Outage probability of dual-hop cooperative communication networks over the Nakagami- m fading channel with RF energy har
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Outage probability of dual-hop cooperative communication networks over the Nakagami-m fading channel with RF energy harvesting Hoang Duc Vinh1 · Tran Manh Hoang2 · Pham Thanh Hiep3 Received: 21 June 2019 / Accepted: 28 October 2020 © Institut Mines-T´el´ecom and Springer Nature Switzerland AG 2020
Abstract Cooperative communication systems with wireless power transfer are being investigated for future advanced wireless networks. In this research, we propose applying a wireless power transfer to dual-hop cooperative communication systems, in which a relay node harvests the energy from the radiofrequency in order to forward the received signal, and a source node can communicate with a destination node directly or through the selected relay nodes. The system performance is evaluated by an outage probability that is calculated over independent and identically distributed (i.i.d) Nakagami-m distributions in two scenarios, i.e., integer m and arbitrary m. Furthermore, the closed forms of the outage probability expressions are derived in the case of both the amplify-and-forward (AF) and decode-and-forward (DF) protocols. The Monte Carlo method is utilized to simulate the system with the aims of evaluating the system performance and verifying the theoretical analysis. The numerical results highlight that the proposed calculation method and the closed form of the outage probability are accurate. We also compare the system performance of both the AF and DF protocols and show the effect of parameter m on the performance of the system. Keywords Dual-hop cooperative communication · Energy harvesting · Arbitrary m parameter · Closed-form of outage probability
1 Introduction Cooperative communication has been recognized as an efficient way to extend the coverage of wireless networks. Two relaying protocols commonly used for cooperative networks are the amplify-and-forward (AF) and decodeand-forward (DF) [1, 2]. In the AF protocol, a relay node amplifies the signals received from the source and then forwards the amplified signals to the destination, whereas in the DF protocol, the signal is detected, decoded, re-encoded, and remodulated before being forwarded to the destination. In case there are multiple available relay nodes, a relay selection protocol, i.e., partial relay selection or full relay Pham Thanh Hiep
[email protected] 1
Viet Nam Post, Ha Noi, Vietnam
2
Telecommunication of University, Nha Trang, Vietnam
2
Le Quy Don Technical University, Ha Noi, Vietnam
selection [3, 4], is applied to select the best relay node based on the channel state information (CSI). On the other hand, radiofrequency (RF) energy transfer and harvest techniques have become alternative methods for supplying power to devices in next-generation wireless networks [5]. These techniques appear to be a promising solution for energy-constrained wireless networks such as wireless sensor networks and biomedical wireless body area networks. The devices in energy-constrained wireless networks have a limited lifetime, which greatly confines
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