The influence of trees on radio channels at frequencies of 3 and 5 GHz

Schuh, R.E.; Bergljung, C.; Karlsson, Peter; Lowendahl, N.

doi:10.1109/vtc.2001.957096

Cited by 11 publications

(8 citation statements)

References 3 publications

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“…For the case due to the effect of a building, the losses at different distances under consideration were between 7.72 and 12.84 dB. The result obtained for the scenario where the Lionet signal was obstructed by a single tree, agreed with the field measurement results obtained by Karlsson et al [24] in which the path loss is between 1 and 16 dB at 3.1 and 5.8 GHz frequencies. Also, the results obtained due to the obstruction of the Lionet signal by a building conformed to result of building penetration loss reported by Durgin et al [25] at an average value of 14 d B.…”

Section: Comparison Of the Simul Ated Results With The Fiel D Measuresupporting

confidence: 86%

“…The result showed that point-to-point link which was obstructed by a single t ree and a ro w of t rees recorded an average of 12.2615 dB and 4.6306 dB excess path losses respectively [10]. In [16], study on the influence of trees on radio channel at frequencies of 3 and 5 GHz shows that the excess path loss was between 1 and 16 dB. For the measurements carried out in the residential areas and homes for the transmission frequency in the 5.85 GHz band, building penetration attenuation was reported at an average of 14 d B [10].…”

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confidence: 99%

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The Limitations of Campus Wireless Networks: A Case Study of University of Nigeria, Nsukka[Lionet]

Nwawelu¹,

Nzeako²,

Ahaneku³

2012

IJNC

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This work studied the effects of physical environ ment (trees and buildings) obstructions on the Lionet in Nsukka campus of the Un iversity of Nigeria. The effects of these obstructions were measured by the variation in path loss and received signal strength as functions of distance using computer simu lation and field measurement. The simulat ion results were co mpared with the field measurement results, conducted under free space condition and where the Lionet signal was obstructed by trees and buildings. The results show that trees and buildings have significant effects on the path loss and the received signal strength of the Lionet. The study therefore reco mmends that the power level of the Lionet should be imp roved for efficient performance, mo re access points should be deployed at locations where obstructions are prevalent, and Lionet should possibly migrate fro m wireless to fibre optic network.

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Section: Comparison Of the Simul Ated Results With The Fiel D Measuresupporting

confidence: 86%

mentioning

confidence: 99%

The Limitations of Campus Wireless Networks: A Case Study of University of Nigeria, Nsukka[Lionet]

Nwawelu¹,

Nzeako²,

Ahaneku³

2012

IJNC

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“…The frequency dependence of vegetation effects for satellite links was studied in [13] and some attenuation measurements were performed at L-, S-and C-bands taking into consideration elevation angles between 25º and 90º [14]. Tree shadowing effects on wideband channel at 3.1 GHz and 5.8 GHz were studied in [15]. Additionally, for different terrestrial scenarios and different frequency bands, ITU-R Recommendation [16] also includes vegetation attenuation models not valid for high elevation scenarios.…”

Section: Introductionmentioning

confidence: 99%

Single Tree Vegetation Depth Estimation Tool for Satellite Services Link Design

Hasirci¹,

Çavdar

Öztürk

2016

RADIOENGINEERING

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“…The influence of trees on the radio channel at carrier frequencies of 3 and 5 GHz, was studied in [102]. Masui et al in [85], proposed a new path loss model for the characterization of microwave urban LOS propagation.…”

Section: Introductionmentioning

confidence: 99%