Design and Construction of a Liquid-Cooled Solid-State Digital Television Transmitter

With the advent of terrestrial digital broadcasting, new and improved digital transmitter technologies are required since existing analog transmitter technology is, for the most part, unable to adequately transmit a decodable digital television signal. This study focuses on the design and construction of a solid-state, liquid-cooled UHF digital television transmitter. Emphasis is placed on the design of the amplifier module including the amplifier card, Wilkinson splitter and combiner, input and output matching circuits, DC bias network and the system mask filter. The results of this research are also presented for two television transmitters that are installed and continue to be in use today, including analyses of specific failures that have occurred while in the field. The overall objective of this study is not only to document the research that is behind the design of this system, but also to document the construction of the transmitter for reference in system maintenance and repair as well as a basis for future design

Design and Construction of a Liquid-Cooled Solid-State Digital Television Transmitter

With the advent of terrestrial digital broadcasting, new and improved digital transmitter technologies are required since existing analog transmitter technology is, for the most part, unable to adequately transmit a decodable digital television signal. This study focuses on the design and construction of a solid-state, liquid-cooled UHF digital television transmitter. Emphasis is placed on the design of the amplifier module including the amplifier card, Wilkinson splitter and combiner, input and output matching circuits, DC bias network and the system mask filter. The results of this research are also presented for two television transmitters that are installed and continue to be in use today, including analyses of specific failures that have occurred while in the field. The overall objective of this study is not only to document the research that is behind the design of this system, but also to document the construction of the transmitter for reference in system maintenance and repair as well as a basis for future design

8-vsb Channel Coding Analysis For Dtv Broadcast

This article analyzes channel coding and equalization stages in the 8-level Vestigial Sideband transmission for the Digital Television broadcast system developed by ATSC, the Advanced Television Systems Committee. We present bit error rate versus C/N performance for a simulator developed by the authors for the purpose of assessing the robustness of the ATSC 8-VSB coding and equalization stages in the presence of multipath propagation, additive Gaussian noise and of channel impulsive noise surges. Implementation aspects for the developed simulator are discussed.463539547ATSC Digital Television StandardGuide to the Use of the ATSC Digital Television StandardMPEG-2 SystemsMPEG-2 VideoUn, S., Costello Jr., D.J., (1983) Error Control Coding, , Prentice-Hall, Englewood CliffClark Jr., G.C., Cain, J.B., (1988) Error-Correction Coding for Digital Communications, , Plenum PressPeterson, W.W., Weldon Jr., E.J., (1990) Error-Correcting Codes, , MIT PressUngerboeck, G., Channel coding with multilevel/phase signals (1982) IEEE Transactions on Information Theory, pp. 55-67. , vol. IT-28, No. 1, January(1996) Using MMX Instructions to Implement Viterbi Decoding, , INTEL(1995) Error Control Systems for Digital Communication and Storage, , Prentice-Hall(1995) Digital Modulation and Coding Prentice-HallSgrignoli, G., ATSC Transmission System: VSB Tutorial, , http://www.zenith.com/main/cool/tech/vsbtutor/vsbtutor.htm, Zenith Electronics CorporationMichelson, A.M., Levesque, A.H., (1985) Error Control Techniques for Digital Communication, , Wiley & SonsOdenwalder, J.P., (1976) Error Control Coding Handbook (Final Report), , Linkabit Corp. report for USAFCasas, R.A., Schniter, P.B., Balakrishnan, J., Johnson Jr., C.R., (1998) DFE Tutorial Cornell Univ. Blind Equalization Research Group, , JulyBalakrishnan, J., (1999) Mitigation of Error Propagation in Decision Feedback Equalization, , M.Sc. Thesis, Cornell University, AugustSET/ABERT Digital TV Tests in Brazil Final Report, , May 200

Design,simulation And Hardware Implementation Of A Digital Television System: Synchronization Techniques

As described in [1], in 2005 the Brazilian government supported many research consortia in order to develop a Digital Television System employing advanced technologies for multimedia broadcasting. One of the proposals for the physical layer of this system was entitled Innovative Modulation for the Brazilian Digital TV System (MI-SBTVD). The MI-SBTVD Project includes high performance error-correcting codes, transmit spatial diversity and multi-carrier modulation. The objective of this article is to present the synchronization techniques that were used in the first proof-of-concept for the MI-SBTVD System. We present the simulated performance results for both the AWGN and multipath channels. Finally, we also comment on the implementation details of the synchronization scheme using Field Programmable Gate Array (FPGA) devices. © 2006 IEEE.208212Brito, J.M.C., Design, Simulation and Hardware Implementation of a Digital Television System: System Overview (2006) The 9th International Symposium on Spread Spectrum Techniques and Applications - ISSSTA-2006, , Manaus, BrazilATSC Standard A/53, ASTC Digital Television StandardDigital Video Broadcasting (DVB)Framing structure, channel coding and modulation for digital terrestrial television (2001), 300 (744), pp. V1.4.1. , European Broadcasting Union, ETSI ENInternational Telecommunication Union, Channel Coding, Frame Structure and Modulation Scheme for Terrestrial Integrated Services Digital Broadcasting (ISDB-T), ITU-R 205/11, 1999Castro, F.C.C., Castro, M.C.F., Fernandes, M.A.C., Arantes, D.S., 8-VSB Channel Coding Analysis for DTV Broadcast (2000) IEEE Transactions Consumer Eletronics, 46 (3), pp. 539-547. , AugustK. Welling and M. Rice, Coded Orthogonal Frequency Division Multiplexing for the Multipath Fading Channel, In Proceedings of the International Telemetering Conference, Las Vegas, NV, October 1999Allamouti, S., A simple transmit diversity technique for wireless communications (1998) IEEE J. Select. Areas Comm, 16 (8), pp. 1451-1458Lee, K.F., Willians, D.B., A Space-Time Coded Transmit Diversity Technique for Frequency Selective Fading Channels (2000) IEEE Sensor Array and Multichannel Signal Processing Workshop, pp. 149-152. , Cambridge, MA, MarchHara, S., Prasad, R., (2003) Multicarrier Techniques for 4G Mobile Communications, , Artech HouseFazel, K., Kaiser, S., (2003) Multi-carrier and Spread Spectrum Systems, , WileyDaffara, F., Chouly, A., Maximum likelihood frequency detectors for orthogonal multi-carrier systems (1993) Proc. IEEE International Conference on Communications (ICC'93), pp. 766-771. , Geneva, Switzerland, pp, MayDaffara, F., Adami, O., A new frequency detector for orthogonal multi-carrier transmission techniques (1995) Proc. IEEE Vehicular Technology Conference, pp. 804-809. , Chicago, USA, pp, Julyvan de Beek, J.J., Sandell, M., Borjesson, P.O., ML estimation of time and frequency offset in OFDM systems, in (1997) IEEE Transactions on Signal Processing, 45 (7), pp. 1800-1805. , JulyFazel, K., Kaiser, S., Robertson, P., OFDM: A key component for terrestrial broadcasting and cellular mobile radio (1996) Proc. International Conference on Telecommunication (ICT'96), pp. 576-583. , Istanbul, Turkey, pp, AprilFazel, K., Kaiser, S., Robertson, P., Ruf, M.J., A concept of digital terrestrial television broadcasting (1995) Wireless Personal Communications, 2 (1 2), pp. 9-27Moose, P.H., A technique for orthogonal frequency division multiplexing frequency offset correction (1994) Transactions on Communications, 42, pp. 2908-2914. , OctBaoguo Yang, K.B., Letaief, R.S., Cheng, Z.C., Timing recovery for OFDM transmission, in (2000) IEEE Journal on Selected Areas in Communications, 18 (11), pp. 2278-2291. , NovVirtex-4, Dual 105MSPS ADC, Dual 160MSPS DAC DIME-II Module User Guide (2005) Reference Manual, , Nallatech, IncVirtex-4 User Guide (2006) Reference Manual, , Xilinx Inc, Marc