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An example of a modem for two-resolution digital terrestrial transmission, providing two programs in a single 8 MHz channel is described. For each program, it is desired to transmit 5 Mb/s to portable receivers and additionally 5 Mb/s to fixed receivers. In the example, orthogonal frequency division multiplexing (OFDM) is used with guard intervals as in digital audio broadcasting. The two-resolution transmission is achieved by using a two-resolution quadrature amplitude modulation (QAM) signal constellation. Reed-Solomon coding gives burst error correction capability to combat the frequency selective nature of the transmission channel. The two-resolution system can easily be reconfigured into a compatible system, providing high-definition television to fixed receivers
Published in:
Communications, 1993. ICC '93 Geneva. Technical Program, Conference Record, IEEE International Conference on
(Volume:3
)
Date of Conference: 23-26 May 1993
- Page(s):
- 1785 - 1790 vol.3
- Meeting Date :
- 23 May 1993-26 May 1993
- Print ISBN:
- 0-7803-0950-2
- INSPEC Accession Number:
- 4972638
- Conference Location :
- Geneva
- Digital Object Identifier :
- 10.1109/ICC.1993.397588
- Product Type:
- Conference Publications
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