Results 201 to 210 of about 24,719 (256)

Design of A Modulated Wideband Converter for Low-Speed Sampling of Sparse Analog Signals

IEEE International Conference on Solid-State and Integrated Circuit Technology, 2022
The modulated wideband converter (MWC) is a sampling system that realizes the sub-Nyquist sampling rate by using the compressed sensing (CS) theory. This paper presents an analog front-end circuit for a modulated wideband converter, which consists of ...
Sujuan Liu, Zihao Wei, Xiaoyao Lyu
semanticscholar   +1 more source

Joint System Calibration and Signal Recovery Based on Bilinear Inverse Equation for Modulated Wideband Converter

IEEE International Conference on Electronic Measurement & Instruments, 2021
This paper considers the blind calibration and signal recovery of Modulated Wideband Converter system. The amplitude and phase errors of each channel are modeled as an unknown multiplicative diagonal matrix, and a blind calibration algorithm which only ...
Jingchao Zhang, Yuting Wang, Yinuo Su, Liyan Qiao   +3 more
semanticscholar   +1 more source

Hardware calibration of the modulated wideband converter

2014 IEEE Global Communications Conference, 2014
In the context of Cognitive Radio (CR), opportunistic transmissions can exploit temporarily vacant spectral bands. Efficient and reliable spectrum sensing is key in the CR process. CR receivers traditionally deal with wideband signals with high Nyquist rates and low Signal to Noise Ratios (SNRs).
Etgar Israeli, Shahar Tsiper, Deborah Cohen, Eli Shoshan, Rolf Hilgendorf, Alex Reysenson, Yonina C. Eldar   +6 more
openaire   +1 more source

Wideband spectrum sensing in modulated wideband converter based cognitive radio system

2011 11th International Symposium on Communications & Information Technologies (ISCIT), 2011
Wideband spectrum sensing is a fundamental problem in cognitive radio networks. In this paper, a wideband spectrum sensing procedure which consists of four steps, i.e., coarse support recovery, fine binary detection, band edges detection and clustering, for modulated wideband converter (MWC) based cognitive radio system at sub-Nyquist rate is proposed.
Shilian Zheng, Xiaoniu Yang
openaire   +1 more source

Modulated wideband converter with non-ideal lowpass filters

2010 IEEE International Conference on Acoustics, Speech and Signal Processing, 2010
We investigate the impact of using non-ideal lowpass filters in the modulated wideband (MWC) converter, which is a recent sub-Nyquist sampling system for sparse wideband analog signals. We begin by deriving a perfect reconstruction condition for general lowpass filters, which coincides with the well-known Nyquist inter-symbol interference (ISI ...
Yilun Chen, Moshe Mishali, Yonina C. Eldar, Alfred O. Hero   +3 more
openaire   +1 more source

Ultra-Wideband Signal Receiver Front-End Based on Modulated Wideband Converter Technology

IEEE International Symposium on Electromagnetic Compatibility
The increasing signal bandwidth in complex electromagnetic environments poses significant challenges for signal reception and processing. To overcome the bandwidth limitations imposed by the Nyquist sampling theorem, this paper proposes an ultra-wideband
Meiling Chen, Wei Li, Mingliang Xie, Jiahao Zhang, Binbin Su, Lei Zhang   +5 more
semanticscholar   +1 more source

Design of A Miniaturized Ultra-wideband Down Converter Module

2020 Cross Strait Radio Science & Wireless Technology Conference (CSRSWTC), 2020
In order to meet the requirements of electromagnetic countermeasure and radar systems, a miniaturized variable frequency module from 8 to 16GHz is proposed. The module adopts the modular design idea, which is implemented by the vertical overlay assembly of two independent modules, which reduces the plane size. Using multi-layer media substrate combined
Zhang Xingwen, Wang Yong, Sun Biao, Wei Wei, Xing Jun   +4 more
openaire   +1 more source

A study on mixing sequences in modulated wideband converters

2016 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2016
In this paper, we study mixing sequences of modulated wideband converters (MWC). The MWC is a sub-Nyquist sampling system which mixes an input analog signal by multiple numbers of fast mixing sequences in parallel. When the mixing sequences are random cyclic shifts of a base sequence for a memory efficiency, the system turns into random partial Fourier
Jehyuk Jang, Nam Yul Yu, Heung-No Lee
openaire   +1 more source

Quickest physical‐layer MGD anomaly detection for jamming attacks in centralized modulated wideband converter‐based ROC curve

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
semanticscholar   +1 more source

Compressed sampling signal detection method based on modulated wideband converter

2016 IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC), 2016
In order to deal with the problem when the bandwidth of the passive radars and wideband digital receivers are getting bigger and bigger, causing that the traditional signal detection methods need a high sampling rate and a large number of sampling points.
null Tao Chen, null Lizhi Liu, null Zhongkai Zhao   +2 more
openaire   +1 more source