Multitone FSK Modulation for SWIPT

Claessens, Steven; Pan, Ning; Schreurs, Dominique; Pollin, Sofie

doi:10.1109/tmtt.2019.2908645

Cited by 41 publications

(39 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As illustrated in Fig. 3, the rectifying circuit generally includes an input voltage, a rectifying diode, and a low pass filter used to clear any unwanted noise present in the circuit [36]. The circuit is designed to receive the input signal via the antenna modeled by the input source V in and matched resistor.…”

Section: A Rectifying Circuit Modelmentioning

confidence: 99%

Signal Conditioning for Selective OFDM SWIPT Systems

Buckley

Heath

2021

IEEE Open J. Commun. Soc.

View full text Add to dashboard Cite

The conversion efficiency of a harvesting component can hinder device self-sustainability. Countering this inefficiency can be a rigorous task that requires either a modified input waveform at the harvesting component or an improved design of the harvesting component itself. This paper considers a selective orthogonal frequency division multiplexing (OFDM) system that is designed for simultaneous wireless information and power transfer (SWIPT). This paper introduces an enhanced transmitter architecture designed to condition the transmit signal for improved conversion efficiency. Leveraging the structure of the OFDM signal, the cyclic prefix plus a portion of the information signal are conditioned and used for harvesting. Then, a rectifier model and prototypes are designed to further improve conversion efficiency. System performance is evaluated with the analytical derivation of the rate-energy (R-E) tradeoff and an optimized transmission strategy for system self-sustainability. Monte Carlo simulations show increased energy gains and full self-sustainability with the introduction of signal conditioning.

show abstract

Section: A Rectifying Circuit Modelmentioning

confidence: 99%

Signal Conditioning for Selective OFDM SWIPT Systems

Buckley

Heath

2021

IEEE Open J. Commun. Soc.

View full text Add to dashboard Cite

show abstract

“…In the literature, we encounter several studies that have developed WPT [31], [35]- [41] and SWIPT [42], [43] test beds for varying purposes, from simply charging a battery to studying the effects of the factors influencing system performance. However, this research direction is still fairly in its nascent stage and provides opportunity for original contributions.…”

Section: B Literature Reviewmentioning

confidence: 99%

Waveforms and End-to-End Efficiency in RF Wireless Power Transfer Using Digital Radio Transmitter

Ayir

Riihonen

Allén

et al. 2021

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

We study radio frequency (RF) wireless power transfer (WPT) using a digital radio transmitter for applications where alternative analog transmit circuits are impractical. An important parameter for assessing the viability of an RF WPT system is its end-to-end efficiency. In this regard, we present a prototype test bed comprising a software-defined radio (SDR) transmitter and an energy-harvesting receiver with a low resistive load; employing an SDR makes our research meaningful for simultaneous wireless information and power transfer (SWIPT). We analyze the effect of clipping and nonlinear amplification at the SDR on multisine waveforms. Our experiments suggest that when the direct current (dc) input power at the transmitter is constant, high peak-to-average power ratio (PAPR) multisines are unsuitable for RF WPT over a flat-fading channel, due to their low average radiated power. The results indicate that the end-to-end efficiency is positively correlated with the average RF power of the waveform and that it reduces with increasing PAPR. Consequently, digital modulations, such as phase shift keying (PSK) and quadrature amplitude modulation (QAM), yield better end-to-end efficiency than multisines. Moreover, the end-to-end efficiency of PSK and QAM signals is invariant to the transmission bit rate. An in-depth analysis of the end-toend efficiency of WPT reveals that the transmitter efficiency is lower than the receiver efficiency. Furthermore, we study the impact of a reflecting surface on the end-to-end efficiency of WPT and assess the transmission quality of the information signals by evaluating their error vector magnitude (EVM) for SWIPT. Overall, the experimental observations of end-to-end efficiency and EVM suggest that, while employing an SDR transmitter with fixed dc input power, a baseband quadrature PSK signal is most suitable for SWIPT at large, among PSK and QAM signals.Index Terms-Nonlinear distortion, radio frequency (RF) energy harvesting (EH), simultaneous wireless information and power transfer (SWIPT), software-defined radio (SDR), wireless power transfer (WPT).

show abstract

“…Other existing works about modulation design were studied in amplitude [20], frequency [21] or the tone index of multisine waveforms [22].…”

Section: B Related Workmentioning

confidence: 99%

Unary Coding Design for Simultaneous Wireless Information and Power Transfer With Practical M-QAM

Zhao

Yang

et al. 2021

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

Relying on the propagation of modulated radio-frequency (RF) signals, we can achieve simultaneous wireless information and power transfer (SWIPT) to support low-power communication devices. In this paper, we studied a unary coding controlled SWIPT system by considering a practical M-QAM.Markov chains are exploited for characterising coherent binary information source and for modelling the generation process of modulated symbols. Therefore, both mutual information between the unary coded information source and destination and average energy harvesting performance of the SWIPT receiver are analysed in semi-closed-form. With the aid of the genetic algorithm, the sub-optimal codeword distribution of coded information source is obtained by maximising the average energy harvesting performance, while satisfying the requirement of the mutual information. Simulation results show that a higher-level unary code and a lower-order M-QAM results in higher WPT performance, when the maximum transmit power of the modulated symbol is fixed.

show abstract

Multitone FSK Modulation for SWIPT

Cited by 41 publications

References 27 publications

Signal Conditioning for Selective OFDM SWIPT Systems

Signal Conditioning for Selective OFDM SWIPT Systems

Waveforms and End-to-End Efficiency in RF Wireless Power Transfer Using Digital Radio Transmitter

Unary Coding Design for Simultaneous Wireless Information and Power Transfer With Practical M-QAM

Contact Info

Product

Resources

About