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Dissertations / Theses on the topic 'Digital Audio Broadcasting (DAB)'
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1
Moreno, Martinez Eduardo. "Implementation of Digital Audio Broadcasting System based in SystemC Library." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2411.
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<p>This thesis describes the design and implementation of a Digital Audio Broadcasting (DAB) System developed using C++ Language and SystemC libraries. The main aspects covered within this report are the data structure of DAB system, and some interesting points of SystemC Library very useful for the implementation of the final system. </p><p>It starts with a introduction of DAB system and his principals advantages. Next it goes further into the definition of data structures of DAB, they are FIC, MSC, and DAB audio frame, explained with MPEG and PAD packets. Later on this chapter there is an explanation of the SystemC library with special attention on the features that I used to implement the system. This features are the events used in the communication between processes and the interfaces needed for sending and receiving the data.</p><p>With all these points covered is quite easy for a reader to understand the implementation of the system, despite this point is covered in the last chapter of the thesis. The implementation is here explained in two different steps. The first one explain how is formed the DAB audio frame by means of MPEG frames that are wrote in channel by producer interface, this frames are readed by consumer interface. For this purpose I have created some classes and structures that are explained in this part. The second part explain how I obtain the DAB transmission frame which is obtained creating MSC frames, that are big data structures formed by groups of DAB audio frames, therefore there are some functions that act like a buffer and add audio frames to the MSC data structure. Of independent way there is the FIC frame that is generated of random way and its added to the transmission frame.</p>
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Ernest, Petro Pesha. "DAB implementation in SDR." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2943.
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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.<br>The aim of this thesis is to implement a Digital Audio Broadcasting (DAB) system in a Software
Defined Radio (SDR). The physical modulation part of the DAB transmitter for one of the
transmission modes as well as its receiver is to be implemented and tested in the SDR. DAB
transmission mode II is implemented.
3
Devlin, John P. "The relationship between the BBC and the commercial radio sector in promoting DAB (Digital Audio Broadcasting) in the United Kingdom." Thesis, Bournemouth University, 2016. http://eprints.bournemouth.ac.uk/25359/.
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The place of Digital Audio Broadcasting (DAB) in the UK provides an interesting area of study. As of 2015, it is a platform which has been in existence for twenty years. During that time its position has been nebulous. It represents only one method of listening to radio output in a digital format but one in which the BBC, and latterly, the commercial radio sector, placed a huge degree of trust. It has however not become the standard mode of radio listening. One can argue that after much proactive effort from within the UK radio industry, its position may be beginning to falter somewhat in the commercial sector while remaining a paramount policy objective for the BBC. The aim of this thesis is to account for the emergence of DAB and its impact on the relationship between the BBC and the commercial radio sector. It examines the separate and joint roles of each in promoting DAB and highlights how this led to a unique period of cooperation between the two. A historical backdrop is necessary in order to establish the previous state of relations, before embarking upon the core of the thesis which argues that both parties adopted significant changes of posture in order to promote DAB. I argue that the implementation of DAB as a new radio technology represents a marked period of institutional change within the UK radio industry. In playing distinct, separate roles, I show how this reveals a maturity within the industry whereby the BBC and the commercial sector reached a point of equality. In promoting a joint role, based on a policy of overt cooperation, I demonstrate how this represented a major shift in the historical relationship between both parties. Relying on a small canon of secondary sources and an extensive survey of primary source documentation, as well as interviews with some of the key players in DAB and the UK radio industry as a whole, this thesis provides a study of a significant period in British radio history which witnessed the development of a nascent radio platform, coupled with a significant change in the dynamic of existing relationships within the industry. In doing so, it delivers a wider historical interpretation of a particular point in radio history and marks a critical phase when the very nature of the industry changed.
4
Palmer, Duncan. "Position estimation using the Digital Audio Broadcast (DAB) signal." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12456/.
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Over the past decades, there have been a number of trends that have driven the desire to improve the ability to navigate in all environments. While the Global Positioning System has been the driving factor behind most of these trends, there are limitations to this system that have become more evident over time as the world has increasingly come to rely on navigation. These limitations are mostly due to the low transmission power of the satellites, where navigation signals broadcast from space are comparatively weak, especially by the time they have travelled to receivers on the ground. This makes the signals particularly vulnerable to fading in difficult environments such as "urban jungles" and other built up areas. The low signal-to-noise ratio (SNR) also means, that the signals are susceptible to jamming, both hostile and accidental. This motivates the need for alternatives technologies to satellite navigation and consider terrestrial based alternatives such as LORAN-C and eLORAN, but there is also significant interest in the exploitation of other non-navigation signals for positioning and navigation purposes. These so-called 'Signals of Opportunity' do not generally require any alterations to existing communications transmission infrastructure and utilise alternative multi-carrier modulation techniques to those used by navigation systems. This project examines the use of such a signal, the Digital Audio Broadcast (DAB) signal, as a positioning source. This thesis contains complete research from initial coverage simulations in the UK, through to extensive static testing, and the use of the signal in a dynamic environment and it has been shown that the Digital Audio Broadcast signal has potential as a terrestrial based positioning signal.
5
Ligeti, Agnes. "Coverage optimization in digital audio broadcasting network." Licentiate thesis, KTH, Signaler, sensorer och system, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-712.
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Miller, Robin J. "COFDM for HF digital broadcasting." Thesis, University of Brighton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287067.
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Lin, Xiao. "High quality audio coding." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357991.
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Paradise, Richard A. "Modeling and simulation of the physical layer of the single channel ground and airborne radio system (SINCGARS)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FParadise.pdf.
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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 2005.<br>Thesis Advisor(s): Frank Kragh, Herschel H. Loomis. Includes bibliographical references (p. 55-56). Also available online.
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Bilbao, Héctor Uhalte. "DAB Transmission System Simulation." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2595.
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<p>DAB (Digital Audio Broadcasting) is the radio digital system developed as an european standard by the ETSI, EN 300 400, based on the Eureka-147 group works, to improve the performance of the analogue radio systems (AM and FM). The system is based on the OFDM technology which allows DAB to exploit the spectrum frequencies in a better way with a higher quality of sound for mobile receivers specially. The main part of the OFDM system is based on the FFT algorithms to spread the data flow over different orthogonal carriers. The simulation has been developed in Simulink<sup>TM</sup>and Matlab<sup>TM</sup>and the layout designed follows faithfully the standard for the transmission system. The simulation can be reloaded by the user with the information presented in this thesis. Thus, this work can be continued to complete the DAB whole system simulation. The results obtained running this simulation show the main DAB system characteristics.</p>
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Patel, Dipankumar Dalubhai. "Subjective effects of cell loss and bit error on compressed audio-visual applications over ATM." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314077.
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Hewavithana, Thushara Chinthaka. "Algorithms for long delay equalization and soft decision decoding in digital audio broadcasting receivers." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415088.
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Evers, Aaron S. "Evaluation and Application of LTE, DVB, and DAB Signals of Opportunity for Passive Bistatic SAR Imaging." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1398768956.
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Reese, Stephanie. "Der Funktionsauftrag des öffentlich-rechtlichen Rundfunks vor dem Hintergrund der Digitalisierung : zur Konkretisierung des Funktionsauftrages in 11 Rundfunkstaatsvertrag /." Frankfurt am Main [u.a.] : Lang, 2006. http://www.gbv.de/dms/ilmenau/toc/511997515.PDF.
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Scoma, David. "THE DEVELOPMENT OF LOOP-BASED CINEMATIC TECHNIQUES IN TWENTIETH CENTURY MOTION PICTURES AND THEIR APPLICATION IN EARLY DIGITAL C." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2227.
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For centuries, repetition in one form or another has been seen as a significant element in the artistic palette. In numerous formats of expression, duplication and looping became a significant tool utilized by artisans in a multitude of creative formats. Yet within the realm of film, the Griffith and Eisenstein models of cinematic editing techniques (as the most popular-- and near-monolithic--narrative aesthetic criteria) effectively disregarded most other approaches, including looping. Despite the evidence for the consistent use of repetition and looping in multiple ways throughout the course of cinematic history, some theorists and practitioners maintain that the influx of the technique within digital cinema in recent years represents a sudden breakthrough, one that has arrived simply because technology has currently advanced to a point where their utilization within digital formats now makes sense both technologically and aesthetically. This situation points to a cyclical problem. Students of film and video frequently are not taught aesthetical or editorial options other than standard industry procedures. Those who are interested in varying techniques are therefore put in the position of having to learn alternative practices on their own. When they do look beyond visual norms to try applying different approaches in their projects, they risk going against the views of their instructors who are only interested in implementations of the standard methods which have been in the forefront for so long. Yet the loop s importance and prevalence as a digital language tool will only likely grow with the evolution of digital cinema. With this is mind, the dissertation addresses the following questions: To what extent can various forms of repetitive visuals be found throughout film history, and are not simply technical manifestations that have merely emerged within digital cinema? How might current educational practices in the realm of film and video work to inform students of techniques outside of the common narrative means? Finally, what other sources or strategies might be available to enlighten students and practitioners exploring both the history surrounding--and possible applications of--techniques based upon early cinema practices such as the loop?<br>Ph.D.<br>Department of English<br>Arts and Humanities<br>Texts and Technology PhD
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Myronchuk, O. Y. "Two-stage optimal algorithm of joint estimation of information symbols and channel frequency response in OFDM systems." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/50639.
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1. Rohling H. (2011). OFDM Concepts of Future Communication Systems. Springer. doi: 10.1007/978-3-642-17496-42.
2. Chiueh Tzi-Dar. Baseband Receiver Design for Wireless MIMO-OFDM Communications / Tzi-Dar Chiueh, Pei-Yun Tsai, I-Wei Lai 2nd ed. John Wiley & Sons Singapore Pte. Ltd., 2012.
3. Myronchuk, O., Shpylka, O., & Zhuk, S. (2020). Two-stage Channel Frequency Response Estimation in OFDM Systems. Path of Science, 6(2), 1001-1007. doi: http://dx.doi.org/10.22178/pos.55-1
4. Myronchuk O. Algorithm Of Channel Frequency Response Estimation In Orthogonal Frequency Division Multiplexing Systems Based On Kalman Filter / O. Myronchuk, O. Shpylka, S. Zhuk // 2020 IEEE 15th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TCSET), Lviv-Slavske, Ukraine, 2020, pp. 31-34, doi: 10.1109/TCSET49122.2020.235385.
5. Мирончук А. Ю. Метод оценивания частотной характеристики канала в OFDM системах на основе фильтрации и экстраполяции пилот-сигналов / А.Ю. Мирончук, А.А. Шпилька, С.Я. Жук // Вестник НТУУ "КПИ". Серия Радиотехника. Радиоаппаратостроение. – 2019. №78. – С. 36 42. doi: 10.20535/RADAP.2019.78.36-42.
6. Шпилька, А. А., & Жук, С. Я. (2010). Совместная интерполяция данных и фильтрация параметров многолучевого канала связи. Известия высших учебных заведений. Радиоэлектроника, 53(1), 26–30. https://doi.org/10.20535/S0021347010010048
7. Shpylka, A.A., Zhuk, S.Y. Decoding of convolutional codes on a sliding window during signal propagation in a multipath communications channel. Radioelectron.Commun.Syst. 53, 497–501 (2010). https://doi.org/10.3103/S0735272710090086
8. Myronchuk O. Yu. Two-Stage Method for Joint Estimation of Information Symbols and Channel Frequency Response in OFDM Communication Systems / O. Yu. Myronchuk, A. A. Shpylka, S. Ya. Zhuk // Radioelectronics and Communications Systems. – 2020. Vol. 63. – No. 8, pp. 418 429. doi: 10.3103/S073527272008004X 9.Луцький М.Г., Корченко О.Г., Горніцька Д.А., Ярмошевич І.М. Модель оцінки якості експерта для підвищення об’єктивності експертиз у сфері інформаційної безпеки. Захист інформації. 2011. Том 13. Вип. 2(51).
DOI: 10.18372/2410-7840.13.2022<br>Orthogonal frequency division multiplexing (OFDM) is widely used in modern digital communication systems such as digital video and audio broadcasting (ISDB-T, DVB-T, DVB-T2, DRM, DAB), wireless broadband networks (IEEE 802.16), local area networks (IEEE 802.11a, g, n), mobile communication systems (LTE, LTE Advanced) and other. The main advantages of OFDM are high spectrum efficiency and possibility to provide high data transmitting speeds.<br>Мультиплексування з ортогональним частотним поділом (OFDM) широко використовується в сучасних цифрових системах зв'язку, таких як цифрове відео- та аудіомовлення (ISDB-T, DVB-T, DVB-T2, DRM, DAB), бездротових широкосмугових мережах (IEEE 802.16), локальній мережі мережі (IEEE 802.11a, g, n), системи мобільного зв'язку (LTE, LTE Advanced) та інші. Основними перевагами OFDM є висока ефективність спектру та можливість забезпечити високі швидкості передачі даних.
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Lin, On Sun, and 林昂生. "Design of Digital Audio Broadcasting (DAB) Receiver L-Band Down-Converter and RFICs." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/47879842208354114692.
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碩士<br>國立成功大學<br>電機工程學系<br>89<br>This thesis presents the design and implementation of L-band DAB downconverter RFICs, including LNA/mixer/AGC and phase-locked oscillator (PLO), in a standard 0.35m CMOS technology. The RF is from 1.452 to 1.492 GHz, the LO is at 1.28 GHz and the IF is from 172 MHz to 212 MHz. The single-stage LNA has 3.2 dB noise figure and only 3dB gain. The single-balanced mixer has 20dB noise figure , 16dB conversion loss. Simulation results of the 1.28 GHz PLO show that the output power is —2 dBm and the locking time is 15s. An external hybrid-circuit LNA with 26 dB gain and 2.2 dB noise figure is added, due to the low gain result of the implemented LNA RFIC. The LNA and a 250 MHz IF lowpass filter with the LNA/mixer/AGC RFIC construct a hybrid/RFIC downconverter (not including the PLO RFIC) for receiving measurement. The hybrid/RFIC downconverter has 13dB gain, 3.5 dB noise figure, -17 dBm P1dB and —7.5 dBm OIP3. For 1.2Msps 32-QAM digital modulation, the measured error vector magnitude (EVM) is 1.2%. With a DAB test encorder and a DAB test receiver for OFDM signal receiving test, the adjacent channel power ratio (ACPR) is —30.61 dBc and the sensitivity is -90dBm (BER=10-4 ) or -97dBm (BER=10-2 ). Further effort will be devoted to design and implement a complete CMOS L-band DAB downconverter RFIC.
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Chen, Chin-Lung, and 陳志龍. "CMOS Circuit Design of the RF Front-End for Digital Audio Broadcasting (DAB) Receiver." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/51643934538778822779.
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碩士<br>國立成功大學<br>電機工程學系<br>88<br>This thesis describes the design of a 2.5V 1.5GHz CMOS RF receiver
front-end for Digital Audio Broadcasting(DAB) system. The
receiver front-end combines a balanced low noise amplifer (LNA),
quadrature downconversion mixers, an LO quadrature generator
, LO input buffers, IF gain stages , a polyphase filter,
second gain stages, and output buffers all in one single CMOS
IC. Using polyphase image-reject architecture, CMOS RF
circuits, and on-chip filtering, the receiver is fully
integrated and eliminates off-chip SAW filters often seen in
heterodyne receivers.
Down to the signal path of this front-end design, the low
noise amplifier is a differential, cascode common-source with
inductive source degeneration type. The planar spiral inductor
used in LNA boost the gain performance and enable low voltage RF
circuits to be monolithically integrated. Combined with the
current-reused architecture and power-constrained noise optimization techniques,
the LNA can achieve 29.4dB voltage gain, -29.2dB S11, 25mW power consumption,
and 2.38 dB NF, obtained from simulation. The down-conversion
mixer employs a double balanced Gilbert Cell type mixer with
common mode feedback circuit. Simulation shows it can achieve
7.5dB conversion gain and -5dBV IIP3.
This RF receiver front-end is designed in TSMC 0.25$\mu$m
single-poly, five-metal mixed-signal CMOS process, operated with 2.5V power supply.
The spiral inductor and MOS RF model, from the TSMC process,
are adopted in the receiver design.
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Wang, Jong-Tzong, and 王仲宗. "Design of Digital Autio Broadcasting (DAB) Receiver L-Band Down- converter and RFICs." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/87378892920327871360.
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碩士<br>國立成功大學<br>電機工程學系<br>86<br>This thesis presents the design, implementation, and
measurement of a L-band downconverter, VHF circuits, and related
RFICs for a digital audio broadcasting (DAB) receiver RF front-
end. A dual frequency conversion strategy is employed in this
RF front-end (1.452-1.492 GHz). The 1st LO is at 1.28 GHz and
the 1st IF is from 172 MHz to 212 MHz. The 2nd LO (for VHF
tuner) is from 215 MHz to 255 MHz and the 2nd IF is 43 MHz. The
L-band downconverter includes a single-stage low noise amplifier
(9.7 dB gain and 1.65 noise figure) , a voltage control
amplifier (50 dB turning range and 17 dB gain), a phase-locked
oscillator (6 dBm output power and -95 dBc/Hz@ 10 kHz), and an
active mixer (8 dB noise figure, 15 dB conversion gain and 15
dBm OIP3 ). The L-band downconverter with 43 MHz voltage
control amplifier (70 dB turning range and 38 dB gain) are
design and combined with suitable IF ICs and filters to form a
DAB receiver RF front-end (not including the VHF frequency
synthesizer). The DAB receiver RF front-end has 65 dB
conversion gain, 5 dB noise figure and 19 dBm OIP3. In digital
modulation measurements, a 384 kbps p/4-DQPSK signal is applied
to the DAB receiver RF front-end and measured by a HP 89410A
vector signal analyzer. The measured error vector magnitude
(EVM) is 1.3% and adjacent channel power (ACP) is 43 dBc. For
1.6 Mbps 16-QAM digital modulation, the error vector magnitude
is 2.6% and adjacent channel power is 38 dBc. This thesis
also presents the design and measured performance of a DAB L-
band LNA and mixer RFICs. For RFIC design, the equivalent
circuits of RFIC/MMIC components are developed by using the HP-
MDS RF/Microwave circuit CAD tool. The two-stage LNA RFIC has
18.2 dB gain, 3.2 dB noise figure and 18.4 dBm OIP3. The dual-
gate mixer RFIC has 2 dB conversion loss, 20 dB LO-RF isolation
and 9.4 dB OIP3.
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Su, Wen-yenn, and 蘇文彥. "A Research on the Correlations between the Media Conglomerates and the Popularization of the Digital Audio Broadcasting Industry–A case study in DAB development in UK." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/95830853350247907386.
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碩士<br>世新大學<br>傳播管理學研究所(含碩專班)<br>99<br>In the backdrop of deregulation policy and media liberalization prompted by the deployment of new technology, and in the trend of media digitization and convergence, the destiny of Digital Audio Broadcasting, or DAB, has been different between UK & Taiwan after more than 10 years of its application. The former has been a model to the world of the employment of this innovative technology, but in Taiwan it has been toppled in to a state of silence. Why is this so?
In the light of the Innovation theory by Joseph A. Schumpeter and New Institutionalism by Lance Davis& Douglass North,” Invention” is always prior to “Innovation”. The promotion of the Innovation is caused by the recession of economy. And the Innovation will be meaningless unless there is a strong determination of a leader who take advantage of an invention and the economic benefits the Innovation produced.
The determined-leading & mutual benefits of the corporation of British government and industries has played a significant role in the popularity of DAB in UK, while the conglomerate-oriented transformation in the radio broadcasting industry also provide the support to the development of new system in UK. And this is in the line with the principle mentioned above. As to the case in Taiwan, the toppled development of DAB represents a combination results of inadequate media policy, unsuitable consultation to the government and unwillingness of the investment to innovation from the industry which has been constrained in size and finance by the Broadcasting Act in the face of an era of digitization.
In the efforts of the study to DAB development & the radio industry policy of UK, the research believe that under the international tide of cross-national & cross industry operation of media, and its pursuit of scale, the first priority for Taiwan in the development of radio digitization is the take up of innovation under a close corporation between government and operators. The deregulation of the restrictions to the industry of its diversified operation and cross-industry merging should be commencing at this very moment to safeguard existence and digital upgrading of the industry.
The notions of this research also includes suggestions to the operators and government, expecting it will be a useful contributions to the carry- out of the governments ” Development programs in digital convergence” unveiled in July, 2010.
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Huang, Lee-Tsair, and 黃李財. "Digital Audio Broadcasting Principles and Applications." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/15787488217863120845.
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碩士<br>淡江大學<br>資訊工程學系<br>92<br>While steps into the 21st century, the whole world is carrying on digital revolutions, the information, the communication, as well as the entertainment presented by the rich lively content forms; Therefore, the broadcast service need to preserves the audience even continues to develop, at present, it then must compete against Internet, mobile phone, as well as digital televisions and so on, in the technology and the application.Today, while the traditional broadcast (the AM amplitude modulation and the FM frequency modulation) have been regarded as the obsolete technology, and will be replace by the other consumer technologies, hence, the broadcast technology must innovate and the modernization, achieves the same as CD and DVD qualities . The broadcast must become multimedia service provider, simultaneously maintains the mobility and may gain the information everywhere. In other words, the broadcast technology and the service needs to carry on the big transformation, then can survives form more compete day by day in the time.In the paper, discusses Digital Audio Broadcasting principles and applications, aims at European EUREKA-147 system, analysis its construction, function and the receiver function request, EUREKA-147 system is at present the system which widely uses, in broadcasts digitize have its contribution to the multimedia dissemination and hope will solve the problem when advance broadcasting digitize.
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HUANG, KUN-YU, and 黃坤裕. "Practice in Audio Decoding Program of Digital Audio Broadcasting Receiver." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/34980061035859106714.
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碩士<br>中華大學<br>電機工程學系碩士班<br>98<br>Digital Audio Broadcasting(DAB) is a new broadcast transmission technology and different from the well-known amplitude modulation(AM) and frequency modulation(FM) broadcast technology. The audio coding-decoding format of Digital Audio Broadcasting takes MPEG-1/2 layer II audio coding method as the foundation, and then adds Program Associated Data (PAD). In this thesis, I design the audio decoding program of Digital Audio Broadcasting Receiver by using a personal computer as the simulation platform. The input of this decoding program is the audio source signal which is decoded from Main Service Channel (MSC), and the output is a decoded PCM audio file or directly audible program voice. Since the main function of PAD is transmitting text or video, that doesn’t have much to do with audio signal, so I don’t discuss PAD in this thesis.
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Yung, Kai-Shun, and 楊凱翔. "Design of Antennas for Digital Audio Broadcasting." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/01480812615521224761.
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碩士<br>國立臺灣科技大學<br>電機工程系<br>97<br>The research is used by low cost and easy making PCB. To design and compare of utilizing two different kinds of Antenna which are spiral-line and meander-line in digital broadcast reception. The frequency specified by digital audio broadcast(DAB) is Band III (174-240 MHz),and L band (1452-1492 MHz).This research is focus on the design of a Band III antenna.
At the first beginning, this research is simulated the behavior of Antenna by using high frequency simulate software HFSS. Making Antenna is based on using PCB which is according to the acceptable result of simulate Antenna route. The advantage of designing the route of spiral-line Antenna is smaller dimension and the disadvantage is extreme narrow frequency .But this structure is not suitable. At the second step, the research is designed the Antenna route of meander-line. The advantage is wide range of frequency and the disadvantage is bigger dimension comparing to the pervious spiral-line experiment. In conclusion ,we have found out the meander-line is the best design in this research.
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Hsieh, Yihung, and 謝宜宏. "FPGA IMPLEMENTATION OF OFDM FOR DIGITAL AUDIO BROADCASTING." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/63435029427937263495.
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碩士<br>國立雲林科技大學<br>電機工程系碩士班<br>89<br>The advanced techniques of digital signal processing adopted in Digital Audio Broadcasting system not only provide high quality audio but also conquer the impact of the fading channel. This paper is to evaluate the architecture of Digital Audio Broadcasting and hardware implement, especially focusing on implementing Orthogonal Frequency Division Multiplex and Interleaver by Verilog HDL language. We also investigate the optimum hardware implementation of the Fast Fourier Transform to further reduce the hardware complexity without degrading its efficiency. In this paper, Radix-2 Butterfly, Controller, and Random Access Memory are proposed to realize the OFDM circuit. In practice, real-time processing is as important as the size and cost of hardware. For consideration of hardware in this study, high Density Logic Integration and higher performance complex Programmable Logic Device are chosen to accomplish the overall architecture of Digital Audio Broadcasting.
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Jen, Cheng-min, and 任正民. "DESIGN OF ANTENNA FOR DIGITAL AUDIO BROADCASTING RECEPTION." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/k492fa.
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碩士<br>大同大學<br>通訊工程研究所<br>95<br>In this thesis, three printed antennas were studied for digital broadcast reception. The first one is a meandered loop antenna. Being in a meandered form, it can be made very compact. However, the gain and efficiency are quite low. In our study, the achieved gain is only -30dBi. Therefore, this configuration is not practical in use. We then studied a bow-tie antenna. Bow-tie antenna is typically considered to be a wide-band antenna. It takes more space than the loop antenna. Although the gain is increased up to 1.85dBi, the measured bandwidth of around 8% is less than what is required in DAB reception. The last one understudy is a dipole-patch antenna. This antenna is constructed by roughly half-sizing the previous bow-tie antenna. Measured -10db return loss bandwidth of the third antenna ranges from 192 to 236 MHz, or 21% bandwidth centered at 214MHz. The gain is 1.78dBi within the whole interested band. The third antenna is generally accepted for DAB reception.
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Huang, Chorng-Ming, and 黃崇銘. "A 1.4GHz CMOS Frequency Synthesizer for Digital Audio Broadcasting Receiver." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/11513758514189251274.
Full textAbstract:
碩士<br>國立成功大學<br>電機工程學系<br>88<br>CMOS RF has been a hot topic of circuit design for wireless
receivers. One of the research area is the GHz CMOS frequency synthesizer
design. In this thesis, several approaches to realize frequency
synthesis are compared. The one using PLL technique has the advantages of higher
operating frequency, low cost, and less circuit complexity. The frequency
synthesizer in this thesis is designed based on PLL architecture.
Voltage controlled oscillator ( VCO ) and prescaler are key components in the frequency
synthesizer. Ring oscillator is adopted as VCO in the frequency
synthesizer loop to generate GHz frequency in the thesis. Low phase noise ring oscillator
is obtained due to the use of saturated delay cells which perform
fully switching of device current. The designed prescaler using
differential D-flipflops has well supply noise rejection. It induces less
jitter to the synthesizer loop when there are current switching
and signal coupling in the power line.
A 1.4GHz frequency synthesizer is designed and
implemented in 0.35um, one poly, four metal, CMOS process
operating at 3.3V power supply.
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Lee, Ton-Shing, and 李東興. "Simulations and Measurements of Wave Propagation for Digital Audio Broadcasting." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/43467400340266876935.
Full textAbstract:
碩士<br>樹德科技大學<br>電腦與通訊研究所<br>91<br>Simulations and Measurements of Wave
Propagation for Digital Audio Broadcasting
Student: Ton-Shing Lee Advisors: Dr. Yih-Chuan Lin
Dr. Wen-Tzu Chen
Department of Computer and Communication Shu-Te University
ABSTRACT
The purpose of this thesis is to measure and simulate the wave propagation loss for Digital Audio Broadcasting in Taiwan. We measured the electrical field in Chiayi county, Tainan county, and Kaohsiung city. We constructed the wave propagation models by means of analyzing the measured data and comparing with the simulation results.
The results showed that Hata model gave better agreement in urban and suburban regions. Lee''s model is also in good agreement in urban and suburban regions. Egli and Walfisch-Ikegami models are both are in good agreement in suburban and open regions.
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Wang, Nai-Rung, and 王乃宗. "The Competitive Strategy Analysis of Taiwan Digital Audio Broadcasting Industry." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/61505826371774873720.
Full textAbstract:
碩士<br>國立臺灣大學<br>國際企業學研究所<br>92<br>THESIS ABSTRACT
GRADUATE INSTITUTE OF BUSINESS ADMINISTRATION
NATIONAL TAIWAN UNIVERSITY
NAME: NAI-RUNG WANG MONTH/YEAR : JUN/2004
ADVISER: DR.WU, CHING-SUNG
THE COMPETITIVE STRATEGY ANALYSIS OF TAIWAN DIGITAL AUDIO BROADCASTING INDUSTRY
The purpose of this thesis is to explore the driving forces of the DAB system diffusion and the competition structure of Taiwan audio broadcasting industry. What the key successful factors and its opportunities and threats are. This thesis attempts to formulate a dynamic competitive fit strategy for the industry to cope with this rapidly changing digital world economy.
This is accomplished by applying the M. Porter’s five forces model to survey the outside-in relative force of the competition and Prahala & Hamel’s core competence model inside-out approach to empirically study of the difference between UK and Taiwan’s DAB industry.
The main achievement of this study is to develop an integrative conceptual framework. This enables the formation of the digital oriented business model that can transform the first mover advantage into a sustainable competitive advantage. By developing the awareness of the disruptive innovation technology, and emerging the DAB network into 4C (consumer, computer, content, communication) multimedia platform will realize the increased profits.
This analysis and findings concerning the Taiwan DAB OEM/ODM industry strategic positioning and value adding activities can be of significant help to government policy maker, content provider and its Broadcasters.
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Hsu, Chih-Chien, and 許志謙. "Conversion of Digital Audio Broadcasting Signal to Analog Radio Frequency Signal." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/62189259048093408104.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>電機工程系<br>96<br>As the diffusion of digitization, people pay much more attention to Digital Audio Broadcasting (DAB), which is adopted in some countries. It offers the advantages that analogue audio broadcasting, such as FM and AM broadcasting, don’t have. These advantages include improved reception, improved clarity of sound, greater radio station choice, better channel utility rate and so on.
In this thesis, there is a design about a adapter that has the conversion of a digital audio broadcasting signal to an analog radio frequency signal. The device offers users a cheap way to enjoy listening Digital Audio Broadcasting. People can listen Digital Audio Broadcasting and analogue audio broadcasting programs without a DAB radio receivers. The system of the device include Digital Audio Broadcasting Tuner, Radio Data System Encoder, Baseband Mixer, Subcarrier Modulator, Frequency Modulation Modulator and Microprocessor.
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李承中. "A Research of the Possibility that a Public Service Broadcasting Station Runs the Digital Audio Broadcasting." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/51691224352628387911.
Full textAbstract:
碩士<br>世新大學<br>傳播研究所(含博士班)<br>91<br>On February 29, 2000, The Directorate General of Telecommunications, Ministry of Transportation and Communications (DGT) announced the result for selecting the candidates to run the Digital Audio Broadcasting (DAB). The selected candidates which were Central Broadcasting System (CBS), The Voice of Han Broadcasting Network（VOH） , Public Radio System（PRS）,National Education Radio（NER）, set up a joint station named "the Public Broadcasting Trial Station" (PBTS) and got trial channel which cover the whole area. Now the trial period is coming to an end. The channel is going to be released to the public. Will the above four Public Service Broadcasting Stations (PSBS) continue to cooperate to run a DAB Station? And what is the possibility? This research is trying to find out how the PBTS should integrate the resources from PSBS and the characters of DAB, and find their privilege to win the channel.
This thesis is a quality research. Based on the theory of "Digital Environment and Public Service Broadcasting", "The Strategy of Running Broadcasting Station", "Diffusion of Innovations", and "Media Uses and Gratification Theory", I focused on the analysis of the above mentioned four PSBSs' internal causes and external environment individually. Through interviews, observing and case studies, I try to find out "is it practical if PSBS runs DAB?"
The conclusion is that PSBS running DAB is practical. In this research, I also discover that the organization is not suitable for running DAB, a joint venture may reduce costs, the program production team should involve in producing DAB programs as soon as possible, the integration of techniques of software and hardware should be improved, and, public service and disaster prevention should be constantly stressed. The conclusions and discovery may be a reference for further researches.
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Tseng, Chu-Min, and 曾竹敏. "The Influence of Music on The Product Image of Audio Devices－A Case Study of Digital Audio Broadcasting Devices." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/27884643130026011677.
Full textAbstract:
碩士<br>大同大學<br>工業設計學系(所)<br>99<br>ABSTRACT
Digital Audio Broadcasting DAB provides excellent multimedia information service. Not only does DAB deliver audio broadcasting comparable to that of CD sound quality but it also offers background information and message related to music programs; DAB produces a new form for the function technology of life and a unique lifestyle. The psychological perception for vision is comparably pleasing as that for hearing though the forming designs of digital audio-broadcasting receiver.
The study aims to understand the association between the product forms, interface distributions and musical perception, in attempt to discover the product form suitable to the music type. The experiment design is divided into two stages. We discover from the Pre-test experiment that a good form design for digital audio broadcasting receiver will attract more expectation towards the form before even listening to the music broadcasted.
In the experiment of body form and state of interface distribution, the understanding of the different consumer perceptions for the form and interface distribution of digital audio broadcasting receivers will acquire different expected audio perceptions. We discover from the experiment that among the 6 form characteristics, three of them were not affected by the music form, regardless of music, graceful, fluent, and fashion. Nonetheless, calm, simple and mellow will have different results under the different music form
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Fu, Fred, and 傅志明. "The Evolution and Application of Digital Audio Broadcasting Industry in Taiwan- The Case Study of company A." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/29323869590135575780.
Full textAbstract:
碩士<br>輔仁大學<br>科技管理學程碩士在職專班<br>97<br>Digital Audio Broadcasting is a new broadcasting technique after the traditional analog broadcasting. Nowadays, various kinds of media transmission systems have been developed rapidly. Thus, broadcasting has become increasingly important and highly focuses on variety services.
Since AM and FM radio are only able to convey audio services and unable to provide multimedia services, utilizing Digital Audio Broadcasting is the way to overcome this weakness and making the radio broadcasting technique transfer into a brand-new all-digitalized platform for AM and FM. It is a milestone in broadcasting history. Moreover, by looking at its capability, DAB is able to transfer considerable quantity of digital images, texts, graphs and so on. The development and spread of DAB enhances the capability of us into the abundant and variety information era.
This thesis is according to the revolution of domestic and European digital broadcasting and brings the idea that the market trend is meanly affected by abilities of convenience and function. In conclusion, Besides, via reviewing bibliographies from both domestic and aboard and interviewing industrial manager, enabling us to clarify that the problems and bottleneck s of digital broadcast in our country. In order to bring up a perspective to the direction of digital broadcast development, this thesis worked by way of collecting and researching the data which content with the development and application of domestic and European digital broadcast industrial market and further analyzing its strength and weakness.
The thesis provides the recommendations to the government and company A based on the development of DAB in Taiwan and future. In addition, it also raises some suggestions for further studies.
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Wang, Tzu-Wen, and 王姿雯. "Pilot Study of Using Motivation and Gratification for The Initial Users on The Digital Audio Broadcasting Constructive Period in Taiwan." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/71577729205063591057.
Full textAbstract:
碩士<br>玄奘大學<br>資訊傳播研究所<br>97<br>Following the rapid advancement and in general use of digital technology, Digital Audio Broadcasting (DAB) is developing accordingly by breaking through the restriction of analogy signal. This study is to explore the using motivation and gratification for the initial users on the DAB constructive period in Taiwan by using the approach of literature data analysis and depth interview to figure out what is going on about the stagnation of the DAB and the initial users’ satisfaction and appraisal.
The findings of this study show that the initial users are not satisfied with the DAB and give it a low mark on evaluation. Some recommendations are given as follows: firstly, rules and regulations should be remedied to meet the DAB’s features, co-ownership management and value-added service; secondly, setting up common iron tower and transmitting station by government and promoting the policy of separation of production and broadcasting respectively to integrate the conglomerate between the broadcasting and TV, communication and electronic industries; thirdly, cultivating the talents about the digital content innovation to lower the digital divide; fourthly, taking Japan and Korea digital media success as the role model to market the digital broadcasting industry actively. In short, those findings and recommendations can be a follow-up reference for further study in this field.