Carrier and symbol timing recovery apparatus usable with a vestigial side band receiver and recovery method thereof
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United States of America Patent
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-
Jan 5, 2010
Grant Date -
Apr 13, 2006
app pub date -
Sep 29, 2005
filing date -
Oct 7, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A carrier and symbol timing recovery apparatus usable in a VSB (Vestigial Side Band) receiver, and a method thereof. For a carrier and symbol timing recovery, error information is detected using a pilot signal, an upper sideband and a lower sideband of a received signal. Each of the detected error information is multiplied by a predetermined weight, respectively, and the results of the respective multiplications are added/combined. Therefore, even though the pilot signal may be corrupted, the carrier recovery can nevertheless be accurately performed. Additionally, even though the upper sideband of a received VSB-modulated signal may be corrupted, the lower sideband can be utilized to perform the symbol timing recovery. As a result, performance of a receiving system can be improved even under unfavorable channel characteristics. Moreover, since the carrier recovery and the symbol timing recovery are executed through a single apparatus, it becomes possible to simplify a hardware implementation thereof.
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