Pinching-Antenna Assisted Simultaneous Wireless Information and Power Transfer

TL;DR

This paper proposes a novel PASS-assisted SWIPT system using multiple pinching antennas on a waveguide, employing non-orthogonal access and optimization techniques to enhance simultaneous information and power transfer efficiency.

Contribution

It introduces a new PASS-assisted SWIPT architecture with optimized antenna positioning and power allocation, improving performance over traditional systems.

Findings

Significant increase in power transfer efficiency.

Effective joint optimization of antenna placement and power allocation.

Enhanced system performance demonstrated through numerical results.

Abstract

This letter introduces a novel pinching-antenna-system (PASS) assisted simultaneous wireless information and power transfer (SWIPT), where multiple pinching antennas (PAs) are strategically activiated on a waveguide to facilitate information transmission to multiple information receivers (IRs) and power transfer to multiple energy receivers (ERs) simultaneously. Leveraging the single-waveguide architecture, non-orthogonal multiple access is employed to enable the superposed transmission of information signals, eliminating the need for dedicated energy carriers by concurrently serving both the IRs and the ERs. In this letter, an optimization problem is first formulated with an objective is to maximize the sum power received at the ERs via joint optimizing the IRs power allocation and the PAs positioning. Given the challenging non-convex nature of the formulated optimization problem, it is decoupled into two sub-problems which are solved alternatively. Specifically, the power allocation subproblem is recast a convex optimization problem, and hence can be solved efficiently. Furthermore, we propose a high-precision element-wise algorithm and a low-complexity linearly decreasing weight particle swarm optimization algorithm to solve the position optimization sub-problem. The numerical results demonstrate that PAs assisted SWIPT can achieve a remarkable performance gain compared to conventional system.