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Cooperative spectrum sensing is a key component in cognitive radio and cognitive radio network based applications. Like any other network, the spectrum sensing performance may be degraded by various sensor faults and/or security threats. These security issues can be grouped into mainly two categories: ones that do not depend on the channel state, such as device malfunctions due to hardware/software...
In cognitive radio (CR) networks, spectrum sensing has gained great importance for opportunistic spectrum access. There are many factors that affect the efficiency of spectrum sensing. High sensing accuracy can help reduce the chance of interference to primary user and improve the spectrum utility. However, high sensing accuracy requires a large amount of sensing resources including multiple collaborative...
Accurate and efficient spectrum sensing is critical in providing the cognitive radios with radio environmental awareness in order to improve the efficiency of spectrum utilization. Since narrowband sensing techniques only concentrate on one band at a time with prefixed band locations and bandwidth, wideband sensing is relatively more efficient. Considering the adverse effects of shadowing and multipath...
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