Ultra-Reliable Cooperative Short-Packet Communications with Wireless Energy Transfer

摘要

We analyze a cooperative wireless communication system with finite blocklength and finite battery energy, under quasi-static Rayleigh fading. Sourceand relay nodes are powered by a wireless energy transfer (WET) process, whileusing the harvested energy to feed their circuits, send pilot signals toestimate channels at receivers, and for wireless information transmission(WIT). Other power consumption sources beyond data transmission power areconsidered. The error probability is investigated under perfect/imperfectchannel state information (CSI), while reaching accurate closed-formapproximations in ideal direct communication system setups. We considerultra-reliable communication (URC) scenarios under discussion for the nextfifth-generation (5G) of wireless systems. The numerical results show theexistence of an optimum pilot transmit power for channel estimation, whichincreases with the harvested energy. We also show the importance ofcooperation, even taking into account the multiplexing loss, in order to meetthe error and latency constraints of the URC systems.