Fundamentals of Digital Television Transmission phần 6 potx

... 0.032 3 63 411.75 0.034 4 69 391.05 0.0 36 5 79 362 .00 0.039 6 85 347.11 0.041 7 177 225 .69 0. 063 8 183 221.22 0. 064 9 189 2 16. 96 0. 065 10 195 212.91 0. 066 11 201 209.05 0. 068 12 207 205. 36 0. 069 13 ... 0.0 46 36 605 44.71 0.181 3 63 163 .98 0.049 37 61 1 44.44 0.182 4 69 1 56. 03 0.051 38 61 7 44.18 0.183 5 79 144.88 0.055 39 62 3 43.92 0.184 6 85 139.15 0.05...

Ngày tải lên: 14/08/2014, 16:20

... delay = 200 ns −100.000 0.000 100.000 200.000 300.000 400.000 500.000 54.000 56. 000 58.000 60 .000 62 .000 64 .000 66 .000 68 .000 Phase shift (deg); GD (ns) Frequency (MHz) Phase shift (deg) Group delay ... and R300 had tap energy for channel 6 of  16 dB or greater on only 6% of locations; the roughest radial, R305, had tap energy at or above this level at 18% of sites. Howe...

Ngày tải lên: 14/08/2014, 16:20

... 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 1 06. 03 212. 06 transmission mode and the length of the guard interval. These relationships ... equipment manufacturer. 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

... used 8 Field Test Results of the Grand Alliance HDTV Transmission System, Association of Maximum Service Television, Inc., September 16, 1994. 26 PERFORMANCE OBJECTIVES FOR DIGITAL TELEVISION TABLE 2-3. ... 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 16 QAM are assumed, yielding a threshold C/N of 13.9 dB needed to achieve...

Ngày tải lên: 14/08/2014, 16:20

... Bhargava, op. cit., pp. 4–7, 61 . 68 TRANSMITTERS FOR DIGITAL TELEVISION technology, several of these functions may be implemented in digital circuitry. The possibility of performing the modulation ... systems support a wide range of payload bit rates. The average transmitter power is much less than that required for analog TV transmission. Fundamentals of Digital Televi...

Ngày tải lên: 14/08/2014, 16:20

... 88.94 0.085 47 67 1 46. 01 0. 166 14 473 56. 48 0.134 48 67 7 45. 76 0. 167 15 479 56. 06 0.135 49 68 3 45.52 0. 167 16 485 55 .66 0.1 36 50 68 9 45.29 0. 168 17 491 55. 26 0.137 51 69 5 45. 06 0. 169 18 497 54.87 ... 64 7 66 .44 0.130 19 503 77.53 0.111 44 65 3 66 . 06 0.130 20 509 76. 97 0.112 45 65 9 65 .69 0.131 21 515 76. 43 0.112 46 665 65 .32 0.132 22 521 75....

Ngày tải lên: 14/08/2014, 16:20

... free of phase changes unless the aperture amplitude taper is greater than a minimum 162 TRANSMITTING ANTENNAS FOR DIGITAL TELEVISION 0.0 0.1 0.2 0.3 0.4 0.5 0 .6 0.7 0.8 0.9 1.0 6 −4 −202 468 10 Relative ... directional properties. 6 Balanis, op. cit., p. 275. 168 TRANSMITTING ANTENNAS FOR DIGITAL TELEVISION Exponential array 0.0 0.1 0.2 0.3 0.4 0.5 0 .6 0.7 0.8 0.9 1.0 1.1...

Ngày tải lên: 14/08/2014, 16:20

... convenience of calculations, include the effects of variations in the response of the antennas with respect to angle or polarization 4 Jordan, op. cit., pp. 64 7 65 0. 1 86 TRANSMITTING ANTENNAS FOR DIGITAL ... factor. Modification of the radiation resistance of a dipole in the presence of a ground plane is equivalent to the effect of the mutual impedance of a pair of par...

Ngày tải lên: 14/08/2014, 16:20

... 87, 2 46, 250 FDM, 56 quadrature, 12, 15, 43, 52 QAM, 12, 13, 16, 24, 63 , 65 , 66 QPSK, 12, 16, 63 , 65 , 66 SSB-SC, 54 MPEG, 4, 7, 11, 14, 18, 19 Multipath, 2, 4, 11, 22, 33, 43, 58, 59, 61 , 65 , 152 Noise, ... 59, 64 LDMOS, 78 LO, 9 MTBF, 83 Modulation and keying: BST-OFDM, 14 COFDM, 11, 15, 24, 37, 43, 52, 56, 58, 59, 61 , 62 , 64 , 77 DQPSK, 16, 63 8 VSB, 4, 6, 10, 28...

Ngày tải lên: 14/08/2014, 16:20

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