Enabling Non-Linear Energy Harvesting in Power Domain Based Multiple Access in Relaying Networks: Outage and Ergodic Capacity Performance Analysis

Abstract

The Power Domain-based Multiple Access (PDMA) scheme is considered as one kind of Non-Orthogonal Multiple Access (NOMA) in green communications and can support energy-limited devices by employing wireless power transfer. Such a technique is known as a lifetime-expanding solution for operations in future access policy, especially in the deployment of power-constrained relays for a three-node dual-hop system. In particular, PDMA and energy harvesting are considered as two communication concepts, which are jointly investigated in this paper. However, the dual-hop relaying network system is a popular model assuming an ideal linear energy harvesting circuit, as in recent works, while the practical system situation motivates us to concentrate on another protocol, namely non-linear energy harvesting. As important results, a closed-form formula of outage probability and ergodic capacity is studied under a practical non-linear energy harvesting model. To explore the optimal system performance in terms of outage probability and ergodic capacity, several main parameters including the energy harvesting coefficients, position allocation of each node, power allocation factors, and transmit signal-to-noise ratio (SNR) are jointly considered. To provide insights into the performance, the approximate expressions for the ergodic capacity are given. By matching analytical and Monte Carlo simulations, the correctness of this framework can be examined. With the observation of the simulation results, the figures also show that the performance of energy harvesting-aware PDMA systems under the proposed model can satisfy the requirements in real PDMA applications.

Robust Beamforming Design for SWIPT-Based Multi-Radio Wireless Mesh Network with Cooperative Jamming

“…Unless other stated, we set θ = −5 dBm, γ = 5 dBm, γ e = 2 dBm, η = 0.05, τ = 0.1, N = 4. For the practical nonlinear EH model, we set the circuit parameters as M n = 24 mW, Ω n = 150, and Ψ n = 0.014 [41][42][43][44].…”

“…Although a large number of transmit antennas could improve the capacity, security rate, and bring other benefits to the system, they led a higher total power consumption. [41][42][43][44].…”

“…The non-linear parametric EH model was adopted here since it is more practical than the linear one [41][42][43][44]. After energy harvesting, the power harvested at each WMN node n ∈ {a, b, c} was modeled as…”

Recent Technical Developments in Energy-Efficient 5G Mobile Cells: Present and Future

“…Within this work, a multipoints cooperative relay (MPCR) NOMA model, instead of just a relay, as suggested in previous studies, was proposed. The third paper [18] introduces the Power Domain-based Multiple Access (PDMA) scheme as a kind of NOMA that can be used in green communications and which can support energy-limited devices by employing wireless power transfer. Such a technique is known as a lifetime-expanding solution for operations in future access policy, especially in the deployment of power-constrained relays for three-node, dual-hop systems.…”

Transmit Antenna Selection Schemes for NOMA with Randomly Moving Interferers in Interference-Limited Environment

“…Therefore, NOMA exhibits different performance indicators depending on distances between users and the BS. Furthermore, multiple users are multiplexed simultaneously to use the same radio resources by exploiting the power domain [1][2][3][4][5]. One of the advantages from the implement of NOMA from current orthogonal multiple access (OMA) techniques is that massive users are served at the same time.…”