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US Patent 7460147 Interference detecting circuit utilizing synchronization symbols and method thereof

Patent 7460147 was granted and assigned to Realtek on December, 2008 by the United States Patent and Trademark Office.

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Patent abstract

An interference detecting circuit for use in an ATSC system and for detecting interference of an ATSC signal includes: a buffering module for delaying to output a first PN63 synchronization format data when receiving the first PN63 synchronization format data; a correlation arithmetic circuit coupled to the buffering module for receiving the ATSC signal and performing a correlation operation on a second PN63 synchronization format data and the delayed first PN63 synchronization format data to output a detection signal when receiving the second PN63 synchronization format data; and a determining circuit for determining whether performing interference rejection on the ATSC signal or not according to the result of the above-mentioned correlation operation.

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