Wireless Information and Power Transfer

10Harnessing Interference in SWIPT Systems

Stelios Timotheou¹, Gan Zheng²*, Christos Masouros³, and Ioannis Krikidis¹

¹KIOS Research and Innovation Center of Excellence and Department of Electrical and Computer Engineering, University of Cyprus, Cyprus

²Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom

³Department of Electronic and Electrical Engineering, University College London, WC1E 7JE, London, United Kingdom

10.1 Introduction

Recently, simultaneous wireless information and power transfer (SWIPT) via the radio frequency energy harvesting (EH) technology has emerged as a new solution for sustainable wireless network operation [1]. The first practical methods proposed for SWIPT were the time switching (TS) and power splitting (PS) methods that separate the received signal for decoding information and harvesting energy in the time and power domains [2], respectively. SWIPT in the spatial domain was introduced in [3] to decompose the multiple‐input multiple‐output (MIMO) channel and use the derived eigenchannels to either convey information or harness energy. The optimal precoding design for energy and information transfer in a multiple‐input single‐output (MISO) broadcast channel is studied in [4]. Joint information and power transfer is studied for a general K‐user MISO interference channel in [5] based on PS receivers, where semi‐definite relaxation is used to solve the precoding design. A more ...