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Operators in an APL containing nested arrays
ACM SIGAPL APL Quote Quad, 1978Formal definitions of several functions and operators for manipulating nested arrays are presented. Three operators that control the application of a function to the items or groups of items of an array are defined. In addition, the definition of current APL operators is extended to nested arrays. A proposal is presented to accept some of the ideas for
Michael A. Jenkins, Jean Michel
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Nested Array Processing for Distributed Sources
IEEE Signal Processing Letters, 2014We consider the problem of using linear nested arrays to estimate the directions of arrival (DOAs) of distributed sources and to detect the source number, where we have more sources than actual physical sensors. Angular spread, caused by the multipath nature of the distributed sources, makes the commonly used point-source assumption challenging.
Keyong Han, Arye Nehorai
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Augmented Multi-Subarray Dilated Nested Array With Enhanced Degrees of Freedom and Reduced Mutual Coupling [PDF]
IEEE Transactions on Signal ProcessingSparse linear arrays (SLAs) can be designed in a systematic way, with the ability for underdetermined DOA estimation where a greater number of sources can be detected than that of sensors.
Hua Chen, Ｗei Liu, Qing Shen
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IEEE Transactions on Information Theory
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Verónica Becher, Olivier Carton
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Verónica Becher, Olivier Carton
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High order super nested arrays
2016 IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), 2016Mutual coupling between sensors has a negative impact on the estimation of directions of arrival (DOAs). Sparse arrays such as nested arrays, coprime arrays, and minimum redundancy arrays (MRAs) have less mutual coupling than uniform linear arrays (ULAs). These sparse arrays also have a difference coarray of size O(N2), where N is the number of sensors,
Chun-Lin Liu, P. P. Vaidyanathan
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Two dimensional nested arrays on lattices
2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2011In this paper, we develop the theory of a new class of two dimensional arrays with sensors on lattice(s) which can be used to construct a virtual array of much larger size through passive processing. This structure is obtained by systematically nesting two arrays, one with sensors suitably placed on a sparse lattice and the other on an appropriately ...
Pal, Piya, Vaidyanathan, P. P.
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Improved array weighting for short nested arrays
The Journal of the Acoustical Society of America, 2019Often linear acoustic arrays are comprised of shorter nested subcomponent arrays cut for higher frequencies. This reduces costs and complexity by trading-off performance, specifically in resolution, SNR, and grating lobes. Typically each sub-aperture is processed individually, and the results incoherently combined over a frequency bandwidth of interest.
Geoffrey F. Edelmann +1 more
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Calibrating Nested Sensor Arrays With Model Errors
IEEE Transactions on Antennas and Propagation, 2014We consider the problem of direction of arrival (DOA) estimation based on a nonuniform linear nested array, which is known to provide $O(N^2)$ degrees of freedom (DOFs) using only $N$ sensors. Both subspace-based and sparsity-based algorithms require certain modeling assumptions, e.g., exactly known array geometry, including sensor gain and ...
Keyong Han, Peng Yang 0006, Arye Nehorai
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ACM SIGAPL APL Quote Quad, 1992
Following the new direction taken by the ISO Standards Committee meeting in Palo Alto, during August, 1991, an extended APL standard is considered using a nested array basis with particular features from IBM's APL2 program product. APL2 develops from ISO APL with the relaxation of two early scalar constraints.
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Following the new direction taken by the ISO Standards Committee meeting in Palo Alto, during August, 1991, an extended APL standard is considered using a nested array basis with particular features from IBM's APL2 program product. APL2 develops from ISO APL with the relaxation of two early scalar constraints.
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Bounds for asymmetric nested orthogonal arrays
Discrete MathematicsThe paper explores nested orthogonal arrays (NOAs), which are widely used in statistical experiments and fractional factorial designs when different factors require different numbers of levels. It addresses the core problem of determining minimal sizes (i.e., the smallest possible number of runs) for constructing such NOAs, under asymmetry constraints (
Xiao Lin, Shanqi Pang, Guangzhou Chen
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