In this paper, we investigate the relay selection (RS) problem in power splitting (PS) based energy- harvesting (EH) half-duplex (HD) relay networks, where the relays are wirelessly powered by harvesting a portion of the received RF signal power. We expand the relay selection problem in PSEH-HD relay networks to allow multiple relays to cooperate simultaneously. Furthermore, the optimal PS factor is obtained in closed form to facilitate the RS. Simulations show that neither the single RS nor the all-participate RS is optimal across all SNR levels. To improve the capacity of the network by better exploiting the cooperative diversity, a heuristic RS strategy with quadratic complexity is then proposed. The performance of our proposed updated relay ordering based relay selection (URO-RS) strategy is evaluated by simulations, which achieves near-optimum performance in comparison with the exhaustive search based RS strategy but with significantly reduced complexity.
|Original language||English (US)|
|Title of host publication||2017 IEEE 85th Vehicular Technology Conference, VTC Spring 2017 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Nov 14 2017|
|Event||85th IEEE Vehicular Technology Conference, VTC Spring 2017 - Sydney, Australia|
Duration: Jun 4 2017 → Jun 7 2017
|Name||IEEE Vehicular Technology Conference|
|Conference||85th IEEE Vehicular Technology Conference, VTC Spring 2017|
|Period||6/4/17 → 6/7/17|
Bibliographical noteFunding Information:
This work was jointly supported by the National Natural Science Foundation of China (Grant No. 61622101 and 61571020), the Ministry National Key Research and Development Project under Grant 2016YFE0123100, the National 973 project (Grant No. 2013CB336700), and the National Science Foundation under grant number CNS-1343189.
- Energy harvesting
- Power splitting
- Relay selection