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Diffstat (limited to 'Optical_fiber_communication_by_gerd_keiser/chapter1_2.ipynb')
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diff --git a/Optical_fiber_communication_by_gerd_keiser/chapter1_2.ipynb b/Optical_fiber_communication_by_gerd_keiser/chapter1_2.ipynb new file mode 100755 index 00000000..668d3a3b --- /dev/null +++ b/Optical_fiber_communication_by_gerd_keiser/chapter1_2.ipynb @@ -0,0 +1,251 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:f6057f567522f2ec05cc49c207f47842aee03556e2aab087a974cae3593d6b0b"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 1: Overview of optical fiber communication"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.1, Page Number: 8"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#variable declaration\n",
+ "f1 = 100*1e3 #frequency1 = 100KHz\n",
+ "f2 = 1e9 #frequency2 = 1GHz\n",
+ "T1 = 1.0/f1 #Time period1 = 0.01ms\n",
+ "T2 = 1.0/f2 #Time period2 = 1 ns\n",
+ "\n",
+ "#calculation\n",
+ "phi = (0.25)*360.0 # Phase shift(degree)\n",
+ "\n",
+ "#result\n",
+ "print \"Phase shift = \",round(phi),\"Degree\",\"= \",round((round(phi)*math.pi)/180,4), \"radian\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Phase shift = 90.0 Degree = 1.5708 radian\n"
+ ]
+ }
+ ],
+ "prompt_number": 24
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.2, Page Number: 10"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#variable Declaration\n",
+ "flow=10*1e3 #Lowest frequency(KHz)\n",
+ "fhigh=100*1e3 #Highest frequency(KHz)\n",
+ "\n",
+ "#calculation\n",
+ "bandwidth=fhigh-flow #bandwidth(KHz)\n",
+ "\n",
+ "#result\n",
+ "print \"Bandwidth=\",bandwidth/1000 ,\"KHz\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Bandwidth= 90.0 KHz\n"
+ ]
+ }
+ ],
+ "prompt_number": 25
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.4, Page Number: 12"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#variable Declaration\n",
+ "B = 10*1e6 # Bandwidth of noisy channel 1MHZ\n",
+ "S_N = 1 # signal to noise ratio is 1\n",
+ "\n",
+ "#calculation\n",
+ "C=B*(math.log(1+S_N)/math.log(2)) #capacity of channel(Mb/s)\n",
+ "\n",
+ "#result\n",
+ "print \"Capacity of channel =\",C/(10*1e6),\"Mb/s\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Capacity of channel = 1.0 Mb/s\n"
+ ]
+ }
+ ],
+ "prompt_number": 26
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.5, Page Number: 12"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#variable Declaration\n",
+ "fLow = 3*1e6 #low frequency = 3MHz\n",
+ "fHigh = 4*1e6 #high frequency = 4MHz\n",
+ "SNR_dB = 20 #signal to noise ratio 20 dB\n",
+ "\n",
+ "#calculation\n",
+ "B = fHigh-fLow #Bandwidth(MHz)\n",
+ "S_N = 10**(SNR_dB/10) #signal to noise ratio\n",
+ "C = B*(math.log(1+S_N)/math.log(2)) #capacity of channel(Mb/s)\n",
+ "\n",
+ "#result\n",
+ "print \"Capacity of channel=\",round(C/(1e6),1),\"Mb/s\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Capacity of channel= 6.7 Mb/s\n"
+ ]
+ }
+ ],
+ "prompt_number": 27
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.6, Page Number: 14"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#variable Declaration\n",
+ "P1 = 1 # Let p1 be 1 watt\n",
+ "P2 = P1*0.5 # P2 is half of p1 so 1/2\n",
+ "\n",
+ "#calculation\n",
+ "Atten_dB = 10*(math.log(P2/P1)/math.log(10)) #attenuation or loss of power(dB)\n",
+ "\n",
+ "#result\n",
+ "print \"Attenuation loss =\",round(Atten_dB,0), \"dB\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Attenuation loss = -3.0 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 28
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.7, Page Number: 14"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math\n",
+ "\n",
+ "#variable Declaration\n",
+ "Loss_line1 = -9 #attenuation of signal between point 1 to 2 = 9 dB\n",
+ "Amp_gain2 = 14 #Amplification of signal between point 2 to 3 = 14 dB\n",
+ "Loss_line3 = -3 #attenuation of signal between point 3 to 4 = 3 dB\n",
+ "\n",
+ "#calculation\n",
+ "dB_at_line4 = Loss_line1+Amp_gain2+Loss_line3 #power gain(dB)\n",
+ "\n",
+ "#result\n",
+ "print \"Power gain for a signal travelling from point1 to another point4 = \",dB_at_line4, \"dB\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Power gain for a signal travelling from point1 to another point4 = 2 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 29
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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