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

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