APPARATUS AND METHOD FOR INTERFERENCE DECREASING IN MULTIPLE ANTENNA SYSTEMS

摘要

An apparatus and a method for reducing interference signals in a MIMO(Multi Input Multi Output) system are provided to obtain the maximum diversity gain by selecting an antenna group matrix having the maximum SINR(Signal to Interference Noise Ratio) and executing precoded space-time block coding. A receiving unit in a MIMO system which uses a precoded space-time block coding scheme comprises a channel estimator and a feedback controller(109). The channel estimator estimates the channel of a signal received from a transmitting unit. The feedback controller comprises an antenna group matrix creation part(201), a channel state confirmation part, and an antenna group matrix selection part(205). The antenna group matrix creation part creates group matrixes of antennas installed in the transmitting unit. The channel state confirmation part confirms the channel state of each of the antenna group matrixes. The antenna group matrix selection part selects an antenna group matrix showing the best channel state and feeds information about the selected antenna group matrix back to the transmitting unit.