Patent ID: 8861633

Claim:
A channel estimation apparatus in a wireless communication system, comprising: a first channel operation unit for carrying out an operation on pilot channel estimation value of pilots, which are transmitted from a transmitting antenna that transmits a preamble, as an improved pilot channel estimation value with respect to each of a plurality of receiving antennas by employing a preamble channel estimation value based on the preamble included in received signals received by the plurality of receiving antennas, respectively; a first channel estimation unit for estimating a channel for each of the receiving antennas through interpolation of a symbol axis and a frequency axis employing the improved pilot channel estimation value; and a second channel estimation unit for estimating a channel for each of the receiving antennas through interpolation of a symbol axis and a frequency axis employing pilot channel estimation values of pilots transmitted from the same transmitting antenna, of pilots transmitted from a transmitting antenna that does not transmit the preamble, of a plurality of transmitting antennas.