This paper considers a three-step two-way network utilizing an energy harvesting (EH) multiplicative amplify-and-forward (AF) relay. Based on the instantaneous channel state information (CSI), we study a dynamic power splitting (DPS) scheme on how the relay adjusts the power splitting (PS) ratio, achieving a real-time trade-off between the harvested energy and the power of the retransmitted signal. Taking into account a guarantee that both terminals decode the information at the same time, we aim to optimize the worse end-to-end signal-to-noise ratio (SNR) of the two links. As this optimization problem is non-convex and difficult to be solved, an equivalent problem is formulated and an efficient Dinkelbach-based iterative algorithm is proposed to obtain the optimal PS ratio. Simulation results show that the proposed DPS scheme outperforms the exsiting static PS scheme and highlight the effectiveness of the proposed iterative algorithm.
Dynamic Power Splitting for Three-Step Two-Way Multiplicative AF Relay Networks
2017-09-01
376505 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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