Patent ID: 7389193
Filing Date: 2008-06-17
Classification: H04B,H04L

Abstract:
1. An apparatus for calibrating transmission paths in a multicarrier communication system using multiple antennas, comprising: a calibration processor for generating reference signals allocating the generated reference signals to subcarriers and calculating calibration vectors for the transmission paths using the generated reference signals and reference signals received through transmission paths; and a baseband module for inverse-fast-Fourier-transform (IFFT)-processing the generated reference signals allocated to the subcarriers and sending the IFFT signals in the transmission paths, wherein the calibration processor comprises: a reference signal generator for generating the reference signals and allocating the generated reference signals to the subcarriers which are different in each of transmission paths; a fast Fourier transform (FFT) processor for separating the received reference signals; an interpolator for estimating reference signals of subcarrier to which the generated reference signals are not allocated by interpolating the subcarrier signals; and a calibration vector calculator for calculating the calibration vectors for the respective transmission oaths using the interpolated reference signals and the received reference signals.