| 摘要 |
<p>A CSI feedback method and device, including: acquiring a code identifier; acquiring a code parameter group corresponding to the code identifier from multiple preset code parameter groups; compressing an initial CSI according to the code parameter group to generate a compressed CSI, wherein the initial CSI is acquired by measuring a current downlink channel of a base station; and feeding back the compressed CSI to the base station, wherein the compressed CSI is used for reestablishment according to the code parameter group by the base station to obtain an initial CSI for next data sending of the base station. In the present invention, a coding mode of the CSI fed back to the base station by the UE is adjusted in real time according to the downlink performance of the current base station and the state of an uplink channel from the base station to the UE, so that the precision of the CSI fed back by the UE may be adaptively modified according to the uplink and downlink communication conditions of the current base station, thus optimizing the data transmission capability of a system.</p> |
