Results 21 to 30 of about 2,189,605 (128)

Gerschgorin disk theorem based spectrum sensing for wideband cognitive radio [PDF]

open access: yesTongxin xuebao, 2014
Gerschgorin disk theorem (GDT) based wideband spectrum sensing methods, namely Gerschgorin likelihood estimate(GLE) algorithm and Gerschgorin disk radii iteration(GDRI) algorithm, were proposed for cognitive radios.
Bin SHEN   +3 more
doaj   +4 more sources

Implementation of spectrum sensing techniques for cognitive radio systems [PDF]

open access: yes, 2011
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This work presents a method for real-time detection of secondary users at the cognitive wireless technologies base stations.
Radhi, Nazar Mortada
core   +7 more sources

Wideband spectrum sensing based on modulated wideband converter with nested array

open access: yesIET Communications, 2021
Several spectrum sensing systems based on sub‐Nyquist sampling have been extensively studied to deal with difficulties of traditional wideband spectrum sensing in cognitive radio (CR) networks.
Qiuyue Li, Zhi Li, Jian Li
doaj   +1 more source

Wideband Spectrum Sensing Method Based on Channels Clustering and Hidden Markov Model Prediction

open access: yesInformation, 2019
Spectrum sensing is the necessary premise for implementing cognitive radio technology. The conventional wideband spectrum sensing methods mainly work with sweeping frequency and still face major challenges in performance and efficiency.
Huan Wang   +3 more
doaj   +1 more source

Performance analysis of spectrum sensing with multiple primary users [PDF]

open access: yes, 2012
The effect of multiple primary users on spectrum-sensing performance is investigated. Different models for primary user traffic are considered. The effects of different system parameters on sensing accuracy are examined.
Jiang, Lingge   +3 more
core   +1 more source

A Sequential Compressed Spectrum Sensing Algorithm against SSDH Attack in Cognitive Radio Networks

open access: yesJournal of Electrical and Computer Engineering, 2018
Spectrum sensing is one of the key technologies in wireless wideband communication. There are still challenges in respect of how to realize fast and robust wideband spectrum sensing technology.
Zhuhua Hu   +4 more
doaj   +1 more source

An Adaptive Compressive Wideband Spectrum Sensing Algorithm Based on Least Squares Support Vector Machine

open access: yesIEEE Access, 2021
Most of the compressive wideband spectrum sensing algorithms need to recover the spectrum, which require high computational complexity. Recently, a novel algorithm for compressive wideband sensing without spectrum recovery (NoR) was proposed.
Shiyu Ren   +3 more
doaj   +1 more source

Evaluation of the Effects of Compressive Spectrum Sensing Parameters on Primary User Behavior Estimation [PDF]

open access: yesPort Said Engineering Research Journal, 2021
As the Internet of Things (IoT) technology is being deployed, the demand for radio spectrum is increasing. Cognitive radio (CR) is one of the most promising solutions to allow opportunistic spectrum access for IoT secondary users through utilizing ...
Ahmed Tawfik   +2 more
doaj   +1 more source

Cognitive node selection and assignment algorithms for weighted cooperative sensing in radar systems [PDF]

open access: yes, 2009
For the radar spectrum to be shared efficiently a good sensing capability within a secondary cognitive communication system is required. In this paper, the swept radar's rotation mechanism is explored to improve the sensing performance.
Williams, C   +7 more
core   +1 more source

Decentralized Narrowband and Wideband Spectrum Sensing with Correlated Observations [PDF]

open access: yes, 2021
This dissertation evaluates the utility of several approaches to the design of good distributed sensing systems for both narrowband and wideband spectrum sensing problems with correlated sensor ...
Sun, Xingjian
core  

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