Abstract
Abstract
This paper investigates full-duplex (FD) short-packet transmission (SPT) in underlay networks (UNs) with energy harvesting (EH) - referred to as FDSPTUNEH - to enhance spectrum utilization, reduce latency, and improve reliability, energy efficiency, and spectral efficiency. By integrating cognitive radio, radio frequency EH, FD, and SPT, FDSPTUNEH holds promise for future wireless networks. However, its broadcast nature makes it highly susceptible to eavesdropping attacks. To assess security of different multiple access (MA) schemes in FDSPTUNEH, this work develops a security analysis that accounts for practical impairments, comprising self-interference, imperfect successive interference cancellation, arbitrary fading severity, imperfect channel state information, and hardware limitations. Computer simulations confirm the accuracy of the analysis and reveal the considerable secrecy mitigation caused by these impairments. The study further shows that secrecy capability is ameliorated by optimizing the energy transmitter’s power, energy conversion efficiency, and maximum allowable interference. Notably, under these conditions, orthogonal MA demonstrates better security performance than nonorthogonal MA in FDSPTUNEH.