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In cognitive radio networks, secondary users need to conduct spectrum sensing to properly detect the presence of primary signals that may have much lower power than noise plus interference power. In such a case, time-varying noise plus interference, which is briefly called noise uncertainty in this paper, can substantially degrade the sensing reliability of… (More)
This paper introduces two cognitive radio (CR) systems: (a) heterogeneous type CR and (b) spectrum sharing type CR regarding its definition, usage model, fundamental system architecture, and developed prototype.
This article presents the latest status and achievements of the IEEE Communication Society (ComSoc) Standards for Dynamic Spectrum Access Networks (DYSPAN), formerly IEEE Standards Coordinating Committee 41, that develops standards in the areas of dynamic spectrum access, cognitive radio, interference management, coordination of wireless systems, advanced… (More)
—Non-coherent UWB receivers provide robustness against multi path fading at low complexity. The analog front-end of these receivers, however, is susceptible to narrowband interference (NBI), thus requiring NBI mitigation capability. NBI identification and NBI parameter estimation is the first step towards implementing effective NBI mitigation. We propose an… (More)