Selective OFDM Transmission for Simultaneous Wireless Information and Power Transfer

Buckley, Raquel F.; Heath, Robert W.

doi:10.1109/globecom38437.2019.9013415

Cited by 3 publications

(11 citation statements)

References 14 publications

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“…Notice that because the excitation signal is only added to the CP and portion of the information signal used for harvesting, the remaining portion of the signal used for processing is not affected. Consequently, there is no impact on the rate achieved by the selective system and the rate observed remains similar to what has been obtained by our prior work [10]. Accordingly, the R-E tradeoff for the selective OFDM receiver with SWIPT transmission is expressed as [34] T S…”

Section: B Rate-energy Tradeoffsupporting

confidence: 79%

“…In this paper, we summarize the model for the selective transmitter and co-receiver system designed for OFDM SWIPT transmission [10]. The OFDM system consists of a single antenna transmitter and single antenna co-receiver participating in point-to-point downlink communication.…”

Section: System Modelmentioning

confidence: 99%

“…The coreceiver architecture includes a dynamic switch used for joint energy harvesting and information decoding. The notation throughout this section is kept in agreement with our previous work in [10], [24] for consistency.…”

Section: System Modelmentioning

confidence: 99%

“…with thermal noise n = [n 1 , ..., n N +LCP ] T encountered at the antenna. The selective OFDM system from our work in [10] is first considered here and as such, the co-receiver architecture requires the received signal to first be processed by the radio frequency (RF) to baseband front-end, with downconversion and synchronization for a baseband equivalent input at either the energy harvesting or information decoding receiver. A dynamic switch is used to time-switch between the energy harvesting receiver and information decoding receiver.…”

Section: System Modelmentioning

confidence: 99%

“…In [9], the methodology was extended to include cognitive interference alignment (CIA), an approach requiring precise synchronization between the OFDM and CIA signals. To avoid this strict requirement, our previous work in [10], extended this approach by introducing a new selective receiver architecture that enhanced the receiver's battery lifetime through the notion of CP plus data harvesting for increased energy storage. The selective architecture not only leveraged the CP from the OFDM signal, but further harvested at least a portion of the data signal for increased system self-sustainability.…”

Section: Introductionmentioning

confidence: 99%

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Signal Conditioning for Selective OFDM SWIPT Systems

Buckley

Heath

2021

IEEE Open J. Commun. Soc.

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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.

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Section: B Rate-energy Tradeoffsupporting

confidence: 79%

Section: System Modelmentioning

confidence: 99%

Section: System Modelmentioning

confidence: 99%

Section: System Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Signal Conditioning for Selective OFDM SWIPT Systems

Buckley

Heath

2021

IEEE Open J. Commun. Soc.

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Spectrum Sensing in OFDM using Energy Detection: A Comparative Study in AWGN and Rayleigh Channels

Bhaskar

Anuraj

Poorna

et al. 2020

2020 International Conference on Electronics and Sustainable Communication Systems (ICESC)

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Superposition of rectangular power pulses and CP-OFDM signal for SWIPT

Kassab¹,

Rottenberg²,

Feuillen³

et al. 2022

J Wireless Com Network

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Simultaneous wireless information and power transfer (SWIPT) has recently attracted researchers and may help to satisfy future technology demands. SWIPT allows wireless power transfer (WPT) and wireless information transfer (WIT) to coexist based on shared resources. Recent studies have shown that, due to the nonlinearity of the rectifiers, high-PAPR (peak to average power ratio) waveforms provide better performance in terms of energy harvesting, making the design of power signals essential. In addition, these power signals should consume the smallest amount of resources for the WIT. In this paper, a new waveform design is proposed where the information and power signals are superposed using the same frequency and time resources. The power signal is composed of a high peak modulated rectangular wave sent during the cyclic prefix of the orthogonal frequency-division multiplexing (CP-OFDM) system, which is discarded at the information receiver, such that it does not interfere with the OFDM data symbol. Although the pulse is restricted to be within the cyclic prefix, there might be a small amount of interference caused by channel dispersion. Simulations and measurements show that a good choice of signal parameters can minimize interference on the information symbols and simultaneously provide good performance in terms of energy harvesting.

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Selective OFDM Transmission for Simultaneous Wireless Information and Power Transfer

Cited by 3 publications

References 14 publications

Signal Conditioning for Selective OFDM SWIPT Systems

Signal Conditioning for Selective OFDM SWIPT Systems

Spectrum Sensing in OFDM using Energy Detection: A Comparative Study in AWGN and Rayleigh Channels

Superposition of rectangular power pulses and CP-OFDM signal for SWIPT

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