期刊
IEEE ACCESS
卷 4, 期 -, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2016.2617893
关键词
Channel state information; energy harvesting; multiple-input multiple-output; non-linear; outage probability; wireless-powered relaying
资金
- National Science Foundation [61401372, 61531016]
- Research Fund for the Doctoral Program of Higher Education of China [20130182120017]
- Natural Science Foundation of CQ CSTC [cstc2013jcyjA40040]
- Fundamental Research Funds for the Central Universities [XDJK2015B023, XDJK2016A011]
In this paper, we investigate a wireless-powered dual-hop relaying multiple-input multiple-output system, which consists of a multi-antenna source (S) node, a multi-antenna destination (D) node, and N(N > 1) single-antenna wireless-powered relaying nodes. At each relay, a power splitting receiver is applied to process the received signal for information decoding and energy harvesting simultaneously, and a decode-and-forward scheme is adopted to forward the processed information. Furthermore, the energy harvester at each relay is assumed to be non-linear with a saturation threshold to limit the power level of the energy. Assuming imperfect channel state information is available both at S and D, outage performance is investigated when S adopts transmit antenna selection in the presence of feedback delay and D performs maximal ratio combining technique to deal with the multiple copies of signals with channel estimation errors. Taking into account a Kth best relay selection criterion, which results in the Kth best performance in terms of outage probability for the source-relay-destination link, an analytical expression for OP is derived. Monte Carlo simulation results are presented to verify the accuracy of the derived analytical model.
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