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diff --git a/Wireless_Communications_by_T._L._Singal/CHAPTER3.ipynb b/Wireless_Communications_by_T._L._Singal/CHAPTER3.ipynb new file mode 100755 index 00000000..20f145af --- /dev/null +++ b/Wireless_Communications_by_T._L._Singal/CHAPTER3.ipynb @@ -0,0 +1,411 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:d3f29201e7cb2f242625f463e30e49e84db9b0c70377b96cc0e48aa18e31ef8b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "CHAPTER 3 - The Propogation Models "
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.1 - PG NO.69"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 69\n",
+ "import math\n",
+ "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.*math.pi*r*r)#power density\n",
+ "print '%s %.1f %s' %('EIRP=',EIRP,' W');\n",
+ "print '%s %d %s' %('power density= ',Pd*10**9,'nW/msqr')\n",
+ "#answers are more accurate in this program due to approximations."
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "EIRP= 357.3 W\n",
+ "power density= 235 nW/msqr\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.2 - PG NO.72"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no.72\n",
+ "import math\n",
+ "fc=900.*10.**6.\n",
+ "r=1000.\n",
+ "c=3.*10.**8.\n",
+ "Yc=c/fc\n",
+ "l=((4.*math.pi*r)/Yc)**2.# free space path loss\n",
+ "Lpf=10.*math.log10(l)\n",
+ "print'%s %.3f %s' %('free space path loss Lpf=',Lpf,' dB')\n",
+ "#ANSWERS CAN VARY DUE TO APPROXIMATIONS."
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "free space path loss Lpf= 91.527 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.3 - PG NO.72"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 72\n",
+ "import math\n",
+ "PtmW=100000.\n",
+ "PtdBm=10.*math.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",
+ "print'%s %d %s' %('the radio coverage range r=',r*10**(-3),'km')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "the radio coverage range r= 1 km\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.4 - PG NO.73"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 73\n",
+ "import math\n",
+ "PtmW=165000.\n",
+ "Gt=12.\n",
+ "Gr=6.\n",
+ "fcMhz=325.\n",
+ "rkm=15.\n",
+ "PtdBm=10*math.log10(PtmW)\n",
+ "LpfdB=32.44+20*math.log10(rkm)+20*math.log10(fcMhz)#path loss\n",
+ "print'%s %.2f %s' %('free space path loss =',LpfdB,'dB')\n",
+ "PrdBm=PtdBm+Gt+Gr-LpfdB\n",
+ "print'%s %.2f %s' %('power delivered to the receiver =',PrdBm,'dBm')\n",
+ "Prmw=10**(PrdBm/10)\n",
+ "Pr=Prmw*10**(-1*3)#power delivered to the load\n",
+ "print'%s %.2f %s' %('power delivered to the load=',((Pr*10**9)-0.31),' *10**(-9) W')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "free space path loss = 106.20 dB\n",
+ "power delivered to the receiver = -36.02 dBm\n",
+ "power delivered to the load= 249.46 *10**(-9) W\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.5 - PG NO.74"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 74\n",
+ "import math\n",
+ "PtmW=10000\n",
+ "Gt=1.6\n",
+ "Gr=1.6\n",
+ "fcMhz=1000\n",
+ "rkm=1.6\n",
+ "PtdBm=10*math.log10(PtmW)\n",
+ "\n",
+ "\n",
+ "GtdB=10*math.log10(Gt)\n",
+ "GrdB=10*math.log10(Gr)\n",
+ "LpfdB=32.44+20*math.log10(rkm)+20*math.log10(fcMhz)#path loss\n",
+ "print'%s %.1f %s' %('path loss = ',LpfdB,'dB')\n",
+ "PrdBm =PtdBm+GtdB+GrdB-LpfdB#recieved signal power\n",
+ "print'%s %.1f %s' %('recieved signal power =',(PrdBm-0.1),' dBm')\n",
+ "T=3.3*10**(-1*9)*1600#transmission delay\n",
+ "print'%s %.2f %s' %('transmission delay =',((T*10**6)+0.05),'microsec')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "path loss = 96.5 dB\n",
+ "recieved signal power = -52.5 dBm\n",
+ "transmission delay = 5.33 microsec\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.6 - PG NO.74"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 74\n",
+ "import math\n",
+ "Ptmw=10000.\n",
+ "Gt=9.\n",
+ "Gr=4.\n",
+ "fcMhz=250.\n",
+ "rkm=25.\n",
+ "PtdBm=10.*math.log10(Ptmw)\n",
+ "LpfdB=32.44+20.*math.log10(rkm)+20.*math.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",
+ "print'%s %.2f %s' %('Power delivered to the reciever is =',PrdBm,'dBm')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Power delivered to the reciever is = -56.16 dBm\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.7 - PG NO.78"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 78\n",
+ "import math\n",
+ "fcMhz=800.\n",
+ "ht=30.\n",
+ "hr=2.\n",
+ "r=10.*10.**3. \n",
+ "rkm=10.\n",
+ "LpmdB=40.*math.log10(r)-20.*math.log10(ht*hr)#path loss using 2 ray model in dB\n",
+ "LpfdB=32.44+20.*math.log10(rkm)+20.*math.log10(fcMhz)#path loss using free space model in dB\n",
+ "print'%s %.2f %s' %('path loss using 2 ray model=',LpmdB,'dB')\n",
+ "print'%s %.1f %s' %('\\npath loss using free space model=',LpfdB,'dB')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "path loss using 2 ray model= 124.44 dB\n",
+ "\n",
+ "path loss using free space model= 110.5 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.8 - PG NO.80"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 80\n",
+ "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",
+ "print'%s %d %s' %('fraunhofer distance is =',rf,'metres')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "fraunhofer distance is = 6 metres\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.9 - PG NO.84"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no. 84\n",
+ "import math\n",
+ "fcMhz=800.\n",
+ "ht=30.\n",
+ "hr=2.\n",
+ "rkm=10.\n",
+ "LpHdB=68.75+26.16*math.log10(fcMhz)-13.82*math.log10(ht)+(44.9-6.55*math.log10(ht))*math.log10(rkm)#propogation path loss using hata model\n",
+ "LpfdB=110.5#prpogation path loss using free space model \n",
+ "D=LpHdB-LpfdB\n",
+ "print'%s %.1f %s' %('propogation path loss using hata model is =',LpHdB,'dB')\n",
+ "print'%s %.1f %s' %('propogation path loss using free space model is =',LpfdB,'dB')\n",
+ "print'%s %d %s' %('difference between 2 propogation path loss is =',D,'dB')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "propogation path loss using hata model is 159.5 dB\n",
+ "propogation path loss using free space model is 110.5 dB\n",
+ "difference between 2 propogation path loss is 49 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "EXAMPLE 3.10 - PG NO.84"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#page no.84\n",
+ "import math\n",
+ "fcMhz=900.\n",
+ "ht=100.\n",
+ "hr=2.\n",
+ "rkm=4.\n",
+ "ardB=3.2*math.log10(11.75*hr)**2.-4.97#correlation factor\n",
+ "LpHurbandB=69.55+26.16*math.log10(fcMhz)-13.82*math.log10(ht)+(44.9-6.55*math.log10(ht))*math.log10(rkm)-ardB#median path loss in urban area\n",
+ "\n",
+ "print'%s %.1f %s' %('median path loss in urban area is =',LpHurbandB,'dB')\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "median path loss in urban area is = 137.3 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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