Performance Analysis of Improved Energy Detection in Full Duplex Non-Time-Slotted Cognitive Radio

The spectral efficiency of cognitive radio (CR) can be improved by employing full-duplex (FD) systems which enables simultaneous data transmission and spectrum sensing during a given time period, over the same idle channel. Improved Energy Detection (IED) has shown a significant improvement compared to classical energy detection (CED) in half-duplex (HD). Time-slotted cognitive radio networks (CRN) are considered in most of the current works where an assumption is taken that the primary user (PU) and secondary user (SU) are perfectly synchronized. However, in real scenario PU can access and leave the frequency bands in an unsequenced manner and SU is not synchronized with the PU activity which is termed as non-time-slotted access: This paper investigates the IED scheme in full duplex cognitive radio (FDCR) for time-slotted as well as non-time slotted scenarios. The results demonstrate the significance of using IED scheme over existing methods, hence indicating remarkable improvement in the system performance. Based on the proposed scheme, simulation results show an agreement with analytical results, therefore validating the proposed scheme.