Power Peak Position Modulation for SWIPT Networks with OFDM-based Waveforms

In this paper, we propose a novel simultaneous wireless information and power transfer (SWIPT) technique that employs orthogonal frequency-division multiplexing (OFDM)-based waveforms. By using deterministic symbols at the subcarriers with appropriate phase rotation, the proposed scheme embeds information into the position of the power peak of the OFDM-based waveform and is suitable for low-complexity SWIPT integrated receivers. Low-complexity decision rules are also investigated to extract information at the output of the rectification circuit. We study the performance of the proposed scheme in terms of average harvested power and symbol error probability for various modulation orders. The proposed technique transforms conventional OFDM transmitters to SWIPT devices without costly architectural modifications and is promising for practical applications.