Results 241 to 250 of about 32,777 (288)
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International Journal of Communication Systems, 2019
In wireless communication systems, physical‐layer security menaces have evolved from jammers. Jammers, due to their furtive nature, make wireless communication systems vulnerable.
Ahmed Moumena
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In wireless communication systems, physical‐layer security menaces have evolved from jammers. Jammers, due to their furtive nature, make wireless communication systems vulnerable.
Ahmed Moumena
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Wideband Photonic Microwave SSB Up-Converter and I/Q Modulator
Journal of Lightwave Technology, 2017A wideband photonic microwave single sideband (SSB) up-converter and an in-phase/quadrature (I/Q) modulator are proposed and experimentally demonstrated. The intermediate frequency (IF) and local oscillator (LO) signals are applied to the submodulators of a dual-parallel Mach–Zehnder modulator (DPMZM) for frequency up-conversion, and the phase of the ...
Yongsheng Gao +5 more
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2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014
Modulated wideband converter (MWC) based sub-Nyquist sampling can be used for wideband spectrum sensing in cognitive radio networks. In this paper, a method is proposed for detecting whether the reconstruction process is unsuccessful due to non-sparse spectrum in MWC based wideband spectrum sensing to avoid causing harmful interference to primary users.
Shilian Zheng, Xiaoniu Yang
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Modulated wideband converter (MWC) based sub-Nyquist sampling can be used for wideband spectrum sensing in cognitive radio networks. In this paper, a method is proposed for detecting whether the reconstruction process is unsuccessful due to non-sparse spectrum in MWC based wideband spectrum sensing to avoid causing harmful interference to primary users.
Shilian Zheng, Xiaoniu Yang
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Advanced Video and Signal Based Surveillance, 2018
This paper presents an implementation of the Modulated Wideband Converter (MWC) compressed sensing scheme using Commercial Off-The-Shelf (COTS) low-pass filter (SXLP-36+ from Mini-Circuits®) for spectrum surveillance in order to reconstruct a wideband ...
L. Nguyen +5 more
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This paper presents an implementation of the Modulated Wideband Converter (MWC) compressed sensing scheme using Commercial Off-The-Shelf (COTS) low-pass filter (SXLP-36+ from Mini-Circuits®) for spectrum surveillance in order to reconstruct a wideband ...
L. Nguyen +5 more
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Analysis and Signal Recovery of Modulated Wideband Converter with Gain Mismatch
Applied Mechanics and Materials, 2013Recently, a sub-Nyquist sampling system, called as Modulated Wideband Converter (MWC), for sparse analog signals is proposed in [1]. In this paper, the gain mismatch, i.e. the gain variation of the mixers, the low pass filters and the low-date rate ADCs, in the MWC is, firstly, analyzed.
You Hua Wang, Jian Qiu Zhang
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Compressed sensing in array signal processing based on modulated wideband converter
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014Nyquist theory is a serious obstacle to the wideband signal processing, which has been broken by compressed sensing theory. Modulated wideband converter can sample wideband signals with subNyquist frequency. In array signal processing, to bring down the sampling rate for the wideband signal is especially an essential issue.
Yi Zhou-wei +3 more
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Theoretical Analysis on Noise Performance of Modulated Wideband Converters for Analog Testing
2020 IEEE 29th Asian Test Symposium (ATS), 2020The Modulated Wideband Converter (MWC) is one of the promising sub-Nyquist sampling architectures for sparse wideband signal sensing, cognitive radio applications and so on. In order to design an MWC-based RF receiver that meets a target RF specification, noise figure (NF) of the MWC has to be well-defined by its design properties. This paper reviews a
Zolboo Byambadorj +5 more
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Circuits, systems, and signal processing, 2023
Sujuan Liu, Xiaoyao Lyu, Chengkai Cui
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Sujuan Liu, Xiaoyao Lyu, Chengkai Cui
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Hardware Design of DC-3GHz Compressed Sensing Receiver Based on Modulated Wideband Converter
IEEE International RF and Microwave Conference, 2018Modulated Wideband Converter (MWC) is a sub-Nyquist sampling structure suitable for wideband sparse signals. Based on MWC, this paper designs a DC-3 GHz Compressed Sensing (CS) receiver system with commercial devices.
Peng Wang, F. You, Songbai He, Peng Hao
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A New Compensating Method of Non-Ideal Lowpass Filters in Modulated Wideband Converter
International Conference on Instrumentation and Measurement, Computer, Communication and Control, 2018There are several non-ideal factors in the hardware implementation of Modulated Wideband Converter (MWC), which is an efficient sub-Nyquist system for sampling the sparse multiband signals.
Ning Fu +4 more
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