Third-generation DTV receivers showed significant improvement in ...
Third-generation DTV receivers showed significant improvement in reception capability over first- and 2nd-generation receivers, according to interim analysis by FCC Office of Engineering & Technology (OET). Using preliminary data collected in field study in Washington area, OET said median…
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signal-to-noise ratio, which generally determines reception quality, improved by 2-3 dB overall and by 6-7 dB for sites with strong-signal, high-multipath characteristics, such as those in which COFDM was supposed to outperform U.S. 8-VSB system. OET said DTV signal was viewable without impairments for 99 of 100 sites for outdoor 30-ft. antenna, and 85% of sites with indoor antenna, even though only 27% of sites had high-quality NTSC picture. “Statistically significant” improvement was attributed mainly to improved channel equalizers in newer receivers. OET said new receivers meant indoor antennas in latest field study outperformed outdoor antennas in 1998. Field study data collection is about 50% complete in D.C. area, OET said, and similar study is planned for Baltimore area.