In wireless-powered cooperative communication networks with multiple energy harvesting relays, relay selection has been the solution to exploit the cooperative diversity in the literature. In this paper, we propose to employ network beamforming (NB) in such networks to improve the source-to-destination capacity and reliability. More specifically, we propose a NB scheme with jointly optimized power splitting (PS) factors. To obtain the global optimum efficiently, semidefinite relaxation is used to convert the optimization problem to a quasi-convex one. To further reduce the communication overhead, we also propose a sub-optimal NB scheme with distributed PS factor optimization that requires only local channel state information. The performance gains of our proposed schemes compared with relay selection are demonstrated by simulations.
|Original language||English (US)|
|Title of host publication||2019 IEEE/CIC International Conference on Communications in China, ICCC 2019|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||5|
|State||Published - Aug 2019|
|Event||2019 IEEE/CIC International Conference on Communications in China, ICCC 2019 - Changchun, China|
Duration: Aug 11 2019 → Aug 13 2019
|Name||2019 IEEE/CIC International Conference on Communications in China, ICCC 2019|
|Conference||2019 IEEE/CIC International Conference on Communications in China, ICCC 2019|
|Period||8/11/19 → 8/13/19|
Bibliographical noteFunding Information:
This work was supported in part by the National Key Research and Development Project under Grant 2017YFE0121400 and Grant 2017YFE0119300, the Major Project from Beijing Municipal Science and Technology Commission under Grant Z181100003218007, the National Science and Technology Major Project under Grant No. 2018ZX03001031, and the National Natural Science Foundation of China under Grants 61622101 and 61571020.
© 2019 IEEE.
- Energy harvesting relay
- Network beamforming
- Power splitting