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Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation

Multicarrier backscattering has been proposed to improve the communication rate, but the complex circuit structure of multicarrier backscattering devices requires more power consumption, resulting in devices far away from the radio frequency (RF) source without enough power to maintain communication...

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Detalles Bibliográficos
Autores principales: Li, Shibao, Lu, Rui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10145163/
https://www.ncbi.nlm.nih.gov/pubmed/37112179
http://dx.doi.org/10.3390/s23083841
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author Li, Shibao
Lu, Rui
author_facet Li, Shibao
Lu, Rui
author_sort Li, Shibao
collection PubMed
description Multicarrier backscattering has been proposed to improve the communication rate, but the complex circuit structure of multicarrier backscattering devices requires more power consumption, resulting in devices far away from the radio frequency (RF) source without enough power to maintain communication, which greatly reduces the limited communication range in backscattering. To solve this problem, this paper introduces carrier index modulation (IM) into orthogonal frequency division multiplexing (OFDM) backscattering and proposes a dynamic subcarrier activated OFDM-IM uplink communication scheme suitable for passive backscattering devices. When the existing power collection level of the backscatter device is detected, only a subset of carrier modulation is activated using part of the circuit modules to reduce the power threshold required for device activation. The activated subcarriers are mapped by a block-wise combined index using the look-up table method, which can not only transmit information using traditional constellation modulation but also carry additional information through the frequency domain carrier index. Monte Carlo experiments show that this scheme can effectively increase the communication distance and improve the spectral efficiency of low-order modulation backscattering when the power of the transmitting source is limited.
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spelling pubmed-101451632023-04-29 Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation Li, Shibao Lu, Rui Sensors (Basel) Article Multicarrier backscattering has been proposed to improve the communication rate, but the complex circuit structure of multicarrier backscattering devices requires more power consumption, resulting in devices far away from the radio frequency (RF) source without enough power to maintain communication, which greatly reduces the limited communication range in backscattering. To solve this problem, this paper introduces carrier index modulation (IM) into orthogonal frequency division multiplexing (OFDM) backscattering and proposes a dynamic subcarrier activated OFDM-IM uplink communication scheme suitable for passive backscattering devices. When the existing power collection level of the backscatter device is detected, only a subset of carrier modulation is activated using part of the circuit modules to reduce the power threshold required for device activation. The activated subcarriers are mapped by a block-wise combined index using the look-up table method, which can not only transmit information using traditional constellation modulation but also carry additional information through the frequency domain carrier index. Monte Carlo experiments show that this scheme can effectively increase the communication distance and improve the spectral efficiency of low-order modulation backscattering when the power of the transmitting source is limited. MDPI 2023-04-09 /pmc/articles/PMC10145163/ /pubmed/37112179 http://dx.doi.org/10.3390/s23083841 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Shibao
Lu, Rui
Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation
title Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation
title_full Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation
title_fullStr Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation
title_full_unstemmed Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation
title_short Passive Backscatter Communication Scheme for OFDM-IM with Dynamic Carrier Activation
title_sort passive backscatter communication scheme for ofdm-im with dynamic carrier activation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10145163/
https://www.ncbi.nlm.nih.gov/pubmed/37112179
http://dx.doi.org/10.3390/s23083841
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