Results 221 to 230 of about 85,658 (276)

Molecular Carrier-Assisted Self-Assembly of <i>st</i>-PMMA Helical Complexes for Fluorescence Sensing of Nitroaromatics in Aqueous Medium. [PDF]

ACS Appl Mater Interfaces
Wang YH, Tseng WT, Wu KY.
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RNN-Bi-LSTM spectrum sensing algorithm for NOMA waveform with diverse channel conditions. [PDF]

Sci Rep
Kumar A, Nanthaamornphong A, Masud M.
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Novel thiosemicarbazone UV-vis chemosensor for dual pH-orthogonal detection of Fe³⁺ and Ag^. [PDF]

RSC Adv
Ali SAM, Salem ME, Ibrahim AZ, Mahmoud MAA, Abdel-Megid M, Hussein BHM.   +5 more
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Terahertz integrated sensing and mobile communications empowered by a 220-GHz-band portable device. [PDF]

Nat Commun
Wang G, Li M, Liu Q, Zang J, Li O, Du X, Xu L, Tao M, Han C.   +8 more
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Cooperative Spectrum Sensing Technique

2007 International Conference on Wireless Communications, Networking and Mobile Computing, 2007
Cognitive Radios (CRs), which sense the spectrum and implement opportunistic sharing when no licensed user is found to use it, are able to improve the efficiency of spectrum. Spectrum sensing must be firstly solved in CRs. Cooperative sensing can make good use of network resources, obtain higher gain and make the network steadier. In this paper we give
Yu Zhang, Wen-Dong Yang, Yue-Ming Cai
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Sensor Selection for Cooperative Spectrum Sensing

2008 3rd IEEE Symposium on New Frontiers in Dynamic Spectrum Access Networks, 2008
This article considers spectrum-on-demand in a cellular system. A communication system that wants to access spectrum to which it does not own a license must perform spectrum sensing to identify spectrum opportunities, and to guarantee that it does not cause unacceptable interference to the license owner.
Selen Y., Tullberg H., Kronander J.
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Sensing Confidence Level-Based Cooperative Spectrum Sensing Algorithm

Applied Mechanics and Materials, 2012
Cooperative spectrum sensing is a key technology to tackle the challenges such as fading or hidden terminal problem in local spectrum sensing of cognitive radio system. Conventional cooperative method can improve the detection performance in some sense, but increase overhead of control channel.
null Shibing Zhang, null Hailian Wang, null Jingping Mei   +2 more
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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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