Channel estimation in ofdm cellular systems

A channel estimating method and apparatus in an OFDM(Orthogonal Frequency Division Multiplexing) cellular system is provided to improve a channel estimating performance by estimating and eliminating mutual interference in a channel estimating process. An estimation response to a high-density pilot symbol is calculated by extracting a subcarrier of the high-density pilot symbol(501). The calculated estimation response is divided into several sections at a predetermined interval to calculate a division response in each divided section(504). A channel response to the high-density pilot symbol is calculated by using the first division response(505). An estimation response to a low-density pilot symbol is calculated by extracting a subcarrier of the low-density pilot symbol(506,508). A channel response to the low-density pilot symbol is calculated by subtracting an accumulated value of the division response from the estimation response of the low-density pilot symbol(509).