METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM

摘要

The present invention relates to a wireless communication system. A method for a terminal for transmitting channel state information (CSI) in a wireless communication system according to an embodiment of the present invention comprises the steps of: subsampling a first codebook associated with a first precoding matrix indicator (PMI) and a second codebook associated with a second PMI according to a reporting mode for a four-antenna port; and reporting the channel state information on the basis of the subsampled first codebook and second codebook, wherein a second codebook index for the second PMI may have any one index from a first index group if the first codebook index for the first PMI is an odd number, and if same is an even number, may have any one index from a second index group.

主权项

1. A method for transmitting channel state information (CSI) by a user equipment in a wireless communication system, the method comprising:
subsampling a first codebook associated with a first PMI (precoding matrix indicator) and a second codebook associated with a second PMI according to a reporting submode for 4 antenna ports; and reporting channel state information based on the subsampled first codebook and the second codebook, wherein if a first codebook index for the first PMI corresponds to an add number, a second codebook index for the second PMI has an index belonging to a first index group and wherein if the first codebook index corresponds to an even number, the second codebook index for the second PMI has an index belonging to a second index group.