Patent ID: 7688907

Claim:
A method for channel estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system, comprising: determining a distribution density of pilot OFDM symbols according to the maximum Doppler frequency shift supported by the system, setting a relation between the length of data part of a pilot OFDM symbol N p,data and the length of data part of a data OFDM symbol N d,data as the following formula: N p , data = 1 2 n · N d , data , wherein ⁢ ⁢ n = 0 , 1 ⁢ ⁢ … ⁢ , and transmitting pilot OFDM symbols and data OFDM symbols based on the distribution density of the pilot OFDM symbols by a transmitter; and estimating frequency-domain channel information of the data OFDM symbols according to the received pilot OFDM symbols by a receiver.