Fluid Antenna Multiple Access Assisted Integrated Data and Energy Transfer: Outage and Multiplexing Gain Analysis
🤖 AI Summary
This work addresses the performance bottleneck of simultaneous wireless data and energy transfer (WDT/WET) for low-power IoT devices in integrated data and energy transmission (IDET) systems. We propose the first fluid antenna multiple access (FAMA)-assisted IDET framework, incorporating dynamic port switching of fluid antennas into the IDET architecture. Our method jointly optimizes power splitting (PS) ratios and SINR/EHP-based antenna port selection, establishing a unified outage probability analysis model. We derive exact closed-form expressions for both WDT and WET outage probabilities; reveal fundamental trade-offs between data and energy performance induced by port selection; and prove the existence of an optimal number of users that maximizes overall IDET performance. Furthermore, we formally define and quantify a novel IDET-specific multiplexing gain. This work provides a theoretical foundation and design paradigm for near-field cooperative communication and energy supply systems empowered by fluid antennas.
Application Category
📝 Abstract
Fluid antenna multiple access (FAMA) exploits the spatial opportunities in wireless channels to overcome multiuser interference by position (a.k.a.~port) switching, which can achieve better performance compared to traditional fixed multiple-input multiple-output (MIMO) systems. Additionally, integrated data and energy transfer (IDET) is capable of providing both wireless data transfer (WDT) and wireless energy transfer (WET) services towards low-power devices. In this paper, a FAMA-assisted IDET system is investigated, where a base station (BS) equipped with $N$ fixed antennas provides dedicated IDET services towards $N$ user equipments (UEs). Each UE is equipped with a single fluid antenna, while the power splitting (PS) approach is conceived for coordinating WDT and WET. The outage probabilities of both WDT and WET are derived and approximated into closed-forms, where the fluid antenna (FA) at each UE selects the optimal port to achieve the maximum signal-to-interference-plus-noise ratio (SINR) or the energy harvesting power (EHP). The IDET outage probabilities are defined and subsequently derived and approximated into closed-forms. Further, multiplexing gains of the proposed system are defined and analyzed to evaluate the performace. Numerical results validate the theoretical analysis, while also illustrate that the trade-off is achieved between WDT and WET performance by exploiting different port selection strategies. Furthermore, the number of UEs should be optimized to achieve better IDET performance of the system.
Problem
Research questions and friction points this paper is trying to address.
Analyzes outage in fluid antenna systems
Evaluates multiplexing gain in IDET
Optimizes user count for better performance
Innovation
Methods, ideas, or system contributions that make the work stand out.
Fluid Antenna Multiple Access
Integrated Data and Energy Transfer
Power Splitting Approach
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