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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "<h1> Chpater 6: DIGITAL MODULATION TECHNIQUES<h1>"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 6.5, Page No 327"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math \n",
+      "#Symbol rate of transmission and bandwidth \n",
+      "\n",
+      "#initialisation of variables\n",
+      "fb=1.0                #MHz\n",
+      "Tb=1/fb               #bit period ms\n",
+      "N=4\n",
+      "\n",
+      "#CALCULATIONS\n",
+      "Ts1=Tb\n",
+      "Bw1=2*fb\n",
+      "Ts2=Tb*2\n",
+      "Tr2=(1.0/2)*1000          #Symbols/sec\n",
+      "Bw2=1/Tb\n",
+      "Ts3=N*Tb\n",
+      "Tr3=(1.0/4)*1000\n",
+      "Bw3=(2.0*fb)/N\n",
+      "\n",
+      "#RESULTS\n",
+      "print(\"In BPSK\")\n",
+      "print(\"The symbol rate of transmission is = %.f X 10^6 symbol/sec \" %Ts1)\n",
+      "print(\"The Bandwidth is = %.f MHz \" %Bw1)\n",
+      "print(\"In QPSK\")\n",
+      "print(\"The symbol rate of transmission is = %.f X 10^3 symbol/sec \" %Tr2)\n",
+      "print(\"The Bandwidth is = %.f MHz \" %Bw2)\n",
+      "print(\"In 16-ary PSK\")\n",
+      "print(\"The symbol rate of transmission is = %.f X 10^3 symbol/sec \" %Tr3)\n",
+      "print(\"The Bandwidth is = %.f kHz \" %(Bw3*1000))\n",
+      "\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "In BPSK\n",
+        "The symbol rate of transmission is = 1 X 10^6 symbol/sec \n",
+        "The Bandwidth is = 2 MHz \n",
+        "In QPSK\n",
+        "The symbol rate of transmission is = 500 X 10^3 symbol/sec \n",
+        "The Bandwidth is = 1 MHz \n",
+        "In 16-ary PSK\n",
+        "The symbol rate of transmission is = 250 X 10^3 symbol/sec \n",
+        "The Bandwidth is = 500 kHz \n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 6.6, Page No 328"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "#initialisation of variables\n",
+      "fb=90              #MHz\n",
+      "Bw=20              #Mb/s\n",
+      "\n",
+      "#CALCULATIONS\n",
+      "N=(2*fb)/Bw\n",
+      "\n",
+      "#RESULTS\n",
+      "print(\"Number of bits required = %.f \" %N)\n",
+      "\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Number of bits required = 9 \n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 6.12, Page No 357"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "#initialisation of variables\n",
+      "Tb=0.1          #msec\n",
+      "\n",
+      "#CALCULATIONS\n",
+      "fb=1/Tb\n",
+      "\n",
+      "#RESULTS\n",
+      "print(\"Transmission bandwidth = %.f kHz\" %fb)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Transmission bandwidth = 10 kHz\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file