Results 41 to 50 of about 2,189,605 (128)
A Recursive Algorithm for Joint Time-Frequency Wideband Spectrum Sensing [PDF]
, 2015 —In wideband spectrum sensing, secondary or un-licensed users take signal measurements over a given wide spectrum band and attempt to determine subbands for which the spectrum is idle and thus available for use.
Brian L. Mark, Joseph M. Bruno
core +1 more source
Least entropy based randomized strategy for wideband spectrum sensing with cooperation
Tongxin xuebao, 2010 To study the strategy for wideband spectrum sensing in cognitive radio system,the relation between the accuracy of channel state estimation and entropy was analyzed from the perspective of information entropy.And then a least entropy based randomized ...
MAI Lei-xin, QIN Xiao-wei, DAI Xu-chu
doaj +2 more sources
Compressive sensing based maximum-minimum subband energy detection for cognitive radios
Heliyon, 2020 To satisfy the growing spectrum demands of emerging wireless applications, cognitive radios have been considered as a viable option. It enables dynamic spectrum access opportunistically using wideband spectrum sensing (WSS) methods to discover the ...
Desalegn T. Dagne +2 more
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Mixed-Signal Parallel Compressive Spectrum Sensing for Cognitive Radios
International Journal of Digital Multimedia Broadcasting, 2010 Wideband spectrum sensing for cognitive radios requires very demanding analog-to-digital conversion (ADC) speed and dynamic range. In this paper, a mixed-signal parallel compressive sensing architecture is developed to realize wideband spectrum sensing ...
Zhuizhuan Yu +5 more
doaj +1 more source
IEEE Access, 2019 Cognitive radio (CR) is considered to be an effective approach to eliminate the dilemma of spectrum shortage. To meet the ever-increasing demands of instant and accurate spectrum sensing in CR with wideband and multi-frequency-slots, a novel wideband ...
Peihan Qi, Yi Du, Danyang Wang, Zan Li
doaj +1 more source
Exploiting wideband spectrum occupancy heterogeneity for weighted compressive spectrum sensing
, 2017 Compressive sampling has shown great potential for making wideband spectrum sensing possible at sub-Nyquist sampling rates. As a result, there have recently been research efforts that aimed to develop techniques that leverage compressive sampling to ...
Zorba, Nizar +7 more
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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 +4 more
core +3 more sources
A Robust Method Based on Deep Learning for Compressive Spectrum Sensing
SensorsIn cognitive radio, compressive spectrum sensing (CSS) is critical for efficient wideband spectrum sensing (WSS). However, traditional reconstruction algorithms exhibit suboptimal performance, and conventional WSS methods fail to fully capture the ...
Haoye Zeng +3 more
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Wideband and Multiband Temporal Sensing for Opportunistic Spectrum Access [PDF]
, 2018 Opportunistic spectrum access is a proposed solution to the problem of increasing scarcity of radio resources. In certain bands, spectrum is utilized extremely inefficiently by the licensed, or primary, users.
Bruno, Joseph M
core +1 more source
An adaptive approach for integrating primary user behavior in compressive spectrum sensing
EURASIP Journal on Wireless Communications and NetworkingCompressive sensing (CS) has been widely used to sense the wideband spectrum with fewer measurements by taking advantage of radio spectrum underutilization.
Ahmed A. Tawfik +2 more
doaj +1 more source