1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<h1> Chpater No 5: DIGTIAL BASEBAND TRANSMISSION<h1>"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 5.12, Page No 249 "
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Find The roll of factor alpha\n",
"\n",
"#initialisation of variables\n",
"datarate=0.1*10**6\n",
"fB=75000.0 #bandwidth\n",
"\n",
"#CALCULATIONS\n",
"Tb=1/datarate\n",
"alpha=2*fB*Tb-1\n",
"\n",
"#RESULTS\n",
"print('The roll out factor alpha = = %.1f ' %alpha)\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The roll out factor alpha = = 0.5 \n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 5.13, Page No 249"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#Find The Transmission bandwidth\n",
"\n",
"#initialisation of variables\n",
"q=128.0\n",
"alpha=0.2\n",
"n=math.log(q,2)\n",
"fm=2000.0\n",
"\n",
"#CALCULATIONS\n",
"Nq=2*fm\n",
"fs=1.25*Nq\n",
"N=8.0\n",
"total=N*fs\n",
"bitrate=7*total\n",
"fB=((1+alpha)*bitrate)/2\n",
"fB=fB/1000\n",
"#RESULTS\n",
"print('The minimum transmission Bandwidth required = %.f kHz' %fB)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The minimum transmission Bandwidth required = 168 kHz\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
