APPARATUS AND METHOD FOR ESTIMATING CHANNEL IN WIRELESS COMMUNICATION SYSTEM

摘要

The present invention relates to an apparatus and a method for estimating a channel in a wireless communication system. At this moment, A reception end comprises a channel estimator for estimating a first channel value using a pilot symbol included in a reception signal; a demodulator for demodulating the reception signal using the first channel value estimated in the channel estimator; a demodulation unit for demodulating the reception signal demodulated in the demodulator; a feedback determination unit for determining the repetitive channel estimation according to the demodulation result of the demodulation unit; and a feedback apparatus for giving feedback on an input value of the demodulation unit when the repetitive channel estimation is determined in the feedback determination unit. The channel estimator estimates a second channel using the pilot symbol included in the reception signal or a data symbol provided from the feedback apparatus when the repetitive channel estimation is determined in the feedback determination unit. [Reference numerals] (200) OFDM demodulator; (202) Channel estimator; (204) Demapper; (206) Deinterleaver; (208) Demodulation unit; (210) Feedback determination unit; (212) Feedback control unit; (214) Interleaver; (216) Mapper