en>ChrisGualtieri: General Fixes + MOS + DMY changes using AWB

2013-07-05T04:10:33Z

General Fixes + MOS + DMY changes using AWB

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	~~They call me Emilia~~. ~~Doing ceramics~~ is ~~what love doing~~. ~~For a while she~~'~~s been in South Dakota~~. ~~Managing people~~ is ~~what I do and~~ the ~~salary has been truly satisfying~~.<br><br>~~Stop by my blog home std test~~ ([~~http~~://~~Www~~.~~neweracinema~~.~~com~~/~~tube~~/~~blog~~/~~181510 what google did~~ to me])		{{Unreferenced\|date=November 2010}}

			'''Lee Model for Point-to-Point Mode''' is a [[radio propagation model]] that operates around 900 MHz. Built as two different modes, this model includes an adjustment factor that can be adjusted to make the model more flexible to different regions of propagation.

			==Applicable to/under conditions==

			This model is suitable for using in data collected in a specific area for Point to Point links.

			==Coverage==

			[[Frequency]]: 900 MHz band

			==Mathematical formulation==

			===The model===

			The Lee Model for point to point mode is formally expressed as:

			<math>L = L_0 \; + \; \gamma g\log d \; - 10 (\log {F_A} - 2 \log (\frac{H_{ET}}{30}))</math>


			where,

			''L'' = The [[median]] [[path loss]]. Unit: [[decibel]] (dB)

			''L''<sub>0</sub> = The reference path loss along 1 km. Unit: decibel (dB)

			<math>\gamma\;</math> = The [[slope]] of the path loss curve. Unit: decibels per decade

			''d'' = The distance on which the path loss is to be calculated. Unit: [[kilometer]] (km)

			''F''<sub>A</sub> = Adjustment factor.

			''H''<sub>ET</sub> = Effective height of terrain. Unit: [[meter]](m)

			===Calculation of reference path loss===

			The reference [[path loss]] is usually computed along a 1 km or 1 mi link. Any other suitable length of path can be chosen based on the applications.

			<math>L_0\;=\;G_B\;+\;G_M\;+\;20\;( \log \lambda \; - \log d\;) \; - \; 22</math>


			where,

			''G''<sub>B</sub> = [[Base station]] [[antenna gain]]. Unit: [[Decibel]] with respect to [[isotropic antenna]] (dBi)

			<math>\lambda</math> = [[Wavelength]]. Unit: meter (m).

			G<sub>M</sub> = [[Mobile station]] antenna gain. Unit: decibel with respect to [[isotropic antenna]] (dBi).

			===Calculation of adjustment factors===

			The adjustment factor is calculated as:

			<math>F_A\;=\;F_{BH}\;F_{BG}\;F_{MH}\;F_{MG}\;F_{F} </math>


			where,

			''F''<sub>BH</sub> = [[Base station]] antenna height correction factor.

			''F''<sub>BG</sub> = [[Base station]] antenna gain correction factor.

			''F''<sub>MH</sub> = [[Mobile station]] antenna height correction factor.

			''F''<sub>MG</sub> = [[Mobile station]] antenna gain correction factor.

			''F''<sub>F</sub> = [[Frequency]] correction factor

			===The base station antenna height correction factor===

			<math>F_1\;=\;\big(\frac{h_B} {30.48}\big)^2</math>

			where,

			h<sub>B</sub> = [[Base station]] antenna height. Unit: meter.

			===The base station antenna gain correction factor===

			<math>F_2\;=\;\frac{G_B}{4}</math>

			where,

			''G''<sub>B</sub> = [[Base station]] [[antenna gain]]. Unit: decibel with respect to [[half wave dipole]] (dBd)

			===The mobile station antenna height correction factor===

			<math>F_3 \; = \; \begin{cases} \frac{h_M}{3} \mbox{ if,} h_m > 3 \\ (\frac{h_M}{3})^2 \mbox{ if,} h_M \le 3 \end{cases}</math>

			where,

			''h''<sub>M</sub> = [[Mobile station]] antenna height. Unit: meter.

			===The mobile antenna gain correction factor===

			<math>F_4\;=\;G_M</math>

			where,

			G<sub>M</sub> = [[Mobile station]] [[antenna gain]]. Unit:[[Decibel]] with respect to [[half wave dipole antenna]] (dBd).

			=== The frequency correction factor ===

			<math>F_5\;=\;(\frac{f}{900})^{-n} \mbox{ for } 2< n <3</math>

			where,

			''f'' = [[Frequency]]. Unit: [[megahertz]] (MHz)

			===Effective terrain slope calculation===

			This is computed in the following way:

			# [[Extrapolate]] terrain slope at the mobile station to the base station.
			# Compute the vertical antenna height over the extrapolation line.

			==See also==

			*[[Hata Model for Urban Areas]]
			*[[Hata Model for Suburban Areas]]
			*[[Hata Model for Open Areas]]
			*[[Okumura Model for Urban Areas]]
			*[[Cost 231 Model\|COST 231 Model]]
			*[[Young Model]]
			*[[Area to Area Lee Model]]

			[[Category:Radio frequency propagation]]

en>Danhash: /* See also */ rm red links

2012-03-26T15:26:08Z

FELICS - Revision history

en>ChrisGualtieri: General Fixes + MOS + DMY changes using AWB

en>Danhash: /* See also */ rm red links