… Spectrum sensing algorithms for cognitive radio devices are proposed in this paper.
Frequency correlation is exploited for obtaining better detection performance in energy detector …

… -based CR system consisting a cognitive radio BS and multiple CR users which opportunistically
utilize the spectrum licensed to some primary users (Fig. 1). The cognitive radio BS …

… packet service time analysis of opportunistic access in a CRN. The analysis can be used in
… to transmit its packet, and no spectrum handoff is performed during the packet transmission. …

… energy detection given by equation (4) is an increasing and concave function of the probability
of detection 乡d for 乡d ≥ 0.5, two properties that will be discussed further in our analysis. …

… Cognitive radio arises to be a tempting solution to the spectral congestion problem by
introducing opportunistic usage of the … Cognitive radio is the concatenation of software defined …

… We provide closed form analysis on secondary user performance, present a tight capacity
… light on the fundamental properties and design criteria on opportunistic spectrum access. …

… Abstract—This paper studies the opportunistic spectrum access (OSA) of the secondary users
in a large-scale overlay cognitive radio (CR) network. Two threshold-based OSA schemes, …

… In this section, we use Markovian analysis to compute the probability that a SB is available
provided that none of the SBs are being used by PUs; only SUs compete for SBs. We model …

… Using this analysis, we show how to quantify the sensing accuracy requirement and to
perform admission control to guarantee quality of service (QoS) for primary users in terms …

… access (OSA) protocols in the multi-channel cognitive radio networks … For mathematical
analysis, first we deal with the single… In numerical results, our mathematical analysis is verified by …