Apparatus and method for transmitting/receiving preamble signal and estimating a channel in an orthogonal frequency division multiplexing communication system using a multiple input multiple output scheme

The present invention in a signal reception apparatus in an orthogonal frequency division multiplexing communication system using a multiple input multiple output system, when the signal receiving apparatus using the N Here, the preamble signal in the time domain is equivalent to the transmission antenna in the case where the signal transmission device is used the N Guard band, the time domain preamble sequence, a frequency-domain preamble sequence, MIMO-OFDM, LMS method, LS method, linear interpolation method, MMSE method