MIMO Pinching-Antenna-Aided SWIPT

TL;DR

This paper introduces a PASS-aided MIMO system for SWIPT that optimizes beamforming and antenna positioning to enhance data rates and energy harvesting, outperforming traditional methods.

Contribution

It proposes a novel PASS-aided MIMO SWIPT system with joint optimization of beamforming and antenna positions using an iterative AO approach.

Findings

PASS significantly outperforms conventional designs.

Joint optimization improves sum-rate and energy harvesting.

The proposed method effectively balances information transfer and power transfer.

Abstract

Pinching-antenna systems (PASS) have recently emerged as a promising technology for improving wireless communications by establishing or strengthening reliable line-of-sight (LoS) links by adjusting the positions of pinching antennas (PAs). Motivated by these benefits, we propose a novel PASS-aided multi-input multi-output (MIMO) system for simultaneous wireless information and power transfer (SWIPT), where the PASS are equipped with multiple waveguides to provide information transmission and wireless power transfer (WPT) for several multiple antenna information decoding receivers (IDRs), and energy harvesting receivers (EHRs), respectively. Based on the system, we consider maximizing the sum-rate of all IDRs while guaranteeing the minimum harvested energy of each EHR by jointly optimizing the pinching beamforming and the PA positions. To solve this highly non-convex problem, we iteratively optimize the pinching beamforming based on a weighted minimum mean-squared-error (WMMSE) method and update the PA positions with a Gauss-Seidel-based approach in an alternating optimization (AO) framework. Numerical results verify the significant superiority of the PASS compared with conventional designs.