Patent ID: 7158770

Claim:
A channel estimation method for a mobile communication system, in which a receiving apparatus obtains an channel estimation uses to obtain a channel estimation result for use in detection of a data signal received from a transmitting apparatus, wherein said receiving apparatus receives a data signal containing a plurality of data symbols from said transmitting apparatus, estimates a data signal channel condition for each data symbol of said received data signal and detects said received data signal for each of said data symbol in accordance with the estimation result, wherein said receiving apparatus receives a pilot signal from said transmitting apparatus and uses said pilot signal to estimate said channel, wherein said pilot signal is sampled at a rate lower than a symbol rate of said data signal, and the sampled pilot signal is interpolated into the symbol rate of said data signal using an FIR filter operating at the symbol rate of said data signal and entered into the FIR filter, and wherein the output of the filter is used as a channel estimation result.