1 research outputs found
Joint Time-Frequency Splitting for Multiuser SWIPT OFDM Networks
In this paper, we propose a joint time-frequency splitting (TFS) strategy for
a multiuser orthogonal frequency division multiplexing (OFDM) system with
simultaneous wireless information and power transfer (SWIPT). In TFS, the time
sharing factors for each user on different subcarriers are optimized via
maximizing the sum rate of users with both information and energy quality of
service (QoS) constraints. Though the original problem is nonconvex, we first
transform it into an equivalent convex problem through an appropriate variable
transformation. Then, we present an iterative algorithm based on semi closed
form with low complexity. Numerical results show that the proposed TFS
outperforms the conventional time-sharing and subcarrier-separation strategies