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학술지 Simultaneous Information and Power Transfer Using Magnetic Resonance
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이기송, 조동호
ETRI Journal, v.36 no.5, pp.808-818
한국전자통신연구원 (ETRI)
14ZC1200, 대용량 태그 고속인식 및 신뢰성 향상을 위한 수동형 RFID 기술 개발, 박찬원
To deal with the major challenges of embedded sensor networks, we consider the use of magnetic fields as a means of reliably transferring both information and power to embedded sensors. We focus on a power allocation strategy for an orthogonal frequency-division multiplexing system to maximize the transferred power under the required information capacity and total available power constraints. First, we consider the case of a co-receiver, where information and power can be extracted from the same signal. In this case, we find an optimal power allocation (OPA) and provide the upper bound of achievable transferred power and capacity pairs. However, the exact calculation of the OPA is computationally complex. Thus, we propose a low-complexity power reallocation algorithm. For practical consideration, we consider the case of a separated receiver (where information and power are transferred separately through different resources) and propose two heuristic power allocation algorithms. Through simulations using the Agilent Advanced Design System and Ansoft High Frequency Structure Simulator, we validate the magneticinductive channel characteristic. In addition, we show the performances of the proposed algorithms by providing achievable η-C regions.
KSP 제안 키워드
Advanced Design System, Channel Characteristics, Embedded sensor, High Frequency(HF), High frequency structure simulator(HFSS), Information capacity, Magnetic field(MF), Magnetic resonance(MR), Optimal power allocation, Orthogonal frequency division Multiplexing(OFDM), Power Constraint