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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 7 Communication Techniques"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.6 Page no 304"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"Q=60\n",
"IF=455*10**3\n",
"x=680.0*10**3\n",
"\n",
"#calculation\n",
"import math\n",
"imf=x+2*(IF) #image frequency\n",
"a=(imf/x)\n",
"b=(x/imf)\n",
"c=(Q*(a-b))\n",
"d=20*math.log10(c)\n",
"\n",
"#result\n",
"print\"The image frequency is \",imf,\"Hz\"\n",
"print\"image rejection = \",round(d,3),\"dB\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The image frequency is 1590000.0 Hz\n",
"image rejection = 41.186 dB\n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.7 Page no 314"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"NF=20.0\n",
"df=10**6\n",
"\n",
"#calculation\n",
"x=10*math.log10(df)\n",
"S=-174+NF+x\n",
"a=5 #input intercept\n",
"dr=2/3.0*(a-S)\n",
"\n",
"#result\n",
"print\"S= \",S,\"dB\"\n",
"print\"dynamic range= \",dr,\"dB\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"S= -94.0 dB\n",
"dynamic range= 66.0 dB\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.8 Page no 315"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"nf=5.0\n",
"x=24.0\n",
"y=20.0\n",
"\n",
"#calculation\n",
"import math\n",
"NR0=10**(nf/10.0)\n",
"NR1=10**(y/10.0)\n",
"PG1=10**(x/10.0)\n",
"NR=NR0+((NR1-1)/PG1)\n",
"NF=10*math.log10(NR)\n",
"S=-174+NF+60\n",
"a=nf-x #the system's third-order intercept point \n",
"dr=2/3.0*(a-S)\n",
"\n",
"#result\n",
"print\"NR1 = \",round(NR0,3)\n",
"print\"NR2 = \",NR1\n",
"print\"PG1= = \",round(PG1,3)\n",
"print\"NR = \",round(NR,3),\"dB\"\n",
"print\"NF = \",round(NF,3),\"dB\" #total system noise figure\n",
"print\"S = \",round(S,3),\"dBm\" #sensitivity\n",
"print\"the systems third-order intercept point is\",a,\"dB\"\n",
"print\"dynamic range = \",round(dr,1),\"dB\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"NR1 = 3.162\n",
"NR2 = 100.0\n",
"PG1= = 251.189\n",
"NR = 3.556 dB\n",
"NF = 5.51 dB\n",
"S = -108.49 dBm\n",
"the systems third-order intercept point is -19.0 dB\n",
"dynamic range = 59.7 dB\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.9 Page no 315"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"x=24\n",
"nf=-5\n",
"NR = 3.16+(99/10.0)\n",
"\n",
"#calculation\n",
"import math\n",
"NF = 10*math.log10(NR)\n",
"S=-174+NF+60\n",
"dr = 2/3.0*(nf-S)\n",
"\n",
"#result\n",
"print\"NR = \",NR #noise ratio\n",
"print\"NF = \",round(NF,3),\"dB\" #noise figure\n",
"print\"S = \",round(S,3),\"dBm\" #sensitivity\n",
"print\"dynamic range = \",round(dr,3),\"dB\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"NR = 13.06\n",
"NF = 11.159 dB\n",
"S = -102.841 dBm\n",
"dynamic range = 65.227 dB\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 7.10 Page no 329"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"x=0.40*100*10**6\n",
"y=(100*10**6/(2.0**32))\n",
"#fCLK is reference oscillator\n",
"\n",
"#result\n",
"print\"The maximum output frequency is approximately 40 percent of fCLK MAX\",x,\"Hz\"\n",
"print\"The frequency resolution is given by \",round(y,3),\"Hz\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The maximum output frequency is approximately 40 percent of fCLK MAX 40000000.0 Hz\n",
"The frequency resolution is given by 0.023 Hz\n"
]
}
],
"prompt_number": 10
}
],
"metadata": {}
}
]
}
|
