Efficient Battery Usage in Wireless-Powered Cell-Free Systems with Self-Energy Recycling

Autor:	Braga Jr., Iran M., Antonioli, Roberto P., Fodor, Gabor, Silva, Yuri C. B., Freitas Jr, Walter C.
Rok vydání:	2022
Předmět:	Electrical Engineering and Systems Science - Signal Processing
Druh dokumentu:	Working Paper
Popis:	This paper investigates wireless-powered cell-free systems, in which the users send their uplink data signal while simultaneously harvesting energy from network nodes and user terminals - including the transmitting user terminal itself - by performing self-energy recycling. In this rather general setting, a closed-form lower bound of the amount of harvested energy and the achieved signal-to-interference-plus-noise ratio expressions are derived. Then, to improve the energy efficiency, we formulate the problem of minimizing the users' battery energy usage while satisfying minimum data rate requirements. Due to the non-convexity of the problem, a novel alternating optimization algorithm is proposed, and its proof of convergence is provided. Finally, numerical results show that the proposed method is more efficient than a state-of-art algorithm in terms of battery energy usage and outage rate. Comment: Accepted as a correspondance at IEEE TVT
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2212.13798 Zobrazit plný text záznamu View this record from Arxiv