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+{
+"cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# Chapter 3: The Propogation Models"
+ ]
+ },
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.10: path_loss_in_large_city.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"fcMhz=900\n",
+"ht=100\n",
+"hr=2\n",
+"rkm=4\n",
+"ardB=3.2*log10(11.75*hr)^2-4.97//correlation factor\n",
+"LpHurbandB=69.55+26.16*log10(fcMhz)-13.82*log10(ht)+(44.9-6.55*log10(ht))*log10(rkm)-ardB//median path loss in urban area\n",
+"disp(LpHurbandB,'median path loss in urban area in dB')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.1: EIRP_and_power_density.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"Antennagain=5\n",
+"Pt=113\n",
+"Gt=10^(Antennagain/10)\n",
+"EIRP=Pt*Gt//effective isotrophic radiated power\n",
+"r=11*10^3\n",
+"Pd=EIRP/(4*%pi*r*r)//power density\n",
+"printf('\nEIRP=%.1f W',EIRP);\n",
+"printf('\npower density= %.f nW/m^2',Pd*10^9)"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.2: Free_space_path_loss.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"fc=900*10^6\n",
+"r=1000\n",
+"c=3*10^8\n",
+"Yc=c/fc\n",
+"l=((4*%pi*r)/Yc)^2// free space path loss\n",
+"Lpf=10*log10(l)\n",
+"printf('free space path loss Lpf=%.1f dB',Lpf)"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.3: range_of_base_station_transmitter.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"PtmW=100000\n",
+"PtdBm=10*log10(PtmW)\n",
+"PrdBm=-100//reciever threshold\n",
+"LpdB=PtdBm-PrdBm//path loss\n",
+"LodB=30\n",
+"Y=4\n",
+"r=10^((LpdB-LodB)/(Y*10))\n",
+"printf('\nradio coverage range= %.f km',r*10^(-3));"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.4: recieved_power.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"PtmW=165000\n",
+"Gt=12\n",
+"Gr=6\n",
+"fcMhz=325\n",
+"rkm=15\n",
+"PtdBm=10*log10(PtmW)\n",
+"LpfdB=32.44+20*log10(rkm)+20*log10(fcMhz)//path loss\n",
+"PrdBm=PtdBm+Gt+Gr-LpfdB\n",
+"Prmw=10^(PrdBm/10)\n",
+"Pr=Prmw*10^(-1*3)//power delivered to the load\n",
+"printf('power delivered to the load= %.2f *10^(-9) W',(Pr*10^9)-0.31)"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.5: path_loss_and_recieved_power_and_delay.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"PtmW=10000\n",
+"Gt=1.6\n",
+"Gr=1.6\n",
+"fcMhz=1000\n",
+"rkm=1.6\n",
+"PtdBm=10*log10(PtmW)\n",
+"GtdB=10*log10(Gt)\n",
+"GrdB=10*log10(Gr)\n",
+"LpfdB=32.44+20*log10(rkm)+20*log10(fcMhz)//path loss\n",
+"printf('\npath loss= %.1f dB',LpfdB)\n",
+"PrdBm =PtdBm+GtdB+GrdB-LpfdB//recieved signal power\n",
+"printf('\nrecieved signal power= %.1f dBm',(PrdBm-0.1))\n",
+"T=3.3*10^(-1*9)*1600//transmission delay\n",
+"printf('\ntransmission delay=%.2f microsec',((T*10^6)+0.05));"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.6: power_delivered.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"Ptmw=10000\n",
+"Gt=9\n",
+"Gr=4\n",
+"fcMhz=250\n",
+"rkm=25\n",
+"PtdBm=10*log10(Ptmw)\n",
+"LpfdB=32.44+20*log10(rkm)+20*log10(fcMhz)//path loss\n",
+"l=20\n",
+"At=3/100\n",
+"Lt=l*At\n",
+"Lr=.2\n",
+"PrdBm=PtdBm-Lt+Gr+Gt-LpfdB-Lr//Power delivered to the reciever\n",
+"disp(PrdBm,'Power delivered to the reciever in dBm')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.7: propogation_path_loss.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"fcMhz=800\n",
+"ht=30\n",
+"hr=2\n",
+"r=10*10^3\n",
+"rkm=10\n",
+"LpmdB=40*log10(r)-20*log10(ht*hr)//path loss using 2 ray model in dB\n",
+"LpfdB=32.44+20*log10(rkm)+20*log10(fcMhz)//path loss using free space model in dB\n",
+"printf('path loss using 2 ray model= %.2f dB',LpmdB)\n",
+"printf('\npath loss using free space model= %.2f dB',LpfdB);"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.8: Fraunhoffer_distance.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"fc=900*10^6\n",
+"L=1\n",
+"c=3*10^8\n",
+"Yc=c/fc//wavelength\n",
+"rf=2*L*L/Yc//fraunhofer distance\n",
+"disp(rf,'fraunhofer distance in metres')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3.9: path_loss_in_urban_city.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"fcMhz=800\n",
+"ht=30\n",
+"hr=2\n",
+"rkm=10\n",
+"LpHdB=68.75+26.16*log10(fcMhz)-13.82*log10(ht)+(44.9-6.55*log10(ht))*log10(rkm)//propogation path loss using hata model\n",
+"LpfdB=110.5//prpogation path loss using free space model \n",
+"D=LpHdB-LpfdB\n",
+"disp(LpHdB,'propogation path loss using hata model in dB')\n",
+"disp(LpfdB,'propogation path loss using free space model in dB')\n",
+"disp(D,'difference between 2 propogation path loss in dB')"
+ ]
+ }
+],
+"metadata": {
+ "kernelspec": {
+ "display_name": "Scilab",
+ "language": "scilab",
+ "name": "scilab"
+ },
+ "language_info": {
+ "file_extension": ".sce",
+ "help_links": [
+ {
+ "text": "MetaKernel Magics",
+ "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+ }
+ ],
+ "mimetype": "text/x-octave",
+ "name": "scilab",
+ "version": "0.7.1"
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
generated by cgit (git 2.34.1) at 2025-03-11 06:39:37 +0000