Results 191 to 200 of about 24,719 (256)

Fundamental limits of light-wave sensing for non-contact respiration monitoring. [PDF]

Biomed Opt Express
Martin B, Islam MZ, Gotcher C, Martinez T, Ekin S, O'Hara JF.   +5 more
europepmc   +1 more source

Redundancy-free integrated optical convolver for optical neural networks based on arrayed waveguide grating. [PDF]

Nanophotonics
Zhang S, Zhou H, Wu B, Jiang X, Gao D, Xu J, Dong J.   +6 more
europepmc   +1 more source

A comprehensive review of metasurface-assisted direction-of-arrival estimation. [PDF]

Nanophotonics
Huang M, Li R, Zou Y, Zheng B, Qian C, Jin H, Chen H.   +6 more
europepmc   +1 more source

An ADPLL-Based GFSK Modulator with Two-Point Modulation for IoT Applications. [PDF]

Sensors (Basel)
Kim NS.
europepmc   +1 more source

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Implementation of Mixing Sequence Optimized Modulated Wideband Converter for Ultra-Wideband Frequency Hopping Signals Detection

IEEE Transactions on Aerospace and Electronic Systems, 2020
Frequency hopping (FH) communications are widely used in Satcom systems. The latest FH systems have exceeded 3 GHz with hop rates up to 100 000 hops/s. Traditional spectrum sensing systems hardly monitor such signals.
Ang Li, H. Huan, R. Tao, Qiong Liu
semanticscholar   +2 more sources

Wideband Spectrum Sensing using Modulated Wideband Converter by Revised Orthogonal Matching Pursuit

2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT), 2018
Spectrum sensing is a major function of Cognitive radio. Wideband spectrum sensing has been a focal area of research and development for the past few decades. Conventional wideband spectrum sensing techniques used Nyquist sampling rates. The major drawback associated with these techniques is its high computational complexity attached to the required ...
A. P, K. Gopakumar
semanticscholar   +2 more sources

A Fine Spectrum Sensing Procedure based on Modulated Wideband Converter

2019 International Conference on Communication and Signal Processing (ICCSP), 2019
For the effective implementation of Cognitive Radio (CR) networks, it is important to perform wideband spectrum sensing rapidly and efficiently. Due to the wide frequency bands involved in spectrum sensing, sub-Nyquist sampling schemes have gained ...
Sneha Gem Mathew, S. Chris Prema
semanticscholar   +2 more sources

A calibration for the modulated wideband converter using sinusoids with unknown phases

2017 Ninth International Conference on Ubiquitous and Future Networks (ICUFN), 2017
Based on the compressed sensing theory, the sub-Nyquist samplers are proposed to acquire the wideband signals. Among them, although the modulated wideband converter (MWC) is theoretically well designed, a calibration is needed for the implementation.
Jeong Park, Jehyuk Jang, Heung-no Lee
semanticscholar   +2 more sources

An Optimized Circulant Measurement Matrix Construction Method Used in Modulated Wideband Converter for Wideband Spectrum Sensing

2018 IEEE 87th Vehicular Technology Conference (VTC Spring), 2018
Modulated wideband converter (MWC) is a blind undersampling system for sparse multiband signal. By the available hardware and compressed sensing method, it can realize energy-efficient wideband spectrum sensing under sub-Nyquist sampling rate.
Jian Yang, Min Jia, Xuemai Gu, Qing Guo
semanticscholar   +2 more sources

A Mixing Sequence Optimization Method for Focused Compressed Sampling Based on Modulated Wideband Converter

IEEE Transactions on Circuits and Systems - II - Express Briefs, 2022
In modulated wideband converter (MWC), all signals are aliased and sampled indiscriminately, which reduces the reconstruction accuracy of target signal.
Shi Wen, Peng Wang, Weiheng Jiang, Mingyu Li   +3 more
semanticscholar   +1 more source