Optimal Power Splitting for Simultaneous Information Detection and Energy Harvesting

Abstract

This letter deals with the joint information and energy processing at a receiver of a point-to-point communication channel. In particular, the trade-off between the achievable information rate and harvested energy for a multiple-antenna power splitting (PS) receiver is investigated. Here, the rateenergy region characterization is of particular interest, which is intrinsically a non-convex problem. In this letter, an efficient algorithm is proposed for obtaining an approximate solution to the problem in polynomial time. This algorithm is mainly based on the Taylor approximation in conjunction with semidefinite relaxation (SDR) which is solved by interior-point methods. Moreover, we utilize the Gaussian randomization procedure to obtain a feasible solution for the original problem. It is shown that by proper receiver design the rate-energy region can be significantly enlarged compared to the state of the art, while at the same time the receiver hardware costs is reduced by utilizing less number of energy harvesting circuitry.

Heterogeneous Multi-Tier Networks: Improper Signaling for Joint Rate-Energy Optimization

“…where C w k andĈ w k are the variance and pseudo-variance of the interference-plus-noise at the kth cellular user. Notice that, the first terms in (16) and (17) correspond to the achievable rate bound in case of proper signaling, i.e.,Ĉ y k = 0 andĈ z j = 0. Similarly, the achievable rate of the jth full-duplex user is given by…”

“…where C q j andĈ q j are the variance and pseudo-variance of the interference-plus-noise at the jth full-duplex user. Allowing the transmission to be improper Gaussian, we can enhance the bound by improving the second terms in (16) and (17), [18], [19].…”

“…Power splitting (PS) and timesharing (TS) are other alternatives for joint ID and EH purposes [14]. By splitting the received signal power, the energy of one portion is converted to direct current for loading the energy buffer, while the information out of the other portion is decoded [15], [16]. Time-sharing between energy harvesting and information detection phases allows EH and ID in separate time instants, Fig.2.…”

Towards Optimal Energy Harvesting Receiver Design in MIMO Systems

“…In that paper, the authors apply power splitting after constructive combining of the received signals from the antennas in the analog domain. While in [8] a hybrid beamforming structure for simultaneous ID and EH in a single-input multiple-output P2P channel was proposed. In this paper, we study the performance of simultaneous ID and EH in a MIMO communication system.…”

Information Detection and Energy Harvesting Trade-off in Multi-User Secure Communication

“…Utilizing PS receivers, the required energy constraint is fulfilled by appropriate power transmission. This concept is known as simultaneous wireless information and power transmission (SWIPT) [7]- [9].…”