A SIMPLE WAY TO MODEL URBAN ATTENUATION USING FRIIS EQUATION
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN INFORMATION PROCESSING AND COMMUNICATION TECHNOLOGY
Author(s): FABIOLA MARTINEZ-ZUNIGA , JORGE SOSA-PEDROZA
Abstract: Friis equation describes relationship between power leaving transmitting antenna and power delivered by receiving antenna; we present in this paper a modification of the Friis Free Space Attenuation equation to model propagation in urban scenarios. We adjust it changing the exponent value of 2 and adding an arbitrary attenuation factor to fit regression curves obtained from measurements made in Mexico City in the frequency of 3.3 GHz, after find scenarios with similar characteristics in different places of Mexico City.
- Publication Date: 08-Jun-2014
- DOI: 10.15224/978-1-63248-021-7-82
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PROPOSAL FOR COMPUTING AREAS OF POLYGONS IN GEOGRAPHIC INFORMATION SYSTEM. COMPUTATIONAL ANALYSIS
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN INFORMATION PROCESSING AND COMMUNICATION TECHNOLOGY
Author(s): LIDISY HERNÁNDEZ MONTERO, , LIDISY HERNÁNDEZ MONTERO , ROMANUEL RAMON ANTUNEZ
Abstract: Most of spatial analyzes in geographic information systems (GIS) use simple geometric calculations, from which more complex algorithms are built. Traditionally these calculations have been conducted in Euclidean metric, but the geographical information has become more available and planimetric accuracy what has caused these calculations in GIS are inaccurate. These errors could become significantly important in some individuals cases, such as large geographical areas or equidistant projections. Therefore in this paper we proposed an algorithm for calculating the area of polygons supported in a generic method that takes into account the coordinate system and / or projection with which it works, allowing a correct and efficient functioning in GIS applications.
- Publication Date: 08-Jun-2014
- DOI: 10.15224/978-1-63248-021-7-83
- Views: 0
- Downloads: 0