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UBC Theses and Dissertations
Performance evaluation of the ISDB-T standard for multimedia services Wang, Xinrong
Abstract
The Integrated Services Digital Broadcasting - Terrestrial (ISDB-T) standard is one of the three dominant digital television terrestrial broadcasting standards. It employs concatenated coding and OFDM techniques to combat fading and multipath channel impairments. ISDB-T operates in 6, 7, or 8 MHz channel bandwidths, with each channel supporting up to three different services. These services may use different convolutional code rates, modulation schemes, and time interleaving lengths to meet different quality of service requirements. In this thesis, an ISDB-T baseband simulation model is implemented using SPW™, C, and C++, and validated. This model is built to accommodate all of the possible ISDB-T system configurations. Since the target BER in ISDB-T is very low, for example, 1x10⁻¹¹ for high definition television, it is impractical to obtain the BER directly using software simulation. A Markov chainbased semi-analytic method is used, which agrees well with available simulation results in nonfading environments. The semi-analytic results are quite different from the simulation results in fading channels, especially at very low Doppler frequencies. The channel undergoes deep fades at very low Doppler frequencies, causing a large number of symbol errors during these fading periods. The Markov chain model does not model these kinds of long error bursts very well. A numerical analysis is provided for very slow Rayleigh fading. The results of the numerical analysis agree quite well with the simulation results.
Item Metadata
Title |
Performance evaluation of the ISDB-T standard for multimedia services
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2002
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Description |
The Integrated Services Digital Broadcasting - Terrestrial (ISDB-T) standard is one of the
three dominant digital television terrestrial broadcasting standards. It employs concatenated
coding and OFDM techniques to combat fading and multipath channel impairments. ISDB-T
operates in 6, 7, or 8 MHz channel bandwidths, with each channel supporting up to three different
services. These services may use different convolutional code rates, modulation schemes, and
time interleaving lengths to meet different quality of service requirements.
In this thesis, an ISDB-T baseband simulation model is implemented using SPW™, C,
and C++, and validated. This model is built to accommodate all of the possible ISDB-T system
configurations.
Since the target BER in ISDB-T is very low, for example, 1x10⁻¹¹ for high definition
television, it is impractical to obtain the BER directly using software simulation. A Markov chainbased
semi-analytic method is used, which agrees well with available simulation results in nonfading
environments. The semi-analytic results are quite different from the simulation results in
fading channels, especially at very low Doppler frequencies. The channel undergoes deep fades at
very low Doppler frequencies, causing a large number of symbol errors during these fading
periods. The Markov chain model does not model these kinds of long error bursts very well.
A numerical analysis is provided for very slow Rayleigh fading. The results of the numerical
analysis agree quite well with the simulation results.
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Extent |
4607477 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-09-29
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0065304
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2002-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.