Results 41 to 50 of about 20,382 (275)
The Intriguing Structure of Stripes in GRACE Geopotential Models
Remote Sensing, 2021 Geopotential models derived from Gravity Recovery and Climate Experiment (GRACE) mission measurements are significantly obscured by the presence of a systematic artifact, known as longitudinal stripes.
Spiros Pagiatakis, Athina Peidou
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From Theory to Practice: Sub-Nyquist Sampling of Sparse Wideband Analog Signals [PDF]
, 2009 Conventional sub-Nyquist sampling methods for analog signals exploit prior information about the spectral support. In this paper, we consider the challenging problem of blind sub-Nyquist sampling of multiband signals, whose unknown frequency support ...
Eldar, Yonina C., Mishali, Moshe
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Sub-Nyquist Radar via Doppler Focusing [PDF]
IEEE Transactions on Signal Processing, 2014 We investigate the problem of a monostatic pulse-Doppler radar transceiver trying to detect targets, sparsely populated in the radar's unambiguous time-frequency region. Several past works employ compressed sensing (CS) algorithms to this type of problem, but either do not address sample rate reduction, impose constraints on the radar transmitter ...
Bar-Ilan, Omer, Eldar, Yonina C.
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Compressive Detection Using Sub-Nyquist Radars for Sparse Signals
International Journal of Antennas and Propagation, 2016 This paper investigates the compression detection problem using sub-Nyquist radars, which is well suited to the scenario of high bandwidths in real-time processing because it would significantly reduce the computational burden and save power consumption ...
Ying Sun +5 more
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Deep Unfolded Recovery of Sub-Nyquist Sampled Ultrasound Images
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021 The most common technique for generating B-mode ultrasound (US) images is delay and sum (DAS) beamforming, where the signals received at the transducer array are sampled before an appropriate delay is applied. This necessitates sampling rates exceeding the Nyquist rate and the use of a large number of antenna elements to ensure sufficient image quality.
Alon Mamistvalov, Yonina C. Eldar
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Sub–Nyquist Frequency Efficient Audio Compression
Al-Khawarizmi Engineering Journal, 2012 This paper presents the application of a framework of fast and efficient compressive sampling based on the concept of random sampling of sparse Audio signal. It provides four important features. (i) It is universal with a variety of sparse signals.
Ahmed A. Hashim
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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
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Deep Learning Based Sub-Nyquist Modulation Recognition
2023 The 15th International Conference on Computer Modeling and Simulation, 2023 In this paper, we designed a Convolutional Neural Network (CNN) for Sub-Nyquist modulation recognition and compare the performance Long Short-Term Memory (LSTM) network and Convolutional Long Short-term Deep Neural Network (CLDNN) respectively. Unlike conventional modulation recognition task that operates with Nyquist sampled rate, the network ...
Shuangning Li +2 more
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A Design of Two Sub-Stage Square-Root Nyquist Matched Filter
IEEE Access, 2018 A pair of matched filters whose cascade response satisfies the Nyquist criterion can guarantee the inter-symbol interference (ISI)-free transmission for band-limited communication systems.
Ruwu Xiao +4 more
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IEEE Access, 2020 In recent years, wideband spectrum sensing combined with sub-Nyquist sampling and compressed sensing technology in the field of cognitive radio has received widespread attention.
Jiai He, Wei Chen, Lu Jia, Tong Wang
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