Apparatus for channel equalization and method thereof

Details Apparatus for channel equalization and method thereof Apparatus for channel equalization and method thereof

H - Electricity

04

N

H04N 5/44 (2011.01) H04N 5/213 (2006.01) H04N 7/64 (2006.01)

Patent

CA 2512158

Channel Equalization of a digital TV is disclosed. In channel equalization for restoring an original signal from a digital TV reception signal having passed through a channel, the present invention includes estimating an impulse response of the channel from a received signal having passed through the channel using conjugate-gradient algorithm, finding an equalizer coefficient in a frequency domain using the estimated impulse response of the channel, outputting a signal equalized by multiplying a signal resulting from transforming the received signal into the frequency domain by the found equalizer coefficient, and predicting to remove an amplified noise of the equalized signal using the conjugate-gradient algorithm in a time domain. Accordingly, the variation of the channel impulse response according to time can be tracked in the dynamic channel having fast channel variation as well as the static channel, whereby equalizing performance can be enhanced.

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