Wireless Information and Power Transfer in Single-User OFDM System

Abstract

In this paper, we are analyzing the efficient design for the (SWIPT) Simultaneous Wireless Information and Power Transfer in Single-User OFDM System. An intense research interest has been focused for finding new algorithms of resource allocation for the purpose of efficient utilization of limited transmitted power and frequency resource in Single-User orthogonal frequency division multiplexing systems. Orthogonal Frequency Division Multiplexing (OFDM) provides a promising technique for the nextgen wireless communication systems, where the user harvest energy and decode information that has been received from the same access point. In order for the information transfer to take place, Time Division Multiple Access (TDMA) and Orthogonal Frequency Division Multiple Access (OFDMA) schemes are implemented. Rules and algorithm for resource allocation in Single-User OFDM are found in this paper. We propose the algorithm for resource allocation in order to utilize channel bandwidth and also to reach the maximum channel capacity. Due to the limitations that circuits the energy harvesting from radio signals are not yet able to decode the information carried directly, user applies either time switching or power splitting at the receiver end in order to coordinate between information decoding and energy harvesting processes. In the given two processes, we underwent maximizing the weighted sum-rate over the user by varying the frequency or time power allocation and either time switching or power splitting ratio and is made subject to a minimum harvested energy constraint on each user as well as a peak and total transmission power constraint.
Keywords: OFDM, TDMA, Orthogonal Frequency, wireless, power transfer