Channel estimation method and channel estimator for OFDM / OFDMA receiver

摘要

A channel estimation apparatus and method for an OFDM/OFDAM receiver. A channel characteristic value, positioned prior to a pilot symbol of a current slot, from among data symbols of the current slot is estimated by a time-domain interpolation method for use with a channel characteristic value of a pilot symbol of a previous slot and a channel characteristic value of the pilot symbol of the current slot. A channel characteristic value next to the pilot symbol of the current slot from among the data symbols of the current slot is estimated by a time-domain extrapolation method for use with the channel characteristic value of the pilot symbol of the previous slot and the channel characteristic value of the pilot symbol of the current slot.