Cargando…

Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks

Wireless channel propagation characteristics and models are important to ensure the communication quality of wireless sensor networks in agriculture. Wireless channel attenuation experiments were carried out at different node antenna heights (0.8 m, 1.2 m, 1.6 m, and 2.0 m) in the tillering, jointin...

Descripción completa

Detalles Bibliográficos
Autores principales: Gao, Zhenran, Li, Weijing, Zhu, Yan, Tian, Yongchao, Pang, Fangrong, Cao, Weixing, Ni, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163486/
https://www.ncbi.nlm.nih.gov/pubmed/30223574
http://dx.doi.org/10.3390/s18093116
_version_ 1783359372754157568
author Gao, Zhenran
Li, Weijing
Zhu, Yan
Tian, Yongchao
Pang, Fangrong
Cao, Weixing
Ni, Jun
author_facet Gao, Zhenran
Li, Weijing
Zhu, Yan
Tian, Yongchao
Pang, Fangrong
Cao, Weixing
Ni, Jun
author_sort Gao, Zhenran
collection PubMed
description Wireless channel propagation characteristics and models are important to ensure the communication quality of wireless sensor networks in agriculture. Wireless channel attenuation experiments were carried out at different node antenna heights (0.8 m, 1.2 m, 1.6 m, and 2.0 m) in the tillering, jointing, and grain filling stages of rice fields. We studied the path loss variation trends at different transmission distances and analyzed the differences between estimated values and measured values of path loss in a free space model and a two-ray model. Regression analysis of measured path loss values was used to establish a one-slope log-distance model and propose a modified two-slope log-distance model. The attenuation speed in wireless channel propagation in rice fields intensified with rice developmental stage and the transmission range had monotone increases with changes in antenna height. The relative error (RE) of estimation in the free space model and the two-ray model under four heights ranged from 6.48–15.49% and 2.09–13.51%, respectively, and these two models were inadequate for estimating wireless channel path loss in rice fields. The ranges of estimated RE for the one-slope and modified two-slope log-distance models during the three rice developmental stages were 2.40–2.25% and 1.89–1.31%, respectively. The one-slope and modified two-slope log-distance model had better applicability for modeling of wireless channels in rice fields. The estimated RE values for the modified two-slope log-distance model were all less than 2%, which improved the performance of the one-slope log-distance model. This validates that the modified two-slope log-distance model had better applicability in a rice field environment than the other models. These data provide a basis for modeling of sensor network channels and construction of wireless sensor networks in rice fields. Our results will aid in the design of effective rice field WSNs and increase the transmission quality in rice field sensor networks.
format Online
Article
Text
id pubmed-6163486
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-61634862018-10-10 Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks Gao, Zhenran Li, Weijing Zhu, Yan Tian, Yongchao Pang, Fangrong Cao, Weixing Ni, Jun Sensors (Basel) Article Wireless channel propagation characteristics and models are important to ensure the communication quality of wireless sensor networks in agriculture. Wireless channel attenuation experiments were carried out at different node antenna heights (0.8 m, 1.2 m, 1.6 m, and 2.0 m) in the tillering, jointing, and grain filling stages of rice fields. We studied the path loss variation trends at different transmission distances and analyzed the differences between estimated values and measured values of path loss in a free space model and a two-ray model. Regression analysis of measured path loss values was used to establish a one-slope log-distance model and propose a modified two-slope log-distance model. The attenuation speed in wireless channel propagation in rice fields intensified with rice developmental stage and the transmission range had monotone increases with changes in antenna height. The relative error (RE) of estimation in the free space model and the two-ray model under four heights ranged from 6.48–15.49% and 2.09–13.51%, respectively, and these two models were inadequate for estimating wireless channel path loss in rice fields. The ranges of estimated RE for the one-slope and modified two-slope log-distance models during the three rice developmental stages were 2.40–2.25% and 1.89–1.31%, respectively. The one-slope and modified two-slope log-distance model had better applicability for modeling of wireless channels in rice fields. The estimated RE values for the modified two-slope log-distance model were all less than 2%, which improved the performance of the one-slope log-distance model. This validates that the modified two-slope log-distance model had better applicability in a rice field environment than the other models. These data provide a basis for modeling of sensor network channels and construction of wireless sensor networks in rice fields. Our results will aid in the design of effective rice field WSNs and increase the transmission quality in rice field sensor networks. MDPI 2018-09-15 /pmc/articles/PMC6163486/ /pubmed/30223574 http://dx.doi.org/10.3390/s18093116 Text en © 2018 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gao, Zhenran
Li, Weijing
Zhu, Yan
Tian, Yongchao
Pang, Fangrong
Cao, Weixing
Ni, Jun
Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks
title Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks
title_full Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks
title_fullStr Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks
title_full_unstemmed Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks
title_short Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks
title_sort wireless channel propagation characteristics and modeling research in rice field sensor networks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6163486/
https://www.ncbi.nlm.nih.gov/pubmed/30223574
http://dx.doi.org/10.3390/s18093116
work_keys_str_mv AT gaozhenran wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks
AT liweijing wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks
AT zhuyan wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks
AT tianyongchao wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks
AT pangfangrong wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks
AT caoweixing wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks
AT nijun wirelesschannelpropagationcharacteristicsandmodelingresearchinricefieldsensornetworks