In this article, we propose a novel simultaneous wireless information and power transfer (SWIPT) scheme for the Internet of Things (IoT). Different from the conventional power splitting (PS) and time switching (TS) schemes, the proposed scheme sends the wireless power via the unmodulated high-power continuous wave (CW) and transmits information by using a small modulated signal in order to reduce the interference and to enhance the power amplifier efficiency. We design a receiver circuit for processing such SWIPT signals, which is designed with the aim of minimizing the circuit complexity and power consumption for information decoding. This goal is achieved by first rectifying the received signal and then splitting the power and information signals. We analyze the proposed receiver circuit and derive the closed-form expression for the energy harvesting efficiency and the frequency response of the communication signal. We have implemented the proposed receiver circuit and built the real-time testbed for experimenting with simultaneous transmission of information and power. By experiments, we have verified the correctness of the receiver circuit analysis and shown the validity of the proposed SWIPT scheme.

中文翻译：

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物联网的同时无线信息和功率传输（SWIPT）：新型接收器设计和实验验证

在本文中，我们为物联网（IoT）提出了一种新颖的同时无线信息和功率传输（SWIPT）方案。与传统的功率分配（PS）和时间切换（TS）方案不同，该方案通过未调制的高功率连续波（CW）发送无线电力，并通过使用较小的调制信号来传输信息，以减少干扰并提高功率放大器的效率。我们设计了一种用于处理此类SWIPT信号的接收器电路，其目的是最大程度地减少信息解码的电路复杂度和功耗。通过首先对接收到的信号进行整流，然后对功率和信息信号进行分离，可以实现该目标。我们分析了所提出的接收器电路，并导出了能量收集效率和通信信号的频率响应的闭式表达式。我们已经实现了拟议的接收器电路，并建立了实时测试台，以进行信息和功率的同时传输实验。通过实验，我们验证了接收器电路分析的正确性，并证明了所提出的SWIPT方案的有效性。