Abstract
Rapid emergence of wireless sensor networks (WSN) faces significant challenges due to limited battery life capacity of composing sensor nodes. It is substantial to construct efficient techniques to prolong the battery life of the connected sensors in order to derive their full potential in the future Internet of Things (IoT) paradigm. For that purpose, different energy harvesting (EH) schemes are relying on a wide array of sources. Following the same objective, in this work, we have observed a time-switching EH for half-duplex (HD) bidirectional WSN, which performed in-between relaying over Hoyt fading channels. For its comprehensive performance analysis, rapidly converging infinite-series expressions have been provided with focus on the outage probability (OP) and achievable throughput of the hardware-impaired system. Additionally, asymptotic behavior of these performance measures has also been provided. Further, an approach to the symbol-error probability (SEP) analysis is also presented in the context of the observed system. Finally, we consider the shadowing influence along the WSN propagation path. Performance analysis of observed EH system operating over Rician-shadowed fading channels has been carried out, with deriving exact corresponding infinite-series expressions for outage probability (OP) and achievable throughput of the system under the hardware impairment conditions. In addition, bidirectional relaying in a mixed fading environment has been considered.
Highlights
The future Internet of Things (IoT) tends to connect large number of forthcoming gadgets, and wireless sensors are expected to have a crucial role in such interconnected networks
Since wireless sensor networks (WSN) are subjected to limited energy storage at each mobile node, reduction of energy consumption has evolved as a mainstream research issue in WSNs
Since Rayleigh model is the widely most used for the transmission when there is no direct line-of-sight (LOS) between the transmitter and the receiver, studying wireless performance measures based on the Hoyt model provides significant generalization of all previous considered scenarios
Summary
The future Internet of Things (IoT) tends to connect large number of forthcoming gadgets, and wireless sensors are expected to have a crucial role in such interconnected networks. Since Rayleigh model is the widely most used for the transmission when there is no direct line-of-sight (LOS) between the transmitter and the receiver, studying wireless performance measures based on the Hoyt model provides significant generalization of all previous considered scenarios. Half-duplex bidirectional WSN with time-switching-based EH relaying protocol over Hoyt fading channels has been observed in [24]. Another contribution of this paper is the consideration of shadowing influence along the WSN propagation path. Converging infinite-series expressions have been derived for the OP and achievable throughput at hardware-impaired destination nodes with information transmission over the mixed Hoyt/Rician-shadowed fading environment.
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