Fundamentals of Digital Television Transmission phần 3 pot
Fundamentals of Digital Television Transmission phần 3 pot
... CODING AND MODULATION FOR DIGITAL TELEVISION
−0.4
−0.2
0.0
0.2
0.4
0.6
0.8
1.0
3. 78 3. 79 3. 80 3. 81 3. 82
Relative voltage
Relative frequency (MHz)
DVB-T 2k system
Figure 3- 8. COFDM subchannel spectra.
−50.00
−45.00
−40.00
35 .00
30 .00
−25.00
−20.00
−15.00
−10.00
−5.00
0.00
3. 75 ... spectra.
−50.00
−45.00
−40.00
35 .00
30 .00
−25.00
−20.00
−15.00
−10.00
−5.00
0.00
3. 75...
Fundamentals of Digital Television Transmission phần 5 pot
... 7 13 44 .38 0.172
21 515 53. 75 0.141
55 719 44.16 0.1 73
22 521 53. 38 0.142
56 725 43. 94 0.174
23 527 53. 03 0.1 43
57 731 43. 73 0.174
24 533 52.68 0.144
58 737 43. 51 0.175
25 539 52 .34 0.145
59 7 43 ... 0.061
33 587 70.55 0.122
9 189 138 .19 0.062
34 5 93 70.11 0.1 23
10 195 135 . 73 0.0 63
35 599 69.67 0.1 23
11 201 133 .39 0.064
36 605 69.25 0.124
12 207 131 .15 0.065...
Fundamentals of Digital Television Transmission phần 6 potx
... 38 . 83 0.209
29 5 63 46.72 0.1 73
63 767 38 .64 0.210
30 569 46.42 0.174
64 7 73 38.45 0.211
31 575 46.12 0.175
65 779 38 .27 0.212
32 581 45. 83 0.176
66 785 38 .09 0.2 13
33 587 45.54 0.177
67 791 37 .91 ... 0. 134
23 527 78.27 0. 135
24 533 77.71 0. 136
25 539 77.16 0. 137
26 545 76.62 0. 138
27 551 76.08 0. 139
28 557 75.56 0.140
29 5 63 75.05 0.141
30 569 74.54...
Fundamentals of Digital Television Transmission phần 7 pot
... Eng.,
December 1955, pp. 31 6 32 3.
174 TRANSMITTING ANTENNAS FOR DIGITAL TELEVISION
Array diameter = 0.5 wavelength
0.0
0.1
0.2
0 .3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 50 100 150 200 250 30 0 35 0 400
Relative ... shown in Figure 7 -3. The first null is filled to a level of
22%; the second, to a level of 9%. Common amounts of first null fill range from
5 to 35 %. Unlike beam tilt, incl...
Fundamentals of Digital Television Transmission phần 9 potx
... R305 and R 338 with a magnitude of about 14 dB and
delays of 9.5 and 13. 7
µs, respectively. An echo from the Amoco Building was
clearly seen on R251 and R 338 with similar magnitude and delay of ... cit., p. 434 ; Anderson, op. cit., pp. 31 0 31 1.
14
FCC Rules, Part 73, 73. 684(i).
238 RADIO-WAVE PROPAGATION
Raleigh, Ch 32
30 .00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
110.00...
Fundamentals of Digital Television Transmission phần 1 doc
... equipment
manufacturer.
Fundamentals of Digital Television Transmission. Gerald W. Collins, PE
Copyright
2001 John Wiley & Sons, Inc.
ISBNs: 0-471 -39 199-9 (Hardback); 0-471-2 137 6-4 (Electronic)
1
DIGITAL TELEVISION
TRANSMISSION ... Ratio
Mode
Guard Interval
Ratio 1 2 3
1
4
64.26 128.52 257.04
1
8
57. 83 115.67 231 .34
1
16
54.62 109.24 218.46
1
32
53. 01 106. 0...
Fundamentals of Digital Television Transmission phần 2 pptx
... C/N (dB) 13. 9 13. 9 13. 9 13. 9
Threshold power at antenna, P
ma
(dBm) 88 .3 91 .3 93. 3 93. 3
Threshold power at receiver, P
mr
(dBm) 86 .3 86 .3 86 .3 86 .3
a
7
8
inner code rate, /T
u
of
1
8
and ... value
of the transmitted symbols.
Fundamentals of Digital Television Transmission. Gerald W. Collins, PE
Copyright
2001 John Wiley & Sons, Inc.
ISBNs: 0-471...
Fundamentals of Digital Television Transmission phần 8 docx
... normally
appears to be about 33 % greater than actual. This is referred to as a
4
3
earth
model.
For an effective earth radius of 4(6250) /3 or 833 0 m, the distance to the radio
horizon from a 30 0-m tower and ... IRE,
Vol. 23, No. 12, December 1 935 , p. 1509.
7
B. Trevor and P.S. Carter, “Propagation of Waves,” Proc. IRE, Vol. 21, No. 3, March 1 933 , p. 1509.
188 TRANSMITTING AN...
Fundamentals of Digital Television Transmission phần 10 doc
... 64, 77
DQPSK, 16, 63
8 VSB, 4, 6, 10, 28 31 , 33 , 34 , 37 , 38 , 43,
51– 53, 56, 77, 87, 246, 250
FDM, 56
quadrature, 12, 15, 43, 52
QAM, 12, 13, 16, 24, 63, 65, 66
QPSK, 12, 16, 63, 65, 66
SSB-SC, ... 75, 78, 80, 83, 84, 87, 89, 90
performance, 30 , 36 , 73, 74, 77, 78, 88, 93
requirements, 36
retrofit of, 94, 95
solid state, 73, 75, 76–79, 83, 87, 89–94
testing, 1 13, 249
tube,...
Bài giảng điều khiển số (Digital Control Systems) - Phần 3 pot
... Prof. Hon Prof. Dr Ing. habil. Ng. Ph. Quang
Electrical Engineering - Automatic Control
65
3. ĐK có phảnhồitrạng thái
3. 3 Tính điều khiển đượcvàtínhquansátđược
3. 3.1 Tính điềukhiển được
3. 3.2 ... có:
16 June 2007 Assoc. Prof. Hon Prof. Dr Ing. habil. Ng. Ph. Quang
Electrical Engineering - Automatic Control
63
3. ĐK có phảnhồitrạng thái
3. 1 Ôn lạicáckiếnthứccơ sở
3. 1 .3 Các cấu...
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