Fundamentals of Digital Television Transmission phần 10 doc

... R275 40.00 45.00 50.00 55.00 60.00 65.00 70.00 75.00 80.00 85.00 90.00 95.00 10 20 30 40 50 60 70 80 90 100 110 Filed strength (dBu) Distance (km) Calculated Measured Figure 8-34. Field strength versus distance. Fundamentals of Digital Television Transmission. ... 70, bandpass, 99, 116 band-reject, 100 channel, 73, 98, 99, 101 , 102 constant impedance, 99, 100 digital, 70,...

Ngày tải lên: 14/08/2014, 16:20

... originality for much of the material included in this book. In fact, the story of digital television builds on the many contributions of workers since the beginning of radio and television transmission. ... Services Digital Broadcasting (ISDB-T),” ITU Document 11A/Jxx-E, March 30, 1999. 3 The upper and lower channel edges occupy the bandwidth of the remaining OFDM segment....

Ngày tải lên: 14/08/2014, 16:20

... 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 parallel dipoles driven out of phase by ... sake of illustration, the results of calculation of the mutual impedance of parallel half-wavelength dipoles as a func- tion of separation are plotted in Figure 7-35. N...

Ngày tải lên: 14/08/2014, 16:20

... floor (dBm) 79.0 89.8 96.9 Minimum receiver power (dBm) 63.8 74.6 81.7 1 10 100 100 0 100 00 100 000 100 0000 10 100 100 0 Noise temperature (K) Frequency (MHz) Rural Suburban Figure 2-1. External ... effect of antenna noise temperature, T a , 6 Transmission Performance of ISDB-T,” ITU-R Document 11A/Jyy-E, May 14, 1999. 7 Yiyan Wu, “Performance Comparison of ATSC 8-VSB...

Ngày tải lên: 14/08/2014, 16:20

... performance of a space communications channel for three cases: with concatenated codes, trellis 10 −1 10 −2 10 −3 10 −4 10 −5 10 −6 (7, 1/2) code (Voyager) −2 10 1 2 3 4 5 6 7 8 9 101 1 Bit error ... 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 Tele...

Ngày tải lên: 14/08/2014, 16:20

... 0 .100 18 497 95.36 0 .101 19 503 94.66 0 .101 20 509 93.96 0 .102 21 515 93.28 0 .103 22 521 92.61 0 .104 23 527 91.96 0 .104 24 533 91.31 0 .105 25 539 90.68 0 .106 26 545 90.06 0 .107 27 551 89.44 0 .107 28 ... line length is 100 0 ft, AERP of 100 0 kW can be achieved with a gain of 30 up to U.S. channel 43. Alternatively, AERP of 100 0 kW may be supported with 8 3 16 -...

Ngày tải lên: 14/08/2014, 16:20

... 144 TRANSMISSION LINE FOR DIGITAL TELEVISION POWER RATING For all practical purposes, the average power rating of waveguide may be considered “unlimited” for digital television applications. ... independent of frequency. 15 This is above the TPO of all currently available digital television transmitters. Thus, waveguide may be selected on the basis of channel and desired...

Ngày tải lên: 14/08/2014, 16:20

... excitation of the upper and lower halves of SLOTTED CYLINDER ANTENNAS 181 f = 0° f=270° f=180° f=90° 10 5 D /l = .0637 f = 0° f=270° f=180° f=90° 10 5 D /l = .1 910 f = 0° f=270° f=180° f=90° 10 5 D /l ... an increasing number of slots around the cylinder. 158 TRANSMITTING ANTENNAS FOR DIGITAL TELEVISION Uniform end fed array −40 −30 −20 10 0 10 20 30 40 50 −6 −4 −2 0246...

Ngày tải lên: 14/08/2014, 16:20

... loss of about 16 dB. The overall roughness of R085 is approximately twice as great over much of the distance. The roughness of R 110 is intermediate to R085 and R215. The measured field for R 110 ... Summary of the Grand Alliance VSB Transmission System Field Test in Char- lotte, N.C., June 3, 1996, App. C. 240 RADIO-WAVE PROPAGATION −25 −20 −15 10 −5 0 5 10 20 30 40 50 60 70...

Ngày tải lên: 14/08/2014, 16:20

... 30 (10 6 ) psi and the cross-sectional area is 1.2 in. 2 Problem E3.1 3 ft 100 0 lb 100 0 lb 100 0 lb 100 0 lb1000 lb 500 lb 2 3 5 7 9 11 46 8101 2 1 3 ft 3 ft 3 ft 3 ft 3 ft 6 ft 500 lb Hutton: Fundamentals ... a number of submatrices of lower order. The concept of matrix partitioning is most useful in reducing the size of a system of equations and accounting for specified va...

Ngày tải lên: 08/08/2014, 17:20