Results 41 to 50 of about 933,433 (278)
Balanced nested designs and balanced arrays
Discrete Mathematics, 2002 The interdependencies between different types of designs and arrays are studied. Basic concepts include balance, nesting of designs and symmetry. Related concepts used in constructions include Wilson theory, ordered designs, group-divisible designs and frames.
Ryoh Fuji-Hara +4 more
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IET Radar, Sonar & Navigation, 2022 Recently, sparse linear arrays have aroused significant attention because they can provide increased degrees of freedom (DOFs) and enlarged inter‐element spacing, which are the critical factors to improve the accuracy of direction of arrival (DOA ...
Fengtong Mei +4 more
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Evaluating Spatial Resolution and Channel Capacity of Sparse Cylindrical Arrays for Massive MIMO
IEEE Access, 2017 How to design antenna arrays plays an important role in wireless communications, especially when there are hundreds of antennas. In massive multiple-input and multiple-output (MIMO), if the number of antennas and RF chains are increasing, the channel ...
Na Wu, Fangqi Zhu, Qilian Liang
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, 2016 Orthogonal Arrays allow us to test various levels of each factor and balance the different factors so that we can estimate interactions as well as first order effects. There is a trade-off between how well we can sample different levels of each factor and how many interactions we are able to estimate.
Atkins, Joel, Zax, David B.
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A principled approach to programming with nested types in Haskell [PDF]
, 2009 Initial algebra semantics is one of the cornerstones of the theory of modern functional programming languages. For each inductive data type, it provides a Church encoding for that type, a build combinator which constructs data of that type, a fold ...
Ghani, Neil, Johann, Patricia
core +3 more sources
Underdetermined direction-of-arrival estimation using super nested array
The Journal of Engineering, 2019 Among various sparse-arrays, super nested array (SNA) is found to be more attractive because it can achieve large degrees-of-freedom (DOFs) and alleviate the mutual coupling. This article address the problem of direction-of-arrival (DOA) estimation under
Zheng-Ming Jiang +3 more
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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Fully additive vertical organic electrochemical transistors (vOECTs) with channel‐length of 226 nm on a 50 µm compostable substrate achieve >106 current modulation and ∼36 mS transconductance. Ion‐selective integration enables 1.1 mA dec−1 sensitivity and 36 µm detection limit, highlighting a scalable platform for sustainable electronics and ...
Giulia Frusconi +3 more
wiley +1 more source
Sparse Extension Array Geometry for DOA Estimation With Nested MIMO Radar
IEEE Access, 2017 The two-level nested array geometry, which systematically nests two uniform linear subarrays, is proved to offer O(N2) degrees of freedom (DOFs) with only N sensors.
Wang Zheng, Xiaofei Zhang, Junpeng Shi
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IEEE Access, 2020 In practice, there are many circular and non-circular signals due to multipath propagation and various modulations. Conventional direction-of-arrival (DOA) estimation in a mixture of circular and non-circular signals cannot distinguish two kind of ...
Peng Han +3 more
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