Synchronization signal detection circuit and method of digital television (DTV) receiver
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United States of America Patent
Stats
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Oct 13, 2009
Grant Date -
Apr 13, 2006
app pub date -
Oct 12, 2005
filing date -
Oct 12, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A synchronization signal detection circuit and method of a digital TV (DTV) receiver are provided. The synchronization signal detection circuit determines a precise main path by determining powers in consideration of the influence of multiple paths near signals located at a peak value location and guarantees a stable operation of an equalizer by using error values output from a decoder to generate a synchronization locking control signal. A power signal based on the correlation of the received signal with a PN511 sequence is filtered to compensate for a dynamic multipath distortion (e.g., due to other multipath signals near signals located at a peak value location). The magnitude of the filtered power signal is then compared (e.g., with a predetermined threshold value) to determine the position of the main path (e.g., at the peak value location, or at a pre or post multipath signal location).
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Family
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Cited Art Landscape
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