Study of Propagation Loss Prediction in Forest Environment

Meng, Yu Song; Lee, Yee Hui; Ng, Boon Chong

doi:10.2528/pierb09071901

Cited by 77 publications

(49 citation statements)

References 51 publications

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“…For the radio-wave propagation through the foliage medium, there is an additional (excess) loss on the propagating components such as direct wave and reflected waves. Much effort has been put in the empirical modeling of the foliage-induced excess loss at different frequencies and geometries [11][12][13], and has been summarized in [14]. The well-known empirical models are listed below.…”

Section: Ray Tracing and Problem Formulationmentioning

confidence: 99%

Path Loss Modeling for Near-Ground VHF Radio-Wave Propagation Through Forests With Tree-Canopy Reflection Effect

Meng¹,

Lee²,

Ng³

2010

PIER M

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Abstract-This paper presents a new methodology to model the nearground short-range propagation loss in forested areas at the VHF and the UHF band. The path loss modeling is performed by an integration of the foliage induced effect and the effect from the radiowave reflection/reflections. The analysis shows that the reflection from the dense tree canopy is important for short-range propagation at the VHF band and therefore, cannot be ignored. When taking into consideration the contribution from the possible tree-canopy reflection, the modeled path loss is reduced by more than 15 dB in the VHF band. A good agreement of the modeled path loss with the measured loss in tropical forested areas is achieved.

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Section: Ray Tracing and Problem Formulationmentioning

confidence: 99%

Path Loss Modeling for Near-Ground VHF Radio-Wave Propagation Through Forests With Tree-Canopy Reflection Effect

Meng¹,

Lee²,

Ng³

2010

PIER M

Self Cite

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“…Characterization of radio waves propagating through foliage is a challenging task due to the complexity and random characteristics of the channel. Establishing propagation loss prediction models plays a significant role in the research of this field [2].…”

Section: Complexity Of a Forested Environment Channelmentioning

confidence: 99%

Model Development For Wireless Propagation In Forested Environments

Zegarra¹

2015

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington ABSTRACT (maximum 200 words)Wireless propagation modeling is a necessary task in the design of countless applications. Wireless signals attenuate at different rates according to the propagation environment. Given that vegetation is an unavoidable feature for most outdoor wireless channels, propagation models in forested environments are in high demand. The characterization of radio waves propagating through foliage is particularly complex due to the random characteristics of the channel.This research is focused on the development of three radiowave propagation models in forested environments. Field tests were performed at 2.4 GHz for the case where both the transmitting and receiving antennas are immersed in foliage. The propagation loss added by the forest component was estimated from the sets of measurement data, and an empirical model was created to forecast it. Also, electromagnetic properties of the medium were estimated and used in the investigation of a two-layered homogeneous model (ground and foliage). A dielectric slab representing the forest was modeled using an electromagnetic field simulation application.Results from the empirical and analytical model show good agreement with the measured data. These findings bear direct relevance on radiowave propagation through foliage and provide useful information for accurate design of the link budget for similar scenarios. SUBJECT TERMS MODEL DEVELOPMENT FOR WIRELESS PROPAGATION IN FORESTED ENVIRONMENTSJesus Zegarra Lieutenant Junior Grade, Peruvian Navy B. S., Peruvian Naval Academy, 2010Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ELECTRICAL ENGINEERINGfrom the NAVAL POSTGRADUATE SCHOOL September 2015Approved ABSTRACTWireless propagation modeling is a necessary task in the design of countless applications.Wireless signals attenuate at different rates according to the propagation environment.Given that vegetation is an unavoidable feature for most outdoor wireless channels, propagation models in forested environments are in high demand. The characterization of radio waves propagating through foliage is particularly complex due to the random characteristics of the channel.This research is focused on the development of three radiowave propagation models in forested environments. Field tests were performed at 2.4 GHz for the case where both the transmitting and receiving antennas are immersed in foliage. The propagation loss added by the forest component was estimated from the sets of measurement data, and an empirical model was created to forecast it. Also, electromagnet...

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“…The forest-induced effects on the radio-wave propagation have been studied in our previous work [4] due to the implementations of wireless sensor networks in forests recently, where the path loss prediction models are mainly discussed for long-range forested propagations in the VHF and the low UHF bands. However, the effects from a single tree and a line/multiple line of trees have not been thoroughly investigated, although some impressive studies have been conducted by several groups of researchers [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…The appearance of the foliage medium in the path of the communication link has found to play a significant role on the quality of service (QoS) for wireless communications over many years [1][2][3][4]. Discrete scatterers such as the randomly distributed leaves, twigs, branches and tree trunks can cause attenuation, scattering, diffraction, and absorption of the radiated waves.…”

Section: Introductionmentioning

confidence: 99%

Investigations of Foliage Effect on Modern Wireless Communication Systems: A Review

Meng¹,

Lee²

2010

PIER

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Abstract-In this paper, a large number of studies of the effect of the foliage on single or lines of trees on modern wireless communication systems are reviewed. The paper is focused on the experimental works mainly done for commercial applications such as cellular communication and high speed point-to-point fixed link at the microwave and millimeter wave frequencies. For this review study, the development of the foliage loss prediction methods and the factors influencing the tree-induced shadowing effect are highlighted. In view of current research work in this area, some possible future works are proposed to improve the performance of modern wireless communication systems with the effect of foliage.

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Study of Propagation Loss Prediction in Forest Environment

Cited by 77 publications

References 51 publications

Path Loss Modeling for Near-Ground VHF Radio-Wave Propagation Through Forests With Tree-Canopy Reflection Effect

Path Loss Modeling for Near-Ground VHF Radio-Wave Propagation Through Forests With Tree-Canopy Reflection Effect

Model Development For Wireless Propagation In Forested Environments

Investigations of Foliage Effect on Modern Wireless Communication Systems: A Review

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