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Timing-offset compensation techniques in ATSC DTV receivers  

김용철 (전남대학교 전자공학과)
김대진 (전남대학교 전자공학과)
Publication Information
Journal of Broadcast Engineering / v.8, no.2, 2003 , pp. 146-152 More about this Journal
Abstract
ATSC DTV receivers use repetitive data segment syncs or Gardner algorithm as a tuning recovery circuit. Many multipath signals can induce timing-offset in the symbol timing recovery circuit using Gardner algorithm and this timing-offset shifts sampling instant to the wrong points, causing the performance of the equalizer to become nr. When many echoes exist, the optimal sampling instant will be the Point at which the main-path has a peak value. In this paper, by using channel correlation techniques, we find the optimal sampling instant, thereby compensating the timing offset and improving DTV reception performance. We analyzed the Performance enhancement of DTV receivers using the timing offset compensator.
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  • Reference
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3 F. M. Gardner, A BPSK/QPSK timing recovery in digital synchronous data receivers, IEEE Trans. on Commun., COM-24, May, 1986
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