage of off-grid direction-of-arrival (DOA) estimation algorithms using difference coarrays is their ability to resolve more sources than the number of physical sensors.
Yanan Ma +4 more
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Range-Dependent Beamforming Using Space-Frequency Virtual Difference Coarray
2021 IEEE Radar Conference (RadarConf21), 2021 Frequency diverse array (FDA) combines frequency and spatial diversities and, thereby, generates a time-range-angle-dependent beampattern, which is attractive in many application scenarios. Incorporating coprimality in designing the array geometry and the frequency offset yields coprime FDA, whose spatial resolution and degrees of freedom are enhanced.
Shengheng Liu +3 more
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Robustness of Difference Coarrays of Sparse Arrays to Sensor Failures - Part II: Array Geometries
IEEE Transactions on Signal Processing, 2019 In array processing, sparse arrays are capable of resolving O(N^2) uncorrelated sources with N sensors. Sparse arrays have this property because they possess uniform linear array (ULA) segments of size O(N^2) in the difference coarray, defined as the ...
Liu, Chun-Lin, Vaidyanathan, P. P.
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