Ladas & Parry LLP
Apparatus and method for correcting frequency offset in satellite digital video broadcasting system
An apparatus and method for correcting a frequency offset in a satellite digital video broadcasting system includes a frequency response transformer for receiving a satellite digital video broadcasting signal and acquiring frequency responses divided into positive and negative frequency parts; a rotation/difference value calculation unit for selecting a frequency response inputted from the frequency response transformer and calculating a first value indicating a difference in area without rotation for the selected frequency response, and calculating a second value indicating a difference in area with rotation for the remaining frequency responses; a zero intersection point calculator for dividing an average slope of a straight line formed by the first and second values by the first value, and calculating a zero intersection point of an area difference value on the straight line; and a frequency offset estimator for correcting the zero intersection point to thereby estimate the frequency offset.
Electronics and Telecommunications Research Institute
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inventional inventional inventional inventional
Deock-Gil Dae-Ig Pan-Soo Seong-Jun Tae-Hoon
Oh Chang Kim Lee Kim