Results 271 to 280 of about 88,580 (320)

Cooperative Spectrum Sensing for Dynamic Spectrum Access

2009 WRI International Conference on Communications and Mobile Computing, 2009
In cognitive networks, cooperative spectrum sensing is employed to detect the presence of primary user quickly. In this paper, we study the sensing performance of a cognitive user U1 by allowing another cognitive user U2 to act as its relay. We vary the scaling factors (used by the relay U2 to amplify its received signal) of the unconstrained scheme ...
Yunxue Liu, Dongfeng Yuan, Mingyan Jiang, Gang Jin, Shasha Ji, Xiaozhen Liu   +5 more
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Sensing-throughput tradeoff in cooperative spectrum sensing

2012 IEEE Globecom Workshops, 2012
In the current literature on cognitive radio, it is commonly assumed that fixed time durations are assigned for spectrum sensing and data transmission. It is however possible to improve the performance by finding the best tradeoff between sensing time and network throughput.
Tehrani, M. N., Uysal, Murat
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Cooperative Spectrum Sensing

2014
The main objective of this chapter is to provide a detailed technical insight into latest key aspects of cooperative spectrum sensing. We focus on fusion strategies, quantization enhancements, effect of imperfect reporting channel, cooperative spectrum sensing scheduling, and utilizing cooperatively sensed data via Radio Environment Map (REM).
H. Birkan Yilmaz, Salim Eryigit, Tuna Tugcu   +2 more
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Cooperative Spectrum Sensing with Feedback

2009 5th International Conference on Wireless Communications, Networking and Mobile Computing, 2009
One of the main objective of spectrum sensing is to detect spectrum opportunity quickly and accurately. Both of the two aspects can be improved by hardware upgrading and software optimization. In this paper, we concentrate on sensing accuracy, which, differs from previous solutions, will be enhanced by modification of network topology.
Ping Zhu, Jinglong Li, Xufa Wang
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Cooperative Fusion rules in Spectrum Sensing

2021 International Conference on Advance Computing and Innovative Technologies in Engineering (ICACITE), 2021
Cognitive radio networks (CRNs) uses Spectrum sensing(SS) for assessment the vacant spectrum in the licensed band .Cooperative spectrum sensing(CSS) is the best method for evaluation of white space when multiple secondary user work in the collaboration .All local node scan the licensed band give their decision to central fusion center.
Vivek Gupta, Shivendra Nath Sharan, Narendra S. Beniwal, Sunil Kumar Choudhary   +3 more
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Cooperative spectrum sensing with Slepian-Wolf coded cooperations

2012 IEEE International Conference on Communications (ICC), 2012
A new Slepian-Wolf coded cooperation scheme is proposed for a cognitive radio network with two secondary users (SUs) performing cooperative spectrum sensing through a fusion center (FC). The SUs sense the spectrum by measuring the energy statistics of the received signals.
Ning Sun, Guoqing Zhou, Jingxian Wu
openaire   +1 more source

Relay-Based Cooperative Spectrum Sensing

2018
In this chapter, the detection accuracy of an AF relay-based CSS approach over non-identical Nakagami-m fading channel is investigated. New exact and approximated closed-form expressions are derived for the average detection probability and the average false alarm probability over two diversity combining techniques: MRC scheme and SC scheme.
Xavier Fernando, Ajmery Sultana, Sattar Hussain, Lian Zhao   +3 more
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Deep Cooperative Sensing: Cooperative Spectrum Sensing Based on Convolutional Neural Networks

IEEE Transactions on Vehicular Technology, 2019
In this paper, we investigate cooperative spectrum sensing (CSS) in a cognitive radio network (CRN) where multiple secondary users (SUs) cooperate in order to detect a primary user, which possibly occupies multiple bands simultaneously. Deep cooperative sensing (DCS), which constitutes the first CSS framework based on a convolutional neural network ...
Woongsup Lee, Minhoe Kim, Dong-Ho Cho
openaire   +1 more source

Cooperative spectrum sensing based on the compressed sensing

2015 IEEE 14th International Conference on Cognitive Informatics & Cognitive Computing (ICCI*CC), 2015
In this paper, compressed sensing is applied to cooperative spectrum sensing to reduce the number of fused data. As the modification of OR fusion, DOR fusion is proposed as merger method to deal with information from different cognitive users. And then we analyze the relationship of detection performance and the number of users.
Yongkui Ma, Jiaxin Liu, Yulong Gao
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Optimal Number of Cooperators in the Cooperative Spectrum Sensing Schemes

Circuits, Systems, and Signal Processing, 2017
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Sriharipriya, K. C., Baskaran, K.
openaire   +2 more sources