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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 14/08/2014, 16:20

... 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,...

Ngày tải lên: 14/08/2014, 16:20

... 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...

Ngày tải lên: 22/07/2014, 09:20