SWIPT‐Enabled Full‐Duplex Short Packet Communications With Nonlinear Energy Harvesting

In this work, we examine a simultaneous wireless information and power transfer (SWIPT)–enabled full‐duplex (FD) short packet communication system in which both users are equipped with a pair of transmitter–receiver antennas and can transmit and receive simultaneously. Specifically, an energy‐constrained user employs the power splitting protocol to harvest the energy of radio frequency signals transmitted by another user. To assess the reliable performance of the system, we consider two practical situations, that is, independent uplink and downlink, as well as identical uplink and downlink. For both scenarios, we derive closed‐form approximations for the overall block error rate (BLER), taking into account the influence of finite blocklength codes and nonlinear energy harvesting model. Subsequently, we analyze the effective throughput to characterize the efficiency of the considered system. Our simulation and numerical results confirm the accuracy of the theoretical approximations and demonstrate that there exists an optimal transmit power to minimize the overall BLER.