Results 171 to 180 of about 561,026 (203)
Some of the next articles are maybe not open access.
A Calibration for the Modulated Wideband Converter Using Sinusoids With Unknown Phases
2017 Ninth International Conference on Ubiquitous and Future Networks (ICUFN), 2017Based 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.
Heung-No Lee, Jehyuk Jang
exaly +2 more sources
Wideband Spectrum Sensing in Modulated Wideband Converter Based Cognitive Radio System
2011 11th International Symposium on Communications & Information Technologies (ISCIT), 2011Wideband 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
exaly +3 more sources
Sub-band equalization of modulated wideband converter for improved dynamic range performance
2017 25th Signal Processing and Communications Applications Conference (SIU), 2017 In this work, we propose a new method to improve the dynamic range performance of the Modulated Wideband Converter (MWC), which is multi-channel sampling system for digitizing wideband sparse signals below the Nyquist limit without loss of information by using compressive sensing techniques.
Ali Bugra Korucu +3 more
openaire +5 more sources
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
exaly +2 more sources
Signal Processing, 2018 International audienceThis paper focuses on non-ideal filters in a Modulated Wideband Converter (MWC) scheme. The MWC is a system that can sample a sparse wideband signal at sub-Nyquist rate.
Luat Nguyen +2 more
exaly +2 more sources
Electronics, 2022 International audienceThe Modulated Wideband Converter (MWC) is a blind sub-Nyquist sampling system used especially to monitor wideband spectrum. This system can be realized by existing analog components.
Anthony Fiche +2 more
exaly +2 more sources
Hardware calibration of the modulated wideband converter
2014 IEEE Global Communications Conference, 2014In 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 +6 more
openaire +2 more sources
A study on mixing sequences in modulated wideband converters
2016 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2016In 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 +2 more sources
Design of A Miniaturized Ultra-wideband Down Converter Module
2020 Cross Strait Radio Science & Wireless Technology Conference (CSRSWTC), 2020In 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 +4 more
openaire +1 more source
An Average-Phase Calibration Method for the Sensing Matrix of a Modulated Wideband Converter
Signal ProcessingSujuan Liu, Xiaoyao Lyu
exaly +3 more sources