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Sensing-throughput tradeoff under outage detection constraint has been studied before by assuming no uncertainty in estimation of the noise power, but this might not be the case in practice for an energy detector (ED). In this paper we examine analytically the effect of spectrum sensing on both the secondary user (SU) and the primary user (PU) throughputs under outage detection probability constraint...
In this paper, we analyse (censored) cooperative spectrum sensing for cognitive radios (CRs) where, in order to save power, each CR only transmits its test statistic to a fusion center (FC) if the test statistic is greater than some threshold (ξ). One problem with this approach is that, it is possible that no test statistics may be transmitted. The solution that we propose here is to choose an optimum...
Sensing-throughput tradeoff under outage constraints has been studied before with an energy detector (ED). However, the ED does not work well in the presence of noise power uncertainty. So we study sensing-throughput tradeoff by using an autocorrelation detector (AD) for an OFDM signal. In this paper, we derive a closed form expression for the false alarm probability over both Nakagami-m and Rician...
Previous work on an energy detector (ED) has only analytically examined its performance over a flat-fading channel. But for the real environment, the channel should be assumed frequency-selective due to the high date rates. So in this paper we evaluate the performance of an ED over a frequency-selective fading channel. We show that the performance of the ED might improve because of the multipath environment...
Sensing-throughput tradeoff under outage constraints has been studied before by assuming that sensing channels are independent and identically distributed (i.i.d). However, the plausible and reasonable assumption is that the sensing channels are independent but not necessarily identically distributed (i.n.i.d). In this work, we derive a closed form expression for the false alarm probability of cooperative...
In this paper we examine the spectrum detection performance of a matched filter (MF) in the presence of two system impairments: i.e., carrier frequency offset (CFO) and phase noise (PN). The results show that in the presence of CFO, the performance of the MF may be inferior to an energy detector (ED). So we propose three spectrum sensing techniques that are robust to CFO and outperform the MF over...
Cooperative spectrum sensing has not been examined over frequency-selective Nakagami-m fading channels when an energy detector (ED) is employed. We show that cooperative spectrum sensing performance might improve more because of both the multipath environment and the Nakagami fading parameter (m). The average detection probability of cooperative spectrum sensing over a Nakagami-m frequency-selective...
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