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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h1> Chpater 9: ERROR CONTROL CODING<h1>"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Find detected errors,corrected errors\n",
"\n",
"#initialisation of variables\n",
"dmin=5.0\n",
"#(s+1)<= dmin number errors can be detected(s)\n",
" \n",
"#CALCULATIONS\n",
"s=dmin-1\n",
"\n",
"#RESULTS\n",
"print(' i)Number of detected errors s <= %.f ' %s)\n",
"#(2t+1)<=dmin number errors can be corrected(t)\n",
"t=(dmin-1)/2.0\n",
"print('ii) Number of corrected errors t<= %.f ' %t)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
" i)Number of detected errors s <= 4 \n",
"ii) Number of corrected errors t<= 2 \n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 9.17, Page No 569"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine all possible code vectors \n",
"\n",
"m3=1\n",
"m2=0\n",
"m1=1\n",
"m0=0\n",
"#M=Message Matrix\n",
"#G=Generator Matrix\n",
"G=[[1, 0, 1, 1, 0, 0, 0],[0, 1, 0, 1, 1, 0, 0],[0, 0, 1, 0, 1, 1, 0],[0, 0, 0, 1, 0, 1, 1]]\n",
"M=[[m3,m2,m1,m0]]\n",
"X = [[0, 0, 0, 0, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0]]\n",
"\n",
"for i in range(len(G)):\n",
" # iterate through columns of PXd\n",
" for j in range(len(M[0])):\n",
" # iterate through rows of PYX\n",
" for k in range(len(M)):\n",
" X[i][j] += G[i][k] * M[k][j]\n",
"print('The required code word')\n",
"for r in range(0,7):\n",
" print(X[0][r])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The required code word\n",
"1\n",
"0\n",
"1\n",
"0\n",
"0\n",
"0\n",
"0\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 9.19, Page No 572"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Determine code word \n",
"m3=1\n",
"m2=0\n",
"m1=1\n",
"m0=0\n",
"#M=Message Matrix\n",
"#G=Generator Matrix\n",
"G=[[1, 0, 0, 0, 1, 0, 1],[0, 1, 0, 0, 1, 1, 1],[0, 0, 1, 0, 1, 1, 0],[0, 0, 0, 1, 0, 1, 1]]\n",
"M=[[m3,m2,m1,m0]]\n",
"X = [[0, 0, 0, 0, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0],[0, 0, 0, 0, 0, 0, 0]]\n",
"\n",
"\n",
"for i in range(len(G)):\n",
" # iterate through columns of PXd\n",
" for j in range(len(M[0])):\n",
" # iterate through rows of PYX\n",
" for k in range(len(M)):\n",
" X[i][j] += G[i][k] * M[k][j]\n",
"print('The required code word')\n",
"for r in range(0,7):\n",
" print(X[0][r] )\n",
" \n",
"\n",
"print('The code in the book is wrong')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The required code word\n",
"1\n",
"0\n",
"1\n",
"0\n",
"0\n",
"0\n",
"0\n",
"The code in the book is wrong\n"
]
}
],
"prompt_number": 7
}
],
"metadata": {}
}
]
}
|
