Cell-Free IoT Networks With SWIPT: Performance Analysis and Power Control

In this article, the performance of simultaneous wireless information and power transfer (SWIPT) in downlink (DL) Internet Things (IoT) networks relying on cell-free massive multiple-input–multiple-output (CF-mMIMO) technique is investigated. such a network, access points (APs) beam radio-frequency (RF) energy toward IoT sensors during DL phase. Tight closed-form expressions for harvested (HE) achievable rate with conjugate beamforming (CB) normalized CB (NCB) are, respectively, derived, which enable us to analyze behaviors NCB schemes terms both HE rate. Apart from this, guarantee sensor fairness respect rate, max–min control strategy based accelerated projected gradient (APG) method proposed. Specifically, proposed APG-based able determine optimal solution closed form more memory efficient than convex-solver-based counterpart. These analytical results as well effectiveness policy are verified by experimental simulations.