Cooperative communications with wireless energy harvesting over nakagami-m fading channels

Jia Ye, Hongjiang Lei, Yuanwei Liu, Gaofeng Pan*, Daniel Benevides da Costa, Qiang Ni, Zhiguo Ding

*此作品的通讯作者

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摘要

In this paper, a dual-hop decode-to-forward cooperative system is considered where multiple relays are with finite energy storage and can harvest energy from the destination. In our analysis, the relays are spatially randomly located with invoking stochastic geometry. In an effort to improve spectral efficiency, an optimal source-relay link scheme is employed. Assuming Nakagami-m fading, two different scenarios are considered: 1) the single-antenna source with perfect channel state information (CSI) and 2) the multiple-antenna source with transmit antenna selection and imperfect CSI. In both scenarios, the destination node is equipped with a single transmit antenna to forward power via frequency radio signal to the relay candidates. For improving the system performance, multiple antennas at the destination are considered to process the multiple copies of the received signal from the best relay. For characterizing the performance of the proposed scenarios, exact closed-form analytical expressions for the outage probability are derived. To obtain further insights, we carry out diversity gain analysis by adopting asymptotic relative diversity. We also derive the exact closed-form analytical expression for the system throughput. Finally, simulation results are presented to corroborate the proposed analysis and to show that: 1) the system performance is improved by enlarging the area of the circle and the density of the relays and 2) the energy storage size has impacts on the performance of considered networks, which determines the maximal transmit power at relays.

源语言英语
页(从-至)5149-5164
页数16
期刊IEEE Transactions on Communications
65
12
DOI
出版状态已出版 - 12月 2017
已对外发布

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引用此

Ye, J., Lei, H., Liu, Y., Pan, G., Benevides da Costa, D., Ni, Q., & Ding, Z. (2017). Cooperative communications with wireless energy harvesting over nakagami-m fading channels. IEEE Transactions on Communications, 65(12), 5149-5164. https://doi.org/10.1109/TCOMM.2017.2740928