Patent ID: 9608785
Date: 2017-03-28
CPC Classifications: H04B,H04L

Claim:
1. A method of estimating a channel by a user equipment in a wireless communication system, comprising: receiving a cell-specific reference signal (CRS) and a channel state information-reference signal (CSI-RS) from a base station; generating, by the user equipment, CSI based on a channel estimated using the CRS; reporting, by the user equipment, the generated CSI to the base station; and demodulating, by the user equipment, data based on the channel estimated using the CRS, wherein the CSI is generated based on a value obtained by applying a mapping relation matrix indicating a mapping relation between a CSI-RS port and a CRS port, which is the CRS is received through, wherein the generating, by the user equipment, CSI comprises: generating a first CSI based on the channel estimated using the CSI-RS; and generating a second CSI by modifying the first CSI based on the mapping relation between the CRS port and the CSI-RS port, and wherein the reporting the generated CSI comprises transmitting the second CSI.