Abstract
The traditional simultaneous wireless information and power transfer (SWIPT) system uses a part of signals to decode information, and the other part is used for harvesting energy, so that the device can be charged while working. However, the problems, such as the independent antenna and the feeble signal power and energy, greatly restrict the area of rate-energy region, thus leading to a big deviation between the theoretical value and the actual value. To solve these problems, a transmission scheme of SWIPT based on time reversal (TR) is proposed. Considering the general multi-input and single-output wireless communication system, on the one hand, the temporal and spatial focus of TR is used to increase the signal strength at the receiving end, on the other hand, the Kronecker model is used to theoretically build the transmission process on the condition of relevant antennas. After that the closed expression of the rate-energy region will be derived. The correctness of the formulary in different conditions is verified through the results of Monte Carlo simulation. The area of the rate-energy region is increased remarkably by comparing with the performance of SWIPT-MISO.
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