Spectrum Sensing in Mobile Full-Duplex Cognitive Radio

In this paper, a mobile secondary user (SU) having in-band full-duplex (FD) ability is considered. We investigate the effect of the SU mobility and residual self-interference (RSI) on sensing performance. The fading channel between primary and secondary users is considered to be time-selective frequency flat Rayleigh fading channel. The RSI channel is also assumed to be Rayleigh fading channel. We analytically derive the closed form expressions for false alarm and detection probabilities. Moreover we analyse the receiver operating characteristics (ROC) and total error rate (TER) performance using energy detector (ED). The results show that the sensing performance degrades with increase in secondary user's speed and also due to RSI. The results are verified through Monte Carlo simulations.