Wireless Information and Power Transfer

7Fairness‐Aware Wireless Powered Communications with Processing Cost

Zoran Hadzi‐Velkov¹*, Slavche Pejoski¹, and Nikola Zlatanov²

¹Faculty of Electrical Engineering and Information Technologies, Ss. Cyril and Methodius University, Skopje 1000, Macedonia

²Department of Electrical and Computer Systems Engineering, Monash University, Clayton, VIC 3800, Australia

7.1 Introduction

Wireless powered communication (WPC) is an essential paradigm for future energy‐efficient communication systems, such as the Internet of Things (IoT), [1–3]. The WPC promises autonomy and self‐sufficiency in terms of energy of emerging low‐power systems, such as wireless sensors and IoT devices [4, 5]. As a result, the lifetime of these systems can be extensively prolonged while maintaining their performance comparable to their conventional systems counterparts. The research hype for WPC has been facilitated by recent technological advances in the efficiency of the radio‐frequency (RF) energy harvesting (EH) circuits [5], and of the energy storage circuits with rapid recharging capabilities [6, 7]. However, the RF EH circuitry is far from perfect. On one hand, the circuitry consumes additional power on top of the radiated power at the RF antenna, [8, 9]. On the other hand, the efficiency curve of the RF‐to‐direct power conversion is not linear [10, 11], resulting in a nonlinear end‐to‐end wireless power transfer.

Background. An important WPC research direction is the design and optimization of wireless ...