METHOD AND DEVICE FOR EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS

摘要

The present invention relates to a wireless communication system, and more particularly, discloses a method and a device for efficient feedback in a wireless communication system supporting multiple antennas. According to one embodiment of the present invention, the method for transmitting channel status information on a downlink transmission through an uplink, in the wireless communication system, comprises the following steps: transmitting a rank indicator (RI) and a precoding type indicator (PTI) based on a first reporting period, when the PTI has a first value; transmitting during the first reporting period a broadband first precoding matrix indicator (PMI) based on a second reporting period; transmitting at least once during the second reporting period a broadband second PMI and a broadband channel quality indicator (CQI); transmitting the rank indicator (RI) and the PTI based on the first reporting period, when the PTI has a second value; transmitting during the first reporting period the broadband second PMI and the broadband CQI based on a third reporting period; and transmitting at least once during the third period a subband second PMI and a subband CQI, wherein the subband CQI on an entire cycle of a set bandwidth portion (BP) can be transmitted at least once.