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Optimization of hard fusion spectrum sensing using the k-out-of-N rule is considered. Two different setups are used to derive the optimal k. A throughput optimization setup is defined by minimizing the probability of false alarm subject to a probability of detection constraint representing the interference of a cognitive radio with the primary user, and an interference management setup is considered...
Dramatic increase in demand for spectrum access opportunities has triggered a deficiency of conventional single frequency band sensing. Moreover, methods needing large amounts of observations are also inefficient. This has motivated the proposition of an adaptive multitaper spectral detector (AMTSD) for wideband sensing based on Locally Most Powerful Test (LMPT). By taking advantage of multitaper...
Spectrum sensing is a key component in cognitive radio networks, where secondary users are able to use the frequency bands when they sense that no primary users are using those bands. In this paper, we investigate an energy detector scheme used to deal with the issues related to spectrum sensing and interference avoidance for multinode cognitive radio networks. Then, an extensive analysis on cooperative...
As the analog front-end of an energy detector is highly susceptible to narrowband interference a modified energy detection scheme based on the Teager-Kaiser operator and high-pass filtering is considered. This letter analyzes the Teager-Kaiser operator output for an arbitrary number of narrowband band-pass signals having different amplitudes, center frequencies and bandwidths. The analysis reveals...
Spectrum sensing is a key enabling technology of cognitive radio. Reliable detection increases access opportunity to temporarily unused bands and prevents harmful interference to the licensed users. Due to the receiver noise, signal attenuation, and multi-path fading effect, however, it is usually not possible to determine the existence of primary signal with absolute certainty. By extracting a global...
This paper describes a transceiver design based on clustered ternary code sequences as a form of modulation in order to achieve good interference suppression with a low cost and low complexity implementation. The use of ternary code sequences allows for flexible receiver designs, so that the same transmitted signals can be detected by coherent, differential and non-coherent receivers. By applying...
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