This paper investigates #reconfigurable #intelligent #surface (#RIS)-assisted #simultaneous #wireless #information and #power #transfer (#SWIPT) #Internet #of #Things (#IoT) networks, where energy-limited IoT devices are overlaid with cellular #information #users (#IUs). IoT devices are wirelessly powered by a RIS-assisted #massive #multiple-#input #multiple-#output (#MIMO) #base #station (#BS), which is simultaneously serving a group of IUs. By leveraging a two-timescale transmission scheme, precoding at the BS is developed based on the instantaneous #channel #state #information (#CSI), while the passive beamforming at the RIS is adapted to the slowly-changing statistical CSI. They derive closed-form expressions for the achievable spectral efficiency of the IUs and average harvested energy at the IoT devices, taking the channel estimation errors and pilot contamination into account. Then, a #non-#convex #max-#min #fairness optimization problem is formulated subject to the power budget at the BS and individual quality of service requirements of IUs, where the transmit power levels at the BS and passive RIS reflection coefficients are jointly optimized.----MohammadAli Mohammadi, Ngo Quoc Hien, @Michail Matthaiou
More details can be found at this link:
https://lnkd.in/e4QeFj6z
Phd Researcher in Engineering and Computing Education @ SUCCEED, FIU | CRA-WP Grad Cohort’21 | GHC Scholar’20
8moCongratulations! Proud of you! 👏