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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter19 Satellite Communications"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 19.14.1,Pg.no.737"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The carrier to noise ratio in dB is 93.88\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#given\n",
+    "P_HPA=600.0\n",
+    "TFL_dB=1.5\n",
+    "G_dB_ES=50.0\n",
+    "RFL_dB=1\n",
+    "GTR_dB_SAT =-8\n",
+    "FSL_dB=200\n",
+    "AML_dB=0.5\n",
+    "PL_dB=0.5\n",
+    "AA_dB=1\n",
+    "#Determination of carrier to noise ratio\n",
+    "P_dB_HPA=10*math.log10(P_HPA/1)\n",
+    "EIRP_dB=P_dB_HPA -TFL_dB+G_dB_ES\n",
+    "TPL_dB=FSL_dB+AML_dB+PL_dB+AA_dB\n",
+    "CNoR_dB=EIRP_dB -TPL_dB -RFL_dB+GTR_dB_SAT+228.6\n",
+    "CNoR_dB=round(CNoR_dB,2)\n",
+    "print 'The carrier to noise ratio in dB is',CNoR_dB"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 19.14.2,Pg.no.739"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The carrier to noise ratio is 78.23\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "from math import pi\n",
+    "f=14*10**9\n",
+    "BO_dB=10\n",
+    "GTR_dB_SAT=3\n",
+    "RFL_dB=1\n",
+    "phi_dB=-98\n",
+    "c=3*10**8\n",
+    "#Determination of carrier to noise ratio\n",
+    "wav=c/f\n",
+    "x=0.00003654067   #x=((wav**2)/(4*pi))\n",
+    "Ao_dB=10*math.log10(x)\n",
+    "CNo_dB=phi_dB -BO_dB+GTR_dB_SAT -RFL_dB+Ao_dB+228.6\n",
+    "CNo_dB=round(CNo_dB,2)\n",
+    "print 'The carrier to noise ratio is',CNo_dB"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 19.16.1,Pg.no.741"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The overall carrier to noise ratio is 79.59\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "CNo_dB_U=88\n",
+    "CNo_dB_D=78\n",
+    "NoC_U=10**(-CNo_dB_U/10)\n",
+    "NoC_D=10**(-CNo_dB_D/10)\n",
+    "NoC=NoC_U+NoC_D\n",
+    "CNo_dB=10*math.log10(1/NoC)\n",
+    "CNo_dB=round(CNo_dB,2)\n",
+    "print 'The overall carrier to noise ratio is',CNo_dB"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 19.17.1,Pg.no.742"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The ratio C/No is 71.49\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "#given\n",
+    "Eb_N0=9.6           #ratio expessed in dB\n",
+    "Rb=1.544*10**6      #bit rate expessed in bps\n",
+    "#The bit rate in dB relative to 1bps is\n",
+    "R_dB_b=10*math.log10(Rb)\n",
+    "#The required CN0 ratio is\n",
+    "CNo_db=Eb_N0+R_dB_b\n",
+    "CNo_db=round(CNo_db,2)\n",
+    "print 'The ratio C/No is',CNo_db "
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}