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Table 2 Main parameters with corresponding values

From: A throughput analysis of an energy-efficient spectrum sensing scheme for the cognitive radio-based Internet of things



The primary user signal, \(x\left( t\right)\)

DTV signal

The sampling frequency of the primary user signal, \(f_s\)

6 MHz

The channel noise, \(n\left( t\right)\)


The sensing time slot, \(\tau _s\)

50 \(\mu\)s

The reporting time slot, \(\tau _r\)

5 \(\mu\)s

The total time slot length, T

10 \(\mu\)s

The number of samples, \(N_x\)


The number of CR-IoT users, M


The SNR of each primary user, \(SNR_{PU}\)

10 dB

The SNR of each CR-IoT user, \(SNR_{CR-IoT}\)

\(-28\) dB

The energy consumed during the sensing phase, \(e_s\)

1 J

The energy consumed during the transmission phase, \(e_t\)

3 J

The capacity of the battery, \(e_c\)

300 J

The probability of the absence of the primary user, \(p_0\)


The probability of the presence of the primary user, \(p_1\)