evaluation and performance analysis of propagation models for wimax
evaluation and performance analysis of propagation models for wimax
evaluation and performance analysis of propagation models for wimax
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: Street orientation angel w.r.t. direct radio path[degree]In our simulation we use the following data, i.e.building to building distance 50 m, street width 25 m,street orientation angel 30 degree in urban area <strong>and</strong> 40degree in suburban area <strong>and</strong> average building height 15m, base station height 30 m.4.9 Ericsson ModelTo predict the path loss, the network planningengineers are used s<strong>of</strong>tware provided by EricssonCompany is called Ericsson model. This model alsost<strong>and</strong>s on the modified Okumura-Hata model to allowroom <strong>for</strong> changing in parameters according to the<strong>propagation</strong> environment. Path loss according to thismodel is given by30Whereis defined byIRACST - International Journal <strong>of</strong> Advanced Computing, Engineering <strong>and</strong> Application (IJACEA),Vol. 1, No.1, 2012Fig. 1. Simulation<strong>for</strong> three differentprocess flow chartenvironments.In this model I have used three different environments(Urban, Suburban <strong>and</strong> Flat) with different parameter.5.3 Simulation ParameterThe following Table 4.2 presents the parameters weapplied in our simulation.ParametersValuesTransmitterheightantennaReceiver antenna heightOperating frequencyEND40 m in urban <strong>and</strong> 30m in suburban <strong>and</strong>20 m in rural area3 m, 6 m <strong>and</strong> 10 m2.5 GHzAnd parameters: Frequency [MHz]: Transmission antenna height [m]: Receiver antenna height [m]31Distance between Tx-RxBuilding to buildingdistanceAverage building heightStreet width5 km50 m15 m25 m5 SIMULATION ENVIRONMENT & MODELS5.1 Simulation EnvironmentFor analyzing the <strong>per<strong>for</strong>mance</strong> <strong>of</strong> <strong>propagation</strong> <strong>models</strong> <strong>for</strong>WiMAX, I have used MATLAB s<strong>of</strong>tware package.MATLAB is a s<strong>of</strong>tware package <strong>for</strong> high-<strong>per<strong>for</strong>mance</strong>numerical computation <strong>and</strong> visualization. It provides aninteractive environment with hundred <strong>of</strong> built-in function<strong>for</strong> technical computation, graphics <strong>and</strong> animation. Best<strong>of</strong> all, it also provides easy extensibility with its own highprogramminglanguage. The name MATLAB st<strong>and</strong>s <strong>for</strong>MATrix LABoratory.5.2 Simulation DesignFor evaluating <strong>and</strong> analyzing the <strong>per<strong>for</strong>mance</strong> <strong>of</strong>WiMAX <strong>propagation</strong> <strong>models</strong> I have used MATLABsimulation. A typical simulation model is shown in fig(4.1).Street orientation angle 30 0 in urban <strong>and</strong> 40 0in suburbanCorrection <strong>for</strong> shadowing 8.2 dB in suburban <strong>and</strong>rural <strong>and</strong>10.6 dB in urban areaTable 4.1: Simulation parameters6 PERFORMANCE ANALYSIS & DISCUSSION6.1 Analysis <strong>of</strong> simulation results in urban areaIn our calculation, we set 3 different antenna heights (i.e.3 m, 6 m <strong>and</strong> 10 m) <strong>for</strong> receiver, distance varies from250 m to 5 km <strong>and</strong> transmitter antenna height is 40 m.The numerical results <strong>for</strong> different <strong>models</strong> in urban area<strong>for</strong> different receiver antenna heights are shown in theFigure 2, 3 <strong>and</strong> 4.STARTInput ParameterChooseEnvironmentOutput Path lossFig. 2. Path loss in urban environment at 3 m receiverantenna height.21
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