The conventional channel estimator in OFDM system was designed to cope with the worst-case channel condi-tion

thus performance degradation can be induced due to the imperfect channel estimation.Though wiener filter based on the minimum mean-squared error（MMSE） is the optimal linear estimator

it requires the prior information of transmis-sion channel.In order to select the near optimal prestored channel interpolation filter coefficients

three channel parame-ters detecting methods including maximum multipath delay

Doppler frequency and SNR based on the time and fre-quency correlation functions of the channel

the Euclidean distance of hard-decision in pilots position respectively

were proposed.The method proposed with low complexity allows an efficient implementation for adaptive channel estimation algorithm as well as multi-user OFDM systems.