Patent ID: 8923456

Claim:
A method for channel estimation, performed by a communication system having a first pilot and a second pilot, the method for channel estimation comprising steps of: extracting pilot signals from a received multi-path signal, wherein each pilot signal comprises the first pilot and the second pilot; obtaining an initially estimated channel frequency-domain response based on an estimated delay of each pilot signal and the extracted first pilot; calculating a frequency-domain response estimate of each pilot frequency in the second pilot according to the obtained initially estimated channel frequency-domain response, obtaining an actual value of each pilot frequency in the second pilot based on the extracted second pilot, and calculating a deviation between the frequency-domain response estimate and the actual value of each pilot frequency; detecting whether an aliasing component exists in the initially estimated channel frequency-domain response; if aliasing components exist, determining a position of each aliasing component according to the deviation of each pilot frequency in the second pilot; and correcting the initially estimated channel frequency-domain response according to the determined positions of the aliasing components, so as to obtain final channel frequency-domain estimation.