CHANNEL FEEDBACK BASED ON REFERENCE SIGNAL Russian patent published in 2014 - IPC H04L1/00 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to techniques for reporting feedback to wireless communication channels. In one design, a cell transmits a cell-specific reference signal (CRS) used for channel estimation and coherent demodulation and a channel spatial information reference signal (CSI-RS) used for channel measurement and channel feedback reporting. The cell may transmit the CSI-RS less frequently than the CRS, or from more antenna ports than the CRS, or on fewer resource elements than the CRS, or any combination thereof. User equipment (UE) determines one bandwidth part configured for the UE, each bandwidth part covering at least one subband. The UE receives the CRS and CSI-RS from the cell, determines channel feedback information for at least one bandwidth part based on the CSI-RS, sends the channel feedback information to the cell, and receives data transmitted by the cell based on the channel feedback information.

EFFECT: improved performance due to downlink data transmission by having the UE measure the channel characteristics, determining channel feedback information based on the measured channel characteristics and sending the information to a base station.

48 cl, 11 dwg, 1 tbl