Results 21 to 30 of about 7,150,681 (256)

A Novel VLSI Architecture for Multi-Constellation and Multi-Frequency GNSS Acquisition Engine

open access: yesIEEE Access, 2019
This paper proposes a novel VLSI architecture of GNSS acquisition engine based on short-time correlation combined with an FFT scheme. The architecture supports multi-constellation systems and multi-frequency satellite signals flexibly by the manner of ...
Yuheng Yang, Xiaohui Ba, Jie Chen
doaj   +1 more source

Improving Consistency of GNSS-IR Reflector Height Estimates between Different Frequencies Using Multichannel Singular Spectrum Analysis

open access: yesRemote Sensing, 2023
Previous studies of GNSS-IR mainly focused on the legacy L1C signal; the potential of modernized signals (L2C and L5Q) has not yet been fully exploited.
Jintao Lei, Wenhao Li, Shengkai Zhang
doaj   +1 more source

The Multi-Frequency Decomposition Entropy Learning for Nonlinear fMRI Data Analysis

open access: yesIEEE Transactions on Neural Systems and Rehabilitation Engineering
Functional magnetic resonance imaging (fMRI) have been widely adopted to explore the underlying neural mechanisms between psychiatric disorders which share common neurobiology and clinical manifestations.
Di Han   +4 more
doaj   +1 more source

Multi-Frequency Holographic Microwave Imaging for Breast Lesion Detection

open access: yesIEEE Access, 2019
This paper presents the development of a multi-frequency holographic microwave imaging (HMI) algorithm and investigates the feasibility and effectiveness of the proposed algorithm for breast imaging.
Lulu Wang
doaj   +1 more source

Performance Evaluation of Troposphere Estimated from Galileo-Only Multi-Frequency Observations

open access: yesRemote Sensing, 2020
The tropospheric delays estimated from the Global Navigation Satellite System (GNSS) have been proven to be an efficient product for monitoring variations of water vapor, which plays an important role in meteorology applications.
Lewen Zhao   +2 more
doaj   +1 more source

Global Navigation Satellite System Meta-Signals with an Arbitrary Number of Components

open access: yesRemote Sensing
Global Navigation Satellite System (GNSS) meta-signals are obtained when components from different frequencies are jointly processed as a single entity.
Daniele Borio
doaj   +1 more source

A Meliorated Multi-Frequency Band Pyroelectric Sensor

open access: yesSensors, 2015
This article proposes a meliorated multi-frequency band pyroelectric sensor for detecting subjects with various velocities, namely extending the sensing frequency under good performance from electrical signals. A tactic, gradually increasing thickness of
Chun-Ching Hsiao   +2 more
doaj   +1 more source

Estimation and Analysis of BDS2 and BDS3 Differential Code Biases and Global Ionospheric Maps Using BDS Observations

open access: yesRemote Sensing, 2021
Following the continuous and stable regional service of BDS2, the BDS3 officially announced its global service in July 2020. To fully take advantage of the new multi-frequency BDS3 signals in ionosphere sensing and positioning, it is essential to ...
Min Li, Yunbin Yuan
doaj   +1 more source

RBF-Neural Network Applied to the Quality Classification of Tempered 100Cr6 Steel Cams by the Multi-Frequency Nondestructive Eddy Current Testing

open access: yesMetals, 2017
This article proposes a Radial Basis Function Artificial Neural Network (RBF-ANN) to classify tempered steel cams as correctly or incorrectly treated pieces by using multi-frequency nondestructive eddy current testing.
Víctor Martínez-Martínez   +2 more
doaj   +1 more source

Tesla's multi-frequency wireless radio controlled vessel

open access: yes, 2008
A review of the Tesla’s contribution to dual-band wireless radio controlled vessel is presented. The intention of this paper is to describe multi-frequency remote controlled vessel using two transmitters and which operate a distant receiver which ...
Budimir, D.   +3 more
core   +1 more source

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