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{
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"name": "",
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"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"CHAPTER 7 - Cellular System Design Tradeoffs"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 7.7 - PG NO.195"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no.195\n",
"Nmacro=7.\n",
"Nchmacro=16.\n",
"C1=Nmacro*Nchmacro#channel capacity \n",
"\n",
"Nminpmac=4.\n",
"C2=Nmacro*Nchmacro*Nminpmac\n",
"\n",
"Nmicpmin=4.\n",
"C3=Nmacro*Nchmacro*Nminpmac*Nmicpmin\n",
"\n",
"print '%s %d %s' %('channel capacity of macrocell system is =',C1,'channels')\n",
"print '%s %d %s' %('channel capacity of minicell system is =',C2,'channels')\n",
"print '%s %d %s' %('channel capacity of minicell system is =',C3,'channels')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"channel capacity of macrocell system is = 112 channels\n",
"channel capacity of minicell system is = 448 channels\n",
"channel capacity of minicell system is = 1792 channels\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 7.8 - PG NO.195"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no.195\n",
"r0=2.*10.**3.\n",
"r1=1.*10.**3.\n",
"nl=4.#no. of large cells\n",
"ns=(r0/r1)**2.*nl-1.#split cells within area=split cells within square-1\n",
"ncpl=120.\n",
"n2=nl*ncpl#no. of channels without cell splitting\n",
"ncps=120.\n",
"n1=ns*ncps#no. of channels with cell splitting\n",
"inc=n1/n2#increase in the number of cells\n",
"print'%s %.2f %s' %('increase in the number of cells is =',inc,'times')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"increase in the number of cells is = 3.75 times\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 7.10 - PG NO.220"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no. 220\n",
"k=184.#information bits\n",
"n=224.#encoded bits\n",
"print'%s %.f %s' %('number of parity check bits is =',n-k,'bits')\n",
"r=k/n#code rate\n",
"print'%s %.2f' %('the code rate of block encoder is =',r)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"number of parity check bits is = 40 bits\n",
"the code rate of block encoder is = 0.82\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"EXAMPLE 7.11 - PG NO.227"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#page no. 227\n",
"nip=228.\n",
"nop=456.\n",
"cr=nop/nip\n",
"ntdma=8.#no.of TDMA blocks\n",
"nebptd=nop/ntdma#no. of bits/tdma frame\n",
"print'%s %d' %('Number of encoded data bits in each TDMA frame is =',nebptd)\n",
"ttdma=4.6*10**-3.#1 TDMA frame duration\n",
"tttdma=ntdma*ttdma\n",
"print'%s %.1f %s' %('Delay in reconstructing the codewords to the reception of 8 TDMA frames is =',tttdma*10**3,'ms')\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Number of encoded data bits in each TDMA frame is = 57\n",
"Delay in reconstructing the codewords to the reception of 8 TDMA frames is = 36.8 ms\n"
]
}
],
"prompt_number": 4
}
],
"metadata": {}
}
]
}
|
