Multitone PSK Modulation Design for Simultaneous Wireless Information and Power Transfer

TL;DR

This paper introduces a novel multitone PSK modulation scheme for simultaneous wireless information and power transfer, improving efficiency and reducing ripple voltage for IoT applications.

Contribution

It proposes a new N-tone multitone PSK modulation leveraging rectifier non-linearity, enhancing SWIPT performance for IoT networks.

Findings

Improved power conversion efficiency (PCE) demonstrated.

Reduced ripple voltage through phase shift modulation.

Simulation and measurements confirm effectiveness.

Abstract

Far-field wireless power transfer, based on radio frequency (RF) waves, came into the picture to fulfill the power need of large Internet of Things (IoT) networks, the backbone of the 5G and beyond era. However, RF communication signals carry both information as well as energy. Therefore, recently, simultaneous wireless information and power transfer (SWIPT) has attracted much attention in order to wirelessly charge these IoT devices. In this paper, we propose a novel N -tone multitone phase shift keying (PSK) modulation scheme, taking advantage of the non-linearity of integrated receiver rectifier architecture. The main advantage of the proposed modulation scheme is the reduction in ripple voltage, introduced by the symbol transmission through phases. Achievable power conversion efficiency (PCE) and bit error rate (BER) at the output are considered to measure the efficacy of the proposed modulation scheme. Simulation results are verified by the measurements over the designed rectifier circuitry. The effect of symbol phase range, modulation order, and the number of tones are analyzed. In the future, this transmission scheme can be utilized to satisfy the data and power requirements of low-power Internet of Things sensor networks.