Patent ID: 6515713
Filing Date: 2003-02-04
Classification: H04N

Abstract:
A method for compensating for channel distortion:(a) calculating a DC value from input data, reading the DC value a predetermined number of times in a specific cycle, detecting maximum and minimum values from the read DC values, judging if there is a moving ghost in the channel from a difference between the maximum and minimum values, and judging if there is a possibility that an equalizer diverges from a MSE of a signal equalized by the equalizer; (b) executing the equalization in a training sequence mode when it is judged that the moving ghost does not exist in the channel and there is no possibility that the equalizer diverges; (c) executing the equalization in a blind mode when it is judged that the moving ghost does not exist in the channel but there is a possibility that the equalizer diverges; (d) executing the equalization in a data mode when it is judged that the moving ghost exists in the channel and there is no possibility that the equalizer diverges; and (e) executing the equalization in the data mode and the blind mode when it is judged that the moving ghost exists in the channel and there is a possibility that the equalizer diverges.