APPARATUS AND METHOD FOR COMPENSATION OF CHANNEL IMPULSE RESPONSE ESTIMATION ERROR IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS

摘要

The present invention relates to an apparatus and method for compensating for a channel impulse response (CIR) estimation error in an Orthogonal Frequency Division Multiplexing (OFDM) system, An initial channel estimator for estimating an initial channel; an IFFT processor for estimating a CIR by performing Inverse Fast Fourier Transform (IFFT) on the estimated initial channel value; And a CIR error compensator for compensating a CIR estimation error for all paths by using the CIR value of the detected maximum power path and the CIR estimation error function, There is an advantage that the influence of the spectral leakage due to the influence and the protection band setting can be effectively removed. Furthermore, since the performance degradation due to the guard band setting is compensated for, and the channel estimation performance is improved, there is an advantage that the performance of the receiver can be improved.;OFDM, DFT-based channel estimation, CIR estimation error compensation, guard band