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arXiv 2104.08404cs.ITmath.IT
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IoT的无线信息和功率传输:脉冲位置调制、集成接收器和实验验证

Wireless Information and Power Transfer for IoT: Pulse Position Modulation, Integrated Receiver, and Experimental Validation

Junghoon Kim, Bruno Clerckx

摘要:

同时无线信息和电力传输(SWIPT)已成为一种可行的技术,可以为低功耗自主设备供电和连接,并实现未来的物联网(IoT)。SWIPT的一个主要挑战是这种低功率设备的接收器的能量消耗。一种有吸引力的低功率解决方案包括用于SWIPT接收器(IntRx)的集成信息解码器(ID)和能量采集器(EH)架构,其中接收到的RF信号在用于信息解码之前首先被整流。这种架构消除了对本地振荡器和混频器等耗能RF组件的需求。本文提出了一种新的调制和解调方法的IntRx SWIPT架构的脉冲位置调制(PPM)的基础上,信息被编码在脉冲的位置。该方法通过发射高幅度脉冲来提高发射信号的峰均功率比(PAPR),并利用EH的非线性特性来提高采集的直流功率。同时,通过简单地找到脉冲在特定符号持续时间中的位置,可以从整流器信号解码信息。我们已经分析了新提出的PPM的IntRx SWIPT的理论,数值和实验的信息和功率传输性能。为此,我们已经建立了一个SWIPT系统测试平台,在室内环境中的原型基站传输信息功率信号和IntRx SWIPT接收器,包括ID和EH块。在各种条件下对PPM进行了性能评估,并与常规信号进行了比较。理论,数值和实验结果突出了显着的好处,提出的PPM方案,以提高功率传输性能和操作信息解码低功耗。

英文摘要:

Simultaneous wireless information and power transfer (SWIPT) has emerged as a viable technique to energize and connect low-power autonomous devices and enable future Internet of Things (IoT). A major challenge of SWIPT is the energy consumption of the receiver of such low-power devices. An attractive low-power solution consists in an integrated information decoder (ID) and energy harvester (EH) architecture for SWIPT receiver (IntRx) where the received RF signal is first rectified before being used for information decoding. Such architecture eliminates the need for energy-consuming RF components such as local oscillators and mixers. This paper proposes a novel modulation and demodulation method for the IntRx SWIPT architecture based on pulse position modulation (PPM) where information is encoded in the position of the pulse. The new method transmits high amplitude pulses to increase the Peak-to-Average Power Ratio (PAPR) of the transmit signal and exploits the EH's nonlinearity so as to boost the harvested DC power. Simultaneously, the information can be decoded from the rectifier signal by simply finding the position of the pulse in a certain symbol duration. We have analyzed both the information and the power transfer performance of the newly proposed PPM for IntRx SWIPT theoretically, numerically, and experimentally. To that end, we have established a SWIPT system testbed in an indoor environment by prototyping a base station to transfer information-power signal and the IntRx SWIPT receiver including ID and EH blocks. The performance evaluation of the PPM was carried out in various conditions, and the results have been compared and contrasted to conventional signals. Theoretical, numerical, and experimental results highlight the significant benefits of the proposed PPM scheme to enhance the power transfer performance and operate information decoding with low-power consumption.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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