METHOD AND DEVICE FOR PERFORMING CHANNEL ESTIMATION

摘要

A method for reporting a channel state on a downlink channel transmitted through M antenna ports that are 2-dimensionally arranged according to an embodiment of the present invention may be performed by a terminal and include a step of receiving a channel state information-reference signal (CSI-RS) setting for N virtual antenna ports that are formed by applying beam-forming to a group of vertical antennas of the 2-dimensionally arranged M antenna ports, and a step of calculating channel state information on the downlink channel by using the received CSI-RS setting to report the channel state information to a serving cell, wherein the reported channel state information may include information on a rotational transformation related to a first code word of a codebook related to a combination of Q unit vectors that are orthogonal in an N dimension space.

主权项

1. A method for performing channel state reporting on a downlink channel transmitted through M two-dimensionally arranged antenna ports, the method being implemented by a terminal and comprising:
receiving a channel state information-reference signal (CSI-RS) configuration for N virtual antenna ports formed by applying beamforming to each vertical antenna group of the M two-dimensionally arranged antenna ports; and calculating channel state information (CSI) about the downlink channel using the received CSI-RS configuration and reporting the same to a serving cell, wherein the reported CSI comprises information about rotational transformation of a first codeword in a codebook for a combination of Q unit vectors orthogonal to each other in an N-dimensional space.