Results 1 to 10 of about 451,634 (158)

Robust Adaptive Beamforming Algorithm for Sparse Array Based on Covariance Matrix Reconstruction Technology

open access: yesInternational Journal of Antennas and Propagation, 2022
When the array structure of the sparse arrays (SA) cannot be determined, the existing beamforming algorithms designed according to specific formations such as coprime arrays (CA), nested arrays (NA), etc. will fail.
Yuxi Du   +4 more
doaj   +1 more source

Fast Tensor-Based Joint Estimation for Time Delay and Angle of Arrival in OFDM System

open access: yesInternational Journal of Antennas and Propagation, 2022
Nowadays, the joint estimation of time delay (TD) and angle of arrival (AOA) using conventional vector structure suffers from the considerable complexity of multidimensional spectrum search.
Jinzhi Du   +4 more
doaj   +1 more source

A Novel Sparse Array for Localization of Mixed Near-Field and Far-Field Sources

open access: yesInternational Journal of Antennas and Propagation, 2021
As we all know, nested array can obtain a larger array aperture and more degrees of freedom using fewer sensors. In this study, we not only designed an enhanced symmetric nested array (ESNA), which achieved more consecutive lags and more unique lags ...
Yinsheng Wang   +4 more
doaj   +1 more source

Instantaneous Bandwidth Enhancement for Variable Inclination Continuous Transverse Stub Antenna

open access: yesInternational Journal of Antennas and Propagation, 2022
In this paper, a method was developed to achieve the instantaneous bandwidth enhancement of a variable inclination continuous transverse stub (VICTS) antenna.
Zheng Liu   +5 more
doaj   +1 more source

RFID technology, systems, and applications [PDF]

open access: yesJournal of Network and Computer Applications, 2011
Editorial ; Quan Z.Sheng, Sherali Zeadally, Aikaterini Mitrokotsa, Zakaria ...
Quan Z. Sheng   +3 more
openaire   +2 more sources

PROJECT MANAGEMENT OF CROPS GROWING TECHNOLOGICAL SYSTEMS

open access: yesВісник Національного технічного університету «ХПÌ». Серія: Стратегічне управління, управління портфелями, програмами та проектами, 2016
The technological system of crops growing is determined. The project environment is uncategorized. The features of project management of technological systems are determined.
Павло Миронович ЛУБ   +3 more
doaj   +1 more source

Joint Estimation for Time Delay and Direction of Arrival in Reconfigurable Intelligent Surface with OFDM

open access: yesSensors, 2022
Recently, the joint estimation for time delay (TD) and direction of arrival (DOA) has suffered from the high complexity of processing multi-dimensional signal models and the ineffectiveness of correlated/coherent signals.
Jinzhi Du   +4 more
doaj   +1 more source

THE MECHANISM OF FORMATION OF ERRORS MACHINING OF THE PISTON AND CONNECTING ROD

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2016
Researches allowing to expose the mechanism of error formation of the axial piston sizes of ship small-sized diesels rods for the purpose of improvement of production process technology and stabilization of geometrical parameters are given.
N. K. Sanaev
doaj   +1 more source

Algebraic distributed source localisation algorithm using TDOA and AOA measurements

open access: yesThe Journal of Engineering, 2019
This study proposes an algebraic distributed source localisation algorithm that combines time difference of arrival (TDOA) and angle of arrival (AOA) measurements. The proposed algorithm uses AOAs to remove the unknown parameters in TDOA equations caused
Zhixin Liu   +5 more
doaj   +1 more source

A DOA Estimation Method for Sparse Array Based on DFT Spectrum of Received Signals

open access: yesIEEE Access, 2022
In the direction of arrival (DOA) estimation of sparse array received signals, the estimation accuracy of the grid search method in compressed sensing is improved with the increase of over-complete redundant dictionary elements.
Liye Zhang   +4 more
doaj   +1 more source

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