Results 41 to 50 of about 1,677,217 (347)
Beamforming Techniques for Resilient Navigation with Small Antenna Arrays
Engineering Proceedings, 2023 This paper presents a comparative benchmarking of different beamforming techniques for robust multipath and spoofing mitigation in handheld receivers equipped with a small number of antenna elements.
Lucía Pallarés-Rodríguez +4 more
doaj +1 more source
Image Processing With Dipole-Coupled Nanomagnets: Noise Suppression and Edge Enhancement Detection [PDF]
, 2017 Hardware-based image processing offers speed and convenience not found in software-centric approaches. Here, we show theoretically that a 2-D periodic array of dipole-coupled elliptical nanomagnets, delineated on a piezoelectric substrate, can act as a ...
Abeed, Md Ahsanul +4 more
core +4 more sources
IEEE Access, 2018 This paper discusses the localization problem for strictly noncircular sources based on Doppler shifts and angle of arrival (AOA). The conventional location methods, called two-step methods, first extract measurement parameters from the signals, and then
Tianzhu Qin +3 more
doaj +1 more source
A Feasibility Study for a Hand-Held Acoustic Imaging Camera
Applied Sciences, 2023 Acoustic imaging systems construct spatial maps of sound sources and have potential in various applications, but large, cumbersome form factors limit their adoption.
Danilo Greco
doaj +1 more source
Product Processing for Tapered Sparse Arrays [PDF]
arXiv, 2021 The product processor output has recently been introduced as a spatial power spectral density estimate, unifying product arrays such as coprime arrays, nested arrays, and standard uniform line arrays. The expected value and covariance function of this estimate for a white Gaussian process was derived in previous work over these various array ...
arxiv
Population and species neighbor identity impact trait–trait relationships and plant performance
Population Ecology, EarlyView.We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx +2 more
wiley +1 more source
Sparse Active Rectangular Array with Few Closely Spaced Elements [PDF]
, 2018 Sparse sensor arrays offer a cost effective alternative to uniform arrays. By utilizing the co-array, a sparse array can match the performance of a filled array, despite having significantly fewer sensors. However, even sparse arrays can have many closely spaced elements, which may deteriorate the array performance in the presence of mutual coupling ...
arxiv +1 more source
Effects of chronic browsing on life‐history traits of an irruptive large herbivore population
Population Ecology, EarlyView.This study aimed to determine the relationship between diet quality, body mass, and size (hind foot length), and female reproduction and sought to identify the mechanism by which high density under severe food limitations is maintained. Our results demonstrated that sika deer introduced to Nakanoshima Island have maintained high densities through high ...
Koichi Kaji +9 more
wiley +1 more source
Spatial resolution in electrical impedance tomography: A topical review
Journal of Electrical Bioimpedance, 2017 Electrical impedance tomography (EIT) is a relatively new imaging technique. It has the advantages of low cost, portability, non-invasiveness and is free from radiation effects.
Chitturi Venkatratnam, Farrukh Nagi
doaj +1 more source
Comparative Study between Several Direction of Arrival Estimation Methods
Journal of Telecommunications and Information Technology, 2014 In this paper a comparative study, restricted to one-dimensional stationary case, between several Direction of Arrival (DOA) estimation algorithms of narrowband signals is presented.
Youssef Khmou, Said Safi, Miloud Frikel
doaj +1 more source