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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
}
|
