Performance Analysis for SWIPT Cooperative DF Communication Systems with Hybrid Receiver and Non-Linear Energy Harvesting Model

Abstract

In this paper, we study the outage and throughput performance for the simultaneous wireless information and power transfer (SWIPT) cooperative decode-and-forward (DF) communication systems. The hybrid receiver that uses both time switching (TS) and power splitting (PS) methods for energy harvesting (EH) and information decoding (ID), and the piece-wise linear EH model that captures the non-linear input-output characteristic of the EH circuit, are considered. We present exact analytical expressions of the outage probability (OP) and throughput, which are expressed as single definite integral on finite interval and can be easily evaluated, for the systems in Rayleigh fading channel. For further simplicity of calculation, we derive novel and closed-form approximate expressions of the OP and throughput. The impact of different system parameters on the system performance is investigated. Numerical results show the high accuracy of the proposed closed-form approximate expressions especially in the region of higher signal-to-noise ratio (SNR). It is also shown that the system performance is greatly overestimated when the ideal linear EH model is used instead of the practical non-linear EH model. A different result to the non-hybrid receiver with both linear EH model and non-linear EH model that there exists an optimal location to minimize the OP for the hybrid receiving relay node with non-linear EH model is also demonstrated.

Optimal Relay Selection Scheme with Multiantenna Power Beacon for Wireless-Powered Cooperation Communication Networks

“…Depending on a practical model of distance and path loss such as used in (e.g., [ 10 , 11 , 25 ]), we consider that are location-based clustering model and placed between S and D in one straightness, so the distance between S and is given as . Without loss of generality, the system model parameters are defined in Table 1 unless otherwise stated.…”

“…We follow location-based clustering model where the relays set are grouped relatively near each other. In the area of relay selection schemes this proposition is widely used (e.g., [ 10 , 11 , 25 ]) which means equal average channel power gains of B-R, S-R, and R-D links.…”

“…Present research interested in enabling the WPC in massive MIMO system focuses primarily on beamforming schemes design, where a portion of time slot was reserved for energy transfer and information transmission [ 6 , 7 , 8 , 9 ]. Moreover, in cooperative communication and relay selection, the distances between transmitter and receiver will significantly reduce, which made wireless power cooperative communication networks (WPCCN) an important technology that can efficiently combat signal propagation losses for information transmission and wireless energy [ 10 , 11 , 12 ]. Therefore, by virtue of the aforementioned emerging technologies, RF energy harvesting efficiency can be significantly increased, and signal degradation will be less severe.…”

Simultaneous Wireless Information and Power Transfer With Cooperative Relaying for Next-Generation Wireless Networks: A Review

“…Since QoS in SWIPT with CoR is directly affected by time and power fraction, authors in [102] worked on finding optimized values of TS parameter (α) and PS ratio (ρ) to maximize the capacity using Lagrange multipliers. SWIPT with cooperative DF systems and non-linear EH model with hybrid relaying protocol was studied in [103]. OP and throughput performance were studied and it was shown that optimal values of ρ and α as well as determining optimal positioning of relay minimizes OP of systems.…”

Energy Efficiency in RF Energy Harvesting-Powered Distributed Antenna Systems for the Internet of Things

“…Recently, with the rapid growth of the number of users and data traffic of wireless networks, greater coverage and higher information capacity are required to better meet users’ demands. At the same time, many energy-limited wireless devices including Internet of Things (IoT) [ 1 , 2 , 3 ] devices are expected to be deployed with limited battery capacity, which require being charged frequently.…”