Academia.edu no longer supports Internet Explorer.
To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.
2000, IEEE Transactions on Broadcasting
Loading Preview
Sorry, preview is currently unavailable. You can download the paper by clicking the button above.
2006
2006, IEEE Transactions on Broadcasting
Digital broadcasting has been an area of active research, development, innovation and business models development in recent years. This paper presents a survey on the characteristics of the digital terrestrial television broadcasting (DTTB) standards, and implementation status of DTTB worldwide showing the standards adopted. It is clear that only the developed countries and some in the developing ones shall be able to beat the ITU set analogue to digital broadcasting migration deadline because of the challenges that these countries faces in digitizing their terrestrial broadcasting. The challenges to keep on track the DTTB migration plan are also discussed in this paper. They include financial, technology gap, policies alignment with DTTB technology, etc. The reported performance comparisons for the different standards are also presented. The interesting part is that the results for many comparative studies depends to a large extent on the objective behind such studies, hence counte...
2000, IEEE Transactions on Broadcasting
2007, Journal of the Brazilian Computer Society
2010, 2010 Fifth International Conference on Information and Automation for Sustainability
2009, IEEE Transactions on Broadcasting
2000, IEEE Transactions on Broadcasting
2004, IEEE Transactions on Broadcasting
In Digital TV Broadcasting, the Scheme of Single Frequency Network (SFN) has nontrivial advantages. By forming a SFN, a broadcasting system is able to serve an arbitrary large area with the same program within the same frequency block. At the mean time, the SFN structure provides the receiver with a potential of yielding the space diversity gain, while the power in every single transmitter is not increased. However, there are heavy artificial multipath propagation in the area covered by the SFN broadcasting. Traditionally, a transversal equalizer is used at the receiver to remove the SFN interference. The equalizer always cannot converge properly due to the over-long time delay and the over-large magnitude of the different paths from each transmitter of the SFN. To solve the problem, a new model based on the MIMO structure of the SFN is proposed in this paper, where the signal's space information is exploited. With the model in mind, a new receiving scheme is derived. By using a beamformer, signals with different incident angles are separated, so the problem caused by the over-long delay and the over-large magnitude is avoided. A bank of parallel sub-filters are used to remove the residual multipath spread. The space diversity gain is obtained at the output of a combiner.
2009, International Journal of Digital Multimedia Broadcasting
2000
Abstractó Recently, a comparison between OFDM (Orthogonal Frequency Division Multiplex) and single carrier with fractionally DFE (Decision Feedback Equalizer) was presented in the absence of channel coding. In this paper, we extend this comparison, considering convolutional coding. Rice and Rayleigh channel models limited to six echoes are assumed in the simulations. Index Termsó OFDM, Decision Feedback Equal-
2000, IEEE Transactions on Broadcasting
This paper is the second in a series titled “What’s Next for DOCSIS®:” (Young, 2012), and outlines the anticipated DOCSIS® near, medium, and long term next generation (NG) network specifications; identifies and presents high spectral efficiency (SE) modulation options capable of enabling DOCSIS® 3.1/NG network specification compliance; identifies the likely modulation technique winner(s) and why; and finally presents NG network operational, test, and troubleshooting challenges facing network installers and repair technicians.
With the spectrum liberation obtained by the deployment of Digital Terrestrial Television (DTT) and the analog TV switch-off, new bands are being assigned to IMT Long Term Evolution (LTE). In the first cellular deployments in the digital dividend at the 800 MHz band, problems emerged due to the interference that cellular networks can cause to DTT signals. Possible solutions imply either an inefficient use of the spectrum (increasing the guard band and reducing the number of DTT channels) or a high cost (using anti-LTE filters for DTT receivers). The new spectrum allocated to mobile communications is the 700 MHz band, also known as second digital dividend. In this new IMT band, the LTE Uplink is placed in the lower part of the band. Hence, the ITU-R invited to perform several studies and reported the results to WRC-15. In this paper, we analyze the coexistence problem in the 700 MHz band and evaluate the interference of LTE signals into DTT services. Several coexistence scenarios have been considered and laboratory tests have been performed to measure interference protection ratios.
2005, IEEE Transactions on Broadcasting
2009, … , IEEE Transactions on
2006, 2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications
2007, Journal of The Brazilian Computer Society
In early 2003, the Brazilian government accelerated the decision process on analog to digital transition of terrestrial TV broadcast infrastructure, naming this initiative The Brazilian Digital Television System (SBTVD). This paper describes the access device architecture we have proposed for the SBTVD, as well as related issues. We focused on several requirements among which: flexibility to support the social economical diversity enabling market implementations that can vary on cost, complexity and applications; digital inclusion targeting a minimal cost architecture providing a simple access device to information and services by convergent broadcast and point-to-point telecommunication means; and scalability targets incorporating state-of-the-art technology, considering emerging services and the current legacy analog TV infrastructure available in Brazil. We cover the following specific topics: an architecture overview considering scalability, interoperability and regional and international requirements, operating system and middleware interfaces, audio and video coding formats and associate standards, technical and economical analysis, usability and user interface consistency. Finally two prototypes for the outlined access device architecture are reported.
2006, 2006 IEEE Ninth International …
2006, 2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications
This paper is to investigate the hardware design and implementation of digital echo cancellation on-channel repeater (DECOCR) in DVB-T/H networks. There is a need for high isolation between transmitter and receiver antennas for on-channel repeater (OCR) to minimize feedback from the antenna coupling and to keep the system stable. Therefore, the adaptive echo canceller is to remove the echoes between the transmitter and receiver antennas in OCR to minimize the coupling. The design and implementation of DECOCR is based on the algorithm of echo cancellation by channel equalization. The paper will investigate the design and implementation of DECOCR based on digital signal processing (DSP) in FPGA device. The most important issues considered are to get shortest system process delay, highest SNR output and highest echo rejection rate. The laboratory measurement results show that the presented repeater can get up to 29dB echo cancellation and about 1us process delay with robust stability. ...
— In Mexico, the adopted standard for Digital Terrestrial Television is ATSC (A/53), which uses 8-VSB modulation. In addition, ATSC M/H (A/153) is the standard for Mobile and Handheld Television, which also uses 8-VSB but with several improvements in channel coding. Mexico recently lived the analog to digital television transition, for this reason the performance of some ATSC M/H commercial receivers was studied in this work. The objective of these laboratory tests was to evaluate the performance of the receivers for different FEC configurations and different Doppler frequencies, following the ATSC A/174 Recommendation issued in 2011. Also, the degradation of C/N threshold for some typical mobile reception channel models and SFN conditions was evaluated.
2000, IEEE Transactions on Broadcasting
2005, IEEE Transactions on Broadcasting
2011, 2011 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB)
2000, IEEE Transactions on Broadcasting
Abstrak TV digital adalah suatu teknologi yang menggunakan teknik transmisi digital dimana jika dibandingkan dengan TV analog memiliki kualitas penerimaan yang lebih baik, kebutuhan daya pancar yang lebih kecil, ketahanan terhadap interferensi dan kondisi lintasan radio yang berubah-ubah terhadap waktu serta penggunaan bandwidth yang lebih efisien. Di Indonesia, uji coba penyiaran TV digital telah dilaksanakan sejak pertengahan tahun 2006 menggunakan kanal 34 UHF untuk standar DVB-T (Digital Video Broadcasting-Terestrial) dan kanal 27 UHF untuk standar DMB-T (Digital Mobile Broadcasting-Terestrial). Sistem DVB mendistribusikan data menggunakan berbagai pendekatan yaitu satelit (DVB-S), kabel (DVB-C), terrestrial (DVB-T), dan TV terestrial digital untuk genggam atau handhelds (DVB-H). DVB-T merupakan DVB standar konsorsium Eropa untuk transmisi penyiaran televisi terestrial digital yang mentransmisikan suara, video dan data digital lain yang terkompresi menggunakan modulasi OFDM (Orthogonal Frequency-Division Multiplexing). Dengan menggunakan DVB-T dapat menyiarkan 8 kanal TV digital dengan satu trasponder satelit sehingga penggunaan bandwidth secara lebih efisien dengan kualitas gambar lebih baik.
2004, IEEE Transactions on Broadcasting
1998, IEEE Journal of Solid-state Circuits