Results 21 to 30 of about 2,594,148 (380)

Millimeter-Wave Retro-Directive Frequency Coded Lens by Curved One-Dimensional Photonic Crystal Resonator

open access: yesIEEE Access, 2022
Innovating passive and chipless coded landmarks have recently emerged for high accuracy self-localization systems. Existing landmarks make use of the combination of retro-directive devices, corner reflectors and lenses, with a coding particle in order to
Ali Alhaj Abbas   +3 more
doaj   +1 more source

Indoor Large-Scale MIMO-Based RSSI Localization with Low-Complexity RFID Infrastructure

open access: yesSensors, 2020
Indoor localization based on unsynchronized, low-complexity, passive radio frequency identification (RFID) using the received signal strength indicator (RSSI) has a wide potential for a variety of internet of things (IoTs) applications due to their ...
Mohammed El-Absi   +5 more
doaj   +1 more source

Residual feedback suppression with extended model-based postfilters

open access: yesEURASIP Journal on Audio, Speech, and Music Processing, 2021
When designing closed-loop electro-acoustic systems, which can commonly be found in hearing aids or public address systems, the most challenging task is canceling and/or suppressing the feedback caused by the acoustic coupling of the transducers of such ...
Marco Gimm   +2 more
doaj   +1 more source

Adaptive coverage control for multi-USV system in complex environment with unknown obstacles

open access: yesInternational Journal of Distributed Sensor Networks, 2021
Aiming at the shortcomings of the existing control law based on the global information, this article studies the coverage problem of a given region in the plane using a team of USVs.
Yao Yao   +6 more
doaj   +1 more source

Indoor THz SAR Trajectory Deviations Effects and Compensation With Passive Sub-mm Localization System

open access: yesIEEE Access, 2020
In radar remote sensing, the Terahertz (THz) spectrum is presently being investigated worldwide with focus on short-range indoor and outdoor applications.
Aman Batra   +4 more
doaj   +1 more source

Fast and precise underwater transducer characterisation utilising adaptive system identification

open access: yesIET Radar, Sonar & Navigation, 2023
Characterising underwater acoustic transducers is essential to optimal signal processing in sound navigation and ranging systems. Precise characterisation allows for equalisation of the input and output hardware, resulting in improved performance of the ...
Bastian Kaulen, Gerhard Schmidt
doaj   +1 more source

A Recognition Method for Multi-Radial-Distance Event of Φ-OTDR System Based on CNN

open access: yesIEEE Access, 2021
This paper proposes a multi-radial-distance event classification method based on deep learning. To the best of our knowledge, this is the first time that the $\Phi $ -OTDR can tell how far the target event from the sensing fiber is through deep learning
Yi Shi   +3 more
doaj   +1 more source

Digital Signal Processing [PDF]

open access: yes, 1979
Contains a research summary and reports on fifteen research projects.National Science Foundation FellowshipJoint Services Electronics Program (Contract DAAG29-78-C-0020)National Science Foundation (Grant ENG76-24117)U.S.
Baggeroer, Arthur B.   +18 more
core   +1 more source

An Information-Theoretic Approach to the Chipless RFID Tag Identification

open access: yesIEEE Access, 2019
In this paper, we focus on the chipless radio-frequency identification (RFID), where the tag information bits are encoded by the peak/notch pattern appeared in the frequency spectrum of the radar cross section (RCS) of the tag. In particular, we restrict
Yanling Chen   +3 more
doaj   +1 more source

Frequency-Coded Chipless RFID Tags: Notch Model, Detection, Angular Orientation, and Coverage Measurements

open access: yesSensors, 2020
This paper focuses on the frequency coded chipless Radio Frequency Identification (RFID) wherein the tag’s information bits are physically encoded by the resonators’ notch position which has an effect on the frequency spectrum of the ...
Jahangir Alam   +4 more
doaj   +1 more source

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