Results 51 to 60 of about 19,208 (154)
Frontiers in Signal ProcessingAccurate water vapor density (WVD) measurement is critical for weather models, health risk management, and industrial management among many other applications. A number of machine-learning based algorithms (e.g.
Itay Bragin +3 more
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International Journal of Distributed Sensor Networks, 2013 Cognitive radio (CR) is a regulated technique for opportunistic access of idle resources. In CR, spectrum sensing is one of the key functionalities. It is used to sense the unused spectrum in an opportunistic manner.
Ashish Bagwari, Geetam Singh Tomar
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Optimal sensing performance for cooperative and non-cooperative cognitive radio networks
International Journal of Distributed Sensor Networks, 2017 Spectrum sensing has gained new aspects with the advent of cognitive radio and opportunistic spectrum access techniques. Spectrum sensing plays a vital role in cognitive radio networks, and its reliability determines the success of transmission.
Waqas Khalid, Heejung Yu
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Opportunistic cooperative spectrum sensing based on eigenvalue ratio of random matrix
Dianxin kexue, 2020 To overcome the deficiencies of low detection probability of traditional spectrum sensing,an EROC spectrum sensing algorithm based on the eigenvalue ratio of a random matrix was proposed.Based on the random detection theory,it used double thresholds and ...
Wuji ZHANG, Shunlan LIU, Jianrong BAO
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Covariance matrix opportunistic cooperative spectrum sensing of high detection probability
Dianxin kexue, 2019 According to the problem of poor sensing performance caused by the existing spectrum sensing algorithm, the covariance matrix opportunistic cooperative (CMOC) spectrum sensing algorithm was proposed.
Shunlan LIU, Jing WANG, Jianrong BAO
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Opportunistic spectrum access algorithm based on cross-layer optimization
Tongxin xuebao, 2010 Aiming at the opportunistic spectrum access（OSA） system with periodic channel sensing,sensing activity of secondary users was modeled and analyzed with Markov process.Combining physical layer index with MAC layer index,a cross-layer performance measure ...
ZHANG Jing, ZHU Hong-bo
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Opportunistic Weather Sensing by Smart City Wireless Communication Networks
SensorsThis paper presents how the concept of opportunistic integrated sensing and communication (ISAC), focusing on weather sensing, is incorporated into wireless smart cities’ networks.
Jonatan Ostrometzky, Hagit Messer
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A Dual Threshold Based Opportunistic Spectrum Access Policy with Non-Ideal Spectrum Sensing
Dianxin kexue, 2014 To effectively improve the throughput performance of secondary user in cognitive networks, a dual threshold based opportunistic spectrum access policy was proposed, which could be implemented under the condition that secondary user had non-ideal spectrum
Xiaodong Peng +3 more
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Opportunistic Sensing in Train Safety Systems
International journal on advances in networks and services, 2011 Train safety systems are complex and expensive, and changing them requires huge investments. Changes are evolutionary and small. Current developments, like faster - high speed - trains and a higher train density on the railway network, have initiated research on safety systems that can cope with the new requirements.
Scholten, Johan, Bakker, Pascal
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Tongxin xuebao, 2013 A sensing-then-transmission slot scheduling scheme for opportunistic spectrum access under the interference constraint of primary users (PU) was proposed.First,the throughput of the cognitive radio system (CRS) with channel handoff mechanism and the ...
Jing ZHANG +3 more
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