Sub-Nyquist SAR via Quadrature Compressive Sampling with Independent Measurements
Remote Sensing, 2019 This paper presents an efficient sampling system for the acquisition of synthetic aperture radar (SAR) data at sub-Nyquist rate. The system adopts a quadrature compressive sampling architecture, which uses modulation, filtering, sampling and digital ...
Huizhang Yang +3 more
doaj +1 more source
Assessment of sub-Nyquist deterministic and random data sampling techniques for operational modal analysis [PDF]
, 2016 This paper assesses numerically the potential of two different spectral estimation approaches supporting non-uniform in time data sampling at sub-Nyquist average rates (i.e., below the Nyquist frequency) to reduce data transmission payloads in wireless ...
Agathoklis Giaralis +11 more
core +1 more source
Fault Diagnosis of a Propeller Using Sub-Nyquist Sampling and Compressed Sensing
IEEE Access, 2022 The fault diagnosis of rotating machinery is generally performed using methods that employ vibration and sound. These methods are simple and accurate. However, all of these methods measure vibration data on the basis of the sampling theorem.
Yuki Kato
doaj +1 more source
Sub-Nyquist signal-reconstruction-free operational modal analysis and damage detection in the presence of noise [PDF]
, 2016 Motivated by a need to reduce energy consumption in wireless sensors for vibration-based structural health monitoring (SHM) associated with data acquisition and transmission, this paper puts forth a novel approach for undertaking operational modal ...
Giaralis, A. +2 more
core +1 more source
IEEE Access, 2018 Sub-Nyquist sampling is a common means of interfering with inverse synthetic aperture radar (ISAR) imaging, which has been validated for the feasibility of 1-D compressive sensing (CS) ISAR imaging.
Jiyuan Chen +3 more
doaj +1 more source
Wideband Power Spectrum Estimation Based on Sub-Nyquist Sampling in Cognitive Radio Networks
IEEE Access, 2019 The wideband spectrum estimation is an essential step in the wireless network. In order to avoid employing power-hungry high-rate analog-to-digital converters (ADCs), the CS-based sub-Nyquist sampling approaches are used to estimate the wideband spectrum.
Yijiu Zhao +4 more
doaj +1 more source
Sub-Nyquist sampling for short pulses with Gabor frames
EURASIP Journal on Wireless Communications and Networking, 2017 For analog signals comprised of several, possibly overlapping, finite duration pulses with unknown shapes and time positions, an efficient sub-Nyquist sampling systems is based on Gabor frames.
Cheng Wang +5 more
doaj +1 more source
Multi-channel sub-Nyquist cross-Spectral Estimation for Modal Analysis of Vibrating Structures [PDF]
, 2015 Operational modal analysis (OMA) is a widely used construction verification and structural health monitoring technique aiming to obtain the modal properties of vibrating civil engineering structures subject to ambient dynamic loads by collecting and ...
Giaralis, A. +2 more
core +1 more source
A Low Complexity Sensing Algorithm for Non-Sparse Wideband Spectrum
Sensors, 2022 The vast majority of existing sub-Nyquist sampling wideband spectrum sensing (WSS) methods default to a sparse spectrum. However, research data suggests that in the near future, the wideband spectrum will no longer be sparse.
Shiyu Ren +4 more
doaj +1 more source
Compressive power spectrum sensing for vibration-based output-only system identification of structural systems in the presence of noise [PDF]
, 2015 Motivated by the need to reduce monetary and energy consumption costs of wireless sensor networks in undertaking output-only/operational modal analysis of engineering structures, this paper considers a multi-coset analog-toinformation converter for ...
Amezquita-Sanchez +8 more
core +1 more source