Pinching Antenna-Aided Wireless Powered Communication Networks

TL;DR

This paper proposes a novel pinching antenna-aided wireless powered communication network that optimizes resource allocation and antenna placement using advanced algorithms, demonstrating significant performance improvements in line-of-sight communication scenarios.

Contribution

It introduces a new PA-WPCN model with practical considerations and develops efficient algorithms for optimizing antenna placement and resource allocation.

Findings

Optimal PA power distribution ratio is approximately 0.55-0.6.

Proposed algorithms significantly improve network sum-rate.

PA-WPCN outperforms traditional models in line-of-sight conditions.

Abstract

In this letter, we investigate a novel pinching antenna (PA)-aided wireless powered communication network (WPCN), in which multiple PAs are activated along a waveguide to establish robust line-of-sight links with multiple devices. Both time division multiple access (TDMA) and non-orthogonal multiple access (NOMA) protocols are considered in the PA-WPCN. Moreover, some practical considerations, including a proportional power model for the PAs, a waveguide transmission loss model, and a nonlinear energy harvesting model, are incorporated into the PA-WPCN. Furthermore, we formulate a sum-rate maximization problem by jointly optimizing resource allocation and PAs position. To address the challenging problem of the PAs position optimization, we propose a high-performance element-wise (EW) algorithm and a low-complexity stochastic parameter differential evolution (SPDE) algorithm. Numerical results validate the remarkable performance of the proposed PA-WPCN and the effectiveness of our algorithms, indicating that optimal performance is attained when the PA power distribution ratio of approximately 0.55-0.6.