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Diffstat (limited to 'Optical_fiber_communication_by_gerd_keiser/chapter8_1.ipynb')
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1 files changed, 0 insertions, 335 deletions
diff --git a/Optical_fiber_communication_by_gerd_keiser/chapter8_1.ipynb b/Optical_fiber_communication_by_gerd_keiser/chapter8_1.ipynb deleted file mode 100755 index 7624efd8..00000000 --- a/Optical_fiber_communication_by_gerd_keiser/chapter8_1.ipynb +++ /dev/null @@ -1,335 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:c41fce225679ac457a37b8135a3b4343e35e5bc26e64b35427fb89f090d39c55"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Chepter 8: Digital links"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.1, Page Number: 287"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "system_margin = 6 # (dB)\n",
- "alpha = 3.5 #attenuation (dB/Km)\n",
- "L =6 #Length of transmission path (Km)\n",
- "lc = 1 #connector loss (dB)\n",
- "\n",
- "#calculation\n",
- "PT = 2*lc+alpha*L+system_margin #total optical power loss(dB)\n",
- "\n",
- "#result\n",
- "print \"Total optical power loss = \" , round(PT) ,\"dB\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Total optical power loss = 29.0 dB\n"
- ]
- }
- ],
- "prompt_number": 34
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.2, Page Number: 288"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "Ps = 3 #laser output (dBm)\n",
- "APD_sen = -32 #APD sensitivity (dBm)\n",
- "lsc = 1 #source connectorloss (dB)\n",
- "ljc = 2*4 #two (jumper+connector loss) (dB)\n",
- "alpha = 0.3 #attenuation (dB/Km)\n",
- "L = 60 #cable length (Km)\n",
- "cable_att = alpha*60 #cable attenuation (dB)\n",
- "lrc = 1 #receiver connector loss (dB)\n",
- "\n",
- "#calculation\n",
- "Allowed_Loss = Ps-APD_sen # (dB)\n",
- "system_margin = Allowed_Loss-lsc-ljc-cable_att-lrc #system margin(dB)\n",
- "\n",
- "#result\n",
- "print \"Allowed loss between light source and photodetector = \",Allowed_Loss,\"dB\"\n",
- "print \"The Final power margin = \" , round(system_margin) , \"dB\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Allowed loss between light source and photodetector = 35 dB\n",
- "The Final power margin = 7.0 dB\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.3, Page Number: 291"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "t_tx = 15*10**-9 #transmitter rise time(ns)\n",
- "t_mat = 21*10**-9 #material dispersion related rise time(ns)\n",
- "t_mod = 3.9*10**-9 #rise time resulting from modal dispersion(ns)\n",
- "t_rx = 14*10**-9 #receiver rise time(ns)\n",
- "\n",
- "#calculation\n",
- "tsys = math.sqrt(t_tx**2+t_mat**2+t_mod**2+t_rx**2) #link rise time(ns)\n",
- "\n",
- "#result\n",
- "print \"Link rise time = \" , round(tsys*10**9),\"ns\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Link rise time = 30.0 ns\n"
- ]
- }
- ],
- "prompt_number": 3
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.4, Page Number: 292"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "t_tx = 25*10**-12 #transmission rise time (sec)\n",
- "t_GVD = 12*10**-12 #GVD rise time (sec)\n",
- "t_rx = 0.14*10**-9 #receiver rise time (sec)\n",
- "\n",
- "#calculation\n",
- "tsys = math.sqrt(t_tx**2+t_GVD**2+t_rx**2) #Link rise time(ns)\n",
- "\n",
- "#result\n",
- "print \"System rise time = \" , round(tsys*10**9,2) , \"ns\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "System rise time = 0.14 ns\n"
- ]
- }
- ],
- "prompt_number": 4
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.5, Page Number: 306"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "bit_error_dur = 1*10**-3 #bit-corrupting burst noise duration (ms)\n",
- "B = 10*10**3 #data rate (kb/sec)\n",
- "\n",
- "#calculation\n",
- "N = B*bit_error_dur #number of bits affected by by burst error (MB/s)\n",
- "\n",
- "#result\n",
- "print \"Number of bits affected by a burst error = \" , round(N) , \"Mb/s\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Number of bits affected by a burst error = 10.0 Mb/s\n"
- ]
- }
- ],
- "prompt_number": 5
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.6, Page Number: 308"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "x=1\n",
- "\n",
- "#calculation\n",
- "polynomial = str(x**7)+\"0\"+str(x**5)+\"0\"+\"0\"+str(x**2)+str(x)+\"1\" #generator polynommial\n",
- "\n",
- "#result\n",
- "print \"The generator polynomial to 8-bit binary represantation = \",polynomial"
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "The generator polynomial to 8-bit binary represantation = 10100111\n"
- ]
- }
- ],
- "prompt_number": 39
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.8, Page Number: 309"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "N = 32.0 #number of CRC\n",
- "\n",
- "#calculation\n",
- "Ped = 1.0-(1.0/(2.0**N)) #burst error\n",
- "\n",
- "#result\n",
- "print \"Burst error detected by CRC = \" , round(Ped*100,8), \"%\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Burst error detected by CRC = 99.99999998 %\n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 8.9, Page Number: 309"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "\n",
- "#variable declaration\n",
- "S = 8 #Reed-Solomon code with 1 byte\n",
- "n = (2**S-1) #length of coded sequence\n",
- "k = 239.0 #length of message sequence\n",
- "\n",
- "#calculation\n",
- "r = n-k #number of redundent bytes\n",
- "over_head = (r/k) #overhead %\n",
- "\n",
- "#result\n",
- "print \"Number of redundent bytes r = \" ,round(r),\"bytes\"\n",
- "print \"Percent overhead = \" , round(over_head*100) , \"%\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Number of redundent bytes r = 16.0 bytes\n",
- "Percent overhead = 7.0 %\n"
- ]
- }
- ],
- "prompt_number": 7
- }
- ],
- "metadata": {}
- }
- ]
-}
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