Channel estimator through comprising the same pilot detector, OFDM receiving apparatus comprising the same channel estimator, and method for estimating channel through restoring distorted pilot

摘要

The present invention provides a channel estimator for estimating a channel through distortion pilot recovery, which can improve channel estimation performance by recovering distortion of a pilot caused by DC rejection or impulse noise, and estimating a channel using the recovered pilot, An OFDM receiver including the channel estimator and a channel estimation method through distortion pilot compensation are provided. The channel estimator includes: a delay delaying an Orthogonal Frequency Division Multiplexing (OFDM) signal on which a Fast Fourier Transform (FFT) is performed for a predetermined time; A pilot recovery unit that detects and recovers distortion of a pilot extracted from the OFDM signal; An interpolation unit for performing interpolation using a pilot recovered from the pilot recovery unit; And an equalizer (Equlaizer) for compensating for signal distortion by using the channel estimate extracted through the interpolator with respect to the signal output from the delayer.;Orthogonal Frequency Division Modulation (OFDM), Digital Video Broadcasting-Handheld (DVB-H), Fast Fourier Transform (FFT), Guard Interval (GI), Digital Video Broadcasting-Terrestrial (DVB-T)