Optimal Transmission Schemes for DF Relaying Networks Using SWIPT

This paper considers a simultaneous wireless information and power transfer (SWIPT) based decode-and-forward relaying network, where the "harvest-then-forward" strategy is employed. We focus on designing optimal static and dynamic transmission schemes of joint time allocation and power spl...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2018-08, Vol.67 (8), p.7062-7072
Main Authors: Yinghui Ye, Yongzhao Li, Dan Wang, Fuhui Zhou, Hu, Rose Qingyang, Hailin Zhang
Format: Article
Language:English
Subjects:
Channel capacity
Convexity
decode-and-forward
Energy harvesting
ergodic performance
Ergodic processes
joint time allocation and power splitting
Mathematical analysis
Optimization
outage performance
Power system reliability
Power transfer
Probability
Relaying
Relays
Resource management
Simultaneous wireless information and power transfer
Splitting
Throughput
Wireless communication
Wireless networks
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Summary:This paper considers a simultaneous wireless information and power transfer (SWIPT) based decode-and-forward relaying network, where the "harvest-then-forward" strategy is employed. We focus on designing optimal static and dynamic transmission schemes of joint time allocation and power splitting to conduct the relay in terms of outage performance and ergodic performance, respectively. In particular, the analytical expressions for the outage probability and ergodic capacity are derived to determine the optimal static power splitting (PS) and time allocation (TA) ratios. Moreover, we study the dynamic transmission scheme and formulate two joint optimization problems to minimize the outage probability and maximize the instantaneous channel capacity. Considering that the two optimization problems are nonconvex, a split-step iterative method is proposed to obtain the optimal dynamic PS ratio and TA ratio for minimizing the outage probability, and an alternate convex optimization method is employed to solve the problem of maximizing the instantaneous channel capacity. Simulation results verify the advantages of the proposed schemes over three peer schemes.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2018.2826598