Beamforming and Resource Allocation for a Multi-Pair Wireless Powered Two-Way Relay Network With Fairness

Cited 2 time in webofscience Cited 0 time in scopus
  • Hit : 124
  • Download : 0
We consider a wireless powered two-way relay network in which a multi-antenna relay transfers power to devices and assists multi-pair data exchanges based on decode-and-forward with network coding in three phases. The relay in the network adopts energy beamforming (BF) for wireless power transfer, zero-forcing receive BF for multiple access decoding, and two-step transmit BF for efficient transmission of the network coded symbols by eliminating inter-pair interference. In this setup, we optimize energy the BF and transmit BF as well as the time allocation in order to maximize the rate fairness among the devices. The optimal energy BF is derived in closed-form for the network with two devices and is found by searching through the span of channel matched filters with more than two devices, while the optimal two-step transmit BF is given in closed-form for an arbitrary number of devices. In addition, the time allocation problem is shown to be convex and thus easily solved with the existing convex optimization solvers. The simulation results show that the proposed network outperforms conventional networks significantly due to the enhanced BF and flexible time allocation methods.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2019-01
Language
English
Article Type
Article
Citation

IEEE ACCESS, v.7, pp.2799 - 2810

ISSN
2169-3536
DOI
10.1109/ACCESS.2018.2886248
URI
http://hdl.handle.net/10203/250171
Appears in Collection
EE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 2 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0