期刊
IEEE INTERNET OF THINGS JOURNAL
卷 6, 期 2, 页码 3110-3120出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JIOT.2018.2878860
关键词
Cellular Internet of Things (IoT); imperfect successive interference cancellation (SIC); massive access; nonlinear energy harvesting (EH) model; simultaneously wireless information and power transfer (SWIPT)
资金
- Natural Science Foundation of China [61871344]
- National Science and Technology Major Project of China [2018ZX03001017-002]
- Open Research Fund of National Mobile Communications Research Laboratory, Southeast University [2018D07]
In this paper, we investigate the issue of simultaneous wireless information and power transfer in the cellular Internet of Things (IoT) with a massive number of different access devices, e.g., information decoding devices, energy harvesting (EH) devices, and hybrid devices. Especially, we consider a practical scenario of the cellular IoT, where the IoT devices have a nonlinear EH receiver and perform imperfect successive interference cancellation (SIC) due to a limited capability. The benefits offered by a multiple-antenna base station are exploited to enhance the efficiency of both information transmission and power transfer. In particular, we propose to jointly optimize the spatial beam, transmit power, and power splitting ratio to alleviate the impacts of both nonlinear EH and imperfect SIC. To this end, two effective algorithms are designed from the perspectives of maximizing the weighted sum rate and minimizing the total power consumption, respectively. Finally, extensive simulation results are presented to validate the effectiveness of the proposed algorithms.
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