METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION, METHOD AND DEVICE FOR OBTAINING CHANNEL STATE INFORMATION

摘要

A feedback method, obtaining method and device for channel state information are provided in the embodiments of this invention, wherein the feedback method for channel state information includes: the original channel state information of time domain is compressed by a user equipment to obtain the compressed channel state information of time domain; the compressed channel state information of time domain is quantized to obtain a codebook index; the codebook index is sent to a base station. The total spending, feeding back the channel state information from the user equipment to the base station, is reduced through the technical solutions provided in the embodiments of this invention.