Performance Analysis of Fluid Antenna Multiple Access Assisted Wireless Powered Communication Network

2025-01-23

AI Summary

This work addresses the low data transmission reliability in fluid antenna-assisted wireless powered communication networks (WPCNs). To this end, it pioneers the integration of fluid antenna technology into WPCNs and proposes an adaptive port selection mechanism for single-fluid-antenna terminals. Under block-fading channels, four port selection strategies—deterministic static (DSPS), deterministic evolving (DEPS), uniform static (USPS), and uniform evolving (UCPS)—are designed. Leveraging the step-function approximation (SFA) technique, a closed-form analytical framework is established to characterize the uplink and downlink outage probabilities, along with their theoretical lower bounds. Numerical results validate the accuracy of the derived analytical expressions. This study not only fills a critical theoretical gap regarding fluid antenna applications in WPCNs but also provides quantifiable design guidelines and fundamental performance limits for port selection, thereby enabling systematic performance optimization.

Technology Category

• Planning, Routing, and Scheduling: Scheduling under Uncertainty
• Reasoning under Uncertainty: Stochastic Optimization
• Multiagent Systems: Agent Communication

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Data management and stream processing for Web, mobile and wireless applications
• Graph Algorithms and Modeling for the Web: Efficient manipulation of static and dynamic Web-related graphs
• Responsible Web: Measurement, analysis, and circumvention of Web censorship

Abstract

This paper investigates a novel fluid antenna multiple access (FAMA)-assisted wireless powered communication network (WPCN), in which a hybrid access point (HAP) equipped with multiple fixed position antennas (FPAs) provides integrated data and energy transfer (IDET) services towards low-power devices that are equipped with a single fluid antenna (FA), while the low-power devices use harvested energy to power their own uplink transmission. Using the block correlation channel model, both the downlink and uplink wireless data transfer (WDT) outage probabilities are analyzed under specific port selection strategies, including downlink signal-to-interference ratio-based port selection (DSPS) strategy, downlink energy harvesting power-based port selection (DEPS) strategy, uplink signal-to-noise ratio-based port selection (USPS) strategy, and uplink channel-based port selection (UCPS) strategy. A step function approximation (SFA) approach is also relied upon to derive closed-form expressions for the outage probabilities, while the lower bounds for uplink WDT outage probabilities are also formulated. Numerical results demonstrate the validity of our theoretical analysis, which also provide useful guidelines for the system design through the analytical framework.

Problem

• Fluidic Antenna
• Wireless Power Transfer
• Port Selection Impact

Innovation

• Fluidic Antenna
• Wireless Power and Data Transfer
• SFA Method