Results 11 to 20 of about 4,757,560 (195)

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, Chengzhi Chen, Shengyao Chen, Feng Xi   +3 more
doaj   +2 more sources

Sub-Nyquist Sampling OFDM Radar [PDF]

, 2023
In this paper, we propose a sub-Nyquist sampling (SNS) orthogonal frequency-division multiplexing (OFDM) radar system capable of reducing the analog-to-digital converter (ADC) sampling rate in OFDM radar without any additional manipulations of its ...
Kang, SeongHyeon, Han, Kawon, Hong, Songcheol   +2 more
core   +1 more source

Ultrafast Vector Doppler Using RF Sub-Nyquist Sampling

, 2017
International audienceBackground, Motivation and ObjectiveUltrafast ultrasound has contributed to a renewed interested in vector Doppler. Sampling RF signals at a rate 4 times the carrier frequency is the standard procedure since this rule complies with ...
Garcia, Damien, Faurie, Julia, Madiena, Craig   +2 more
core   +5 more sources

Wideband spectrum sensing with sub-nyquist sampling in cognitive radios

, 2020
Multi-rate asynchronous sub-Nyquist sampling (MASS) is proposed for wideband spectrum sensing. Corresponding spectral recovery conditions are derived and the probability of successful recovery is given.
Chiu, W-Y, Jiang, J, Nallanathan, A, Poor, HV, Sun, H   +4 more
core   +3 more sources

Sub-Nyquist spectrum sensing and learning challenge [PDF]

, 2021
Sub-Nyquist spectrum sensing and learning areinvestigated from theory to practice as a promising approachenabling cognitive and intelligent radios and wireless systemsto work in GHz channel bandwidth.
Plumbley, Mark, Parini, Clive, Gao, Y, Zhang, Han, Lambert, A, Plumbley, MD, Nallanathan, A, Ying, Zhinong, Mähönen, Petri, Ying, Z, Mahonen, P, Parini, C, Eldar, Yonina, Gao, Yue, Fuller, S, Song, Zihang, Fuller, Sean, Lambert, Andrew, Eldar, Y, Nallanathan, Arumugam, Cui, Shuguang, Song, Z, Zhang, H, Cui, S, Clive Parini, Arumugam Nallanathan, Sean Fuller, Yonina Eldar, Petri Mähönen, Han Zhang, Mark D. Plumbley, Yue Gao, Shuguang Cui, Zihang Song, Zhinong Ying, Andrew Lambert   +35 more
core   +1 more source

An Effective Reconstruction Algorithm Based on Modulated Wideband Converter for Wideband Spectrum Sensing

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
doaj   +1 more source

Low Complexity Sub-Nyquist Wideband Spectrum Sensing for Cognitive Radio

IEEE Access, 2018
In order to provide more available spectrum and quickly switchover, wideband spectrum sensing (WSS) is desirable for cognitive radio. Sub-Nyquist sampling is crucial for WSS to reduce energy and computational costs, while the existing algorithms based on
Jian Yang, Min Jia, Xuemai Gu, Qing Guo
doaj   +1 more source

A Novel Sub-Nyquist Fourier Transform Estimator Based on Alias-free Hybrid Stratified Sampling [PDF]

, 2016
This paper introduces a novel method of estimating theFourier transform of deterministic continuous-time signals from a finite number N of their nonuniformly spaced measurements.
Tarczynski, A., Bashar I. Ahmad, Ahmad, B.I., Andrzej Tarczynski   +3 more
core   +1 more source

High-Fidelity Compressive Heart Rate Tracking

IEEE Access, 2023
Recently, photoplethysmography sensors in smart watches have been frequently used to monitor heart rate. Because a photoplethysmography sensor flashes light on the skin and measures the reflected light, the rate of flashing and sampling is directly ...
Seungyoon Nam, Chanki Park, Hyunsoon Shin   +2 more
doaj   +1 more source

Deception Jamming Against ISAR With Coupled Two-Dimensional Compressive Sensing via Sub-Nyquist Sampling

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, Xiaoyi Pan, Letao Xu, Wei Wang   +3 more
doaj   +1 more source