SYSC5606-3 - Propagation Modeling PROPAGATION ENVIRONMENTS...

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SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 1 Propagation Modeling Propagation Modeling ± PROPAGATION ENVIRONMENTS ² Terrain Types ² Parameters ± PATHLOSS PREDICTION ² Models for Large Outdoor Cells ² Models for Microcells ² Models for Indoor Cells ² Link Budget ± FADING, SHADOWING AND DOPPLER ² Narrowband Channels ² Fading and Shadowing ² Effect of Motion Large Scale Variations Small Scale Variations ² Propagation Mechanisms ² Impairments SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 2 PROPAGATION ISSUES PROPAGATION ISSUES ATTENUATION MULTIPATH MOTION ³ CELLULAR STRUCTURE ³ INTERFERENCE ³ FREQUENCY RE-USE ³ FADING ³ SHADOWING ³ DELAY SPREAD ³ INTER-SYMBOL- INTERFERENCE. ³ DOPPLER ³ TIME VARYING FADING SIGNAL DESIGN & DETECTION TECHNIQUES CELLULAR DESIGN HAND-OFF
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SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 3 TERRAIN Business Area Residential Open LANDSCAPE Building Heights Street Width Foliage Land / Water Mountains Slopes BUILDING Number of Floors Floor Heights Building Materials LAYOUT Open areas Halls / Rooms Doors / Corridors FUNCTION Level of Activities Contents OUTDOOR INDOOR FREQUENCY BAND ANTENNA SIGNAL BANDWIDTH GENERAL PROPAGATION PARAMETERS PROPAGATION PARAMETERS SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 4 LARGE SCALE PATHLOSS LARGE SCALE PATHLOSS ± PATHLOSS MODELS ESTIMATE THE MEAN SIGNAL LEVEL AS A FUNCTION OF DISTANCE ± THE MODELS ARE GROUPED INTO THREE CLASSES: ± (1) LARGE OUTDOOR CELLS ± (2) SMALL OUTDOOR CELLS ± (3) INDOOR CELLS ± THE MODELING TECHNIQUES DEPEND ON THE ENVIRONMENT BUT ARE MOSTLY HYBRID ANALYTICAL / EMPIRICAL.
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SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 5 D O D pathloss P(D) P transmit P(D o ) Far field Near field Reference point RX TX GENERAL MODEL GENERAL MODEL SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 6 MEAN SIGNAL LEVEL THE AVERAGE POWER LEVEL RECEIVED AT DISTANCE “D” FROM THE TRANSMITTER IN dBm PATHLOSS (P L ) THE RATIO BETWEEN THE TRANSMITTED POWER AND THE MEAN SIGNAL LEVEL AT DISTANCE “D” EXPRESSED IN dB . REFERENCE POINT A POINT NEAR THE TRANSMITTER, “D O THAT MARKS THE TRANSITION FROM NEAR FIELD TO FAR FIELD. P PD P P L transmit o o transmit == 10 10 log () log P L (D) = P L (D O ) + LOSS FROM D O TO D (in dB) Definitions Definitions
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SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 7 LARGE CELLS VEHICULAR RURAL AND OPEN AREA HIGHWAYS SMALL CELLS BUSINESS AREAS SUBURBAN COMMUNITIES AROUND BUILDINGS INDOOR CELLS SINGLE FLOOR BUILDINGS MULTI-FLOOR BUILDINGS SHOPPING CENTERS SPORTS FACILITIES THE WIRELESS ENVIRONMENT THE WIRELESS ENVIRONMENT SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 8 Indoor Outdoor Small Large Statistical Models Data-Based Models Analytical / Statistical Site-specific Site-specific Simple Statistical Large dataBase of data about building parameters OVERVIEW OVERVIEW
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SYSC 5606 - 3 Copyright © 1995-2009 by R.H.M. Hafez 9 u RADIUS IS LARGE > 300 m u LINE-OF-SIGHT IS RARELY PRESENT u BASE STATION ANTENNA IS HIGH > 20 m u TERRAIN IS OFTEN CLASSIFIED AS: (1) URBAN (2) SUBURBAN (3) OPEN u MODELS ACCOUNT FOR MAJOR
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This note was uploaded on 10/24/2009 for the course SCE Sysc5606 taught by Professor Roshdy during the Spring '09 term at Carleton CA.

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SYSC5606-3 - Propagation Modeling PROPAGATION ENVIRONMENTS...

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