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Diffstat (limited to 'Modern_Electronics_Communication/chapter13.ipynb')
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diff --git a/Modern_Electronics_Communication/chapter13.ipynb b/Modern_Electronics_Communication/chapter13.ipynb new file mode 100755 index 00000000..f28a3b72 --- /dev/null +++ b/Modern_Electronics_Communication/chapter13.ipynb @@ -0,0 +1,238 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:358c1b86e82f27b9eee799b4793457200c3f930f370a7e7347103331d9245d4d"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 13 Wave Propagation"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.1 Page no 628"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "x=(2*(1/2.0))\n",
+ "a=15\n",
+ "d=53.5*10**-6 #duration for each horizontal line on the reciever\n",
+ "t=1/186000.0 #time delay between direct and reflected signal\n",
+ "\n",
+ "#calculation\n",
+ "g=(t/d)*a #ghost width\n",
+ "\n",
+ "#result\n",
+ "print\"ghost width = \",round(g,2),\"in.\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "ghost width = 1.51 in.\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.2 Page no 641"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "S=83 #satellite longitude in degrees\n",
+ "N=90 #site longitude in degrees\n",
+ "L=35 #site longitude in degrees\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "b=0.1512 #constant in equation\n",
+ "A=180+math.atan(math.tan(-7*3.14/180)/math.sin(35*3.14/180))*180/3.14 \n",
+ "E=math.atan((math.cos((S-N)*3.14/180)*math.cos(L*3.14/180)-b)/math.sqrt(1-((math.cos(L*3.14/180))**2*(math.cos((S-N)*3.14/180))**2)))*180/3.14\n",
+ "\n",
+ "#Result\n",
+ "print\"The azimuth is equal to A = \",round(A,0),\"degree\"\n",
+ "print\"the elevation angle = \",round(E,1),\"degree\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The azimuth is equal to A = 168.0 degree\n",
+ "the elevation angle = 48.7 degree\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.3 Page no 646"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "import math\n",
+ "x=(32+(44/60.0)+(36/3600.0)) # N latitude\n",
+ "y=(106+(16/60.0)+(37/3600.0)) #W longitude\n",
+ "D=42.1642*10**6 #distance from the satellite to the center of the earth\n",
+ "R=6.378*10**6 #earth's radius\n",
+ "a=32.74333*3.14/180.0 #in degree\n",
+ "B=-7.27694*3.14/180.0 #in degree\n",
+ "\n",
+ "#calculation\n",
+ "q=math.cos(a)*math.cos(B)\n",
+ "\n",
+ "d=math.sqrt(D**2+R**2-(2*D*R*q))\n",
+ "c=2.997925*10**5 #velocity of light\n",
+ "de=d/c\n",
+ "rd=(2*d)/c\n",
+ "\n",
+ "#result\n",
+ "print\"N longitude converted into degrees = \",round(x,2)\n",
+ "print\"W longitude coverted into degrees =\",round(y,2)\n",
+ "print\"distance = \",round(d/1000,1),\"*10**6 meters\"\n",
+ "print\"delay =\",round(de/1000,3),\"seconds\"\n",
+ "print\"roundtrip delay = \",round(rd/1000,3),\"seconds\" \n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "N longitude converted into degrees = 32.74\n",
+ "W longitude coverted into degrees = 106.28\n",
+ "distance = 37009.1 *10**6 meters\n",
+ "delay = 0.123 seconds\n",
+ "roundtrip delay = 0.247 seconds\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.4 Page no 651"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "G=45 #antenna gain\n",
+ "nt=25 #antenna noise temperature\n",
+ "nt1=70 #LNB noise temperature\n",
+ "nt2=2 #noise temperature(reciever and passive components)\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "T=nt+nt1+nt2 #total noise temperature\n",
+ "x=G-10*math.log10(T) #figure of merit\n",
+ "\n",
+ "#result\n",
+ "print\"Sum of all of the noise temperature contributions Ts = \",T,\"k\"\n",
+ "print\"The figure of merit = \",round(x,2),\"dB\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Sum of all of the noise temperature contributions Ts = 97 k\n",
+ "The figure of merit = 25.13 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 19
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 13.5 Page no 652"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "d=41.130383*10**6 #dismath.tance\n",
+ "c=2.997925*10**8 #velocity of light\n",
+ "f=14.25*10**9 #uplink frequency\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "h=c/f #wavelength\n",
+ "x=(4*math.pi*d)/h\n",
+ "Lp=20*math.log10(x) #free-space path loss\n",
+ "\n",
+ "#result\n",
+ "print\"The wavelength is= \",round(h,2)\n",
+ "print\"Lp(dB)= \",round(Lp,2),\"dB\"\n",
+ "#INcorrect answer of h in the textbook"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The wavelength is= 0.02\n",
+ "Lp(dB)= 207.81 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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