KSII Transactions on Internet and Information Systems (TIIS)

  • 제10권1호
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  • Pages.152-167
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  • 2016
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  • 1976-7277(pISSN)
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  • 1976-7277(eISSN)
한국인터넷정보학회 (Korean Society for Internet Information)
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Simultaneous Wireless Information and Power Transfer in Two-hop OFDM Decode-and-Forward Relay Networks

  • Di, Xiaofei (School of Computer and Information Technology, Beijing Jiaotong University) ;
  • Xiong, Ke (School of Computer and Information Technology, Beijing Jiaotong University) ;
  • Zhang, Yu (School of Computer and Communication Engineering, University of Science and Technology) ;
  • Qiu, Zhengding (School of Computer and Information Technology, Beijing Jiaotong University)
  • 투고 : 2015.08.19
  • 심사 : 2015.10.31
  • 발행 : 2016.01.31
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초록

This paper investigates the simultaneous wireless information and power transfer (SWIPT) for two-hop orthogonal frequency division multiplexing (OFDM) decode-and-forward (DF) relay network, where a relay harvests energy from radio frequency signals transmitted by a source and then uses the harvested energy to assist information transmission from the source to its destination. The power splitting receiver is considered at the relay. To explore the performance limit of such a SWIPT-enabled system, a resource allocation (RA) optimization problem is formulated to maximize the achievable information rate of the system, where the power allocation, the subcarrier pairing and the power splitting factor are jointly optimized. As the problem is non-convex and there is no known solution method, we first decompose it into two separate subproblems and then design an efficient RA algorithm. Simulation results demonstrate that our proposed algorithm can achieve the maximum achievable rate of the system and also show that to achieve a better system performance, the relay node should be deployed near the source in the SWIPT-enabled two-hop OFDM DF relay system, which is very different from that in conventional non-SWIPT system where the relay should be deployed at the midpoint of the line between the source and the destination.

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참고문헌

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  3. Wireless Energy Harvesting with Cooperative Relaying under the Best Relay Selection Scheme vol.12, pp.5, 2016, https://doi.org/10.3390/en12050892
  4. Green transmission for C-RAN based on SWIPT in 5G: a review vol.25, pp.5, 2019, https://doi.org/10.1007/s11276-018-1718-z