Method for estimating channel in a wireless communication system using mutiple input multiple output scheme

The present invention is a multiple-input multiple-output for a plurality of transmission antennas and multiple receiving antennas (MIMO: Multiple Input Multiple Output) in a mobile communication system using the method, channel estimation signal in the transmitter for channel estimation at the receiving end in the transmission method, the step of transmitting to the same channel estimation signal in the first frame transmission period in each of the plurality of transmit antennas, in the second frame transmission periods constitute one predetermined channel estimation signal corresponding to the number of transmit antennas It characterized in that it comprises. A multiple-input multiple-output orthogonal frequency division multiplexing, channel estimation, the preamble