METHOD AND DEVICE FOR OBTAINING DOWNLINK CHANNEL STATUS INFORMATION

摘要

A technical solution for a base station obtaining channel status information of all downlinks is provided in the present invention. Wherein, for a downlink wireless communication link, which is from a base station to an antenna sending uplink reference signal of a user terminal, according to reciprocity of a Time Division Duplex wireless communication system, the base station obtains the channel status information for the downlink wireless communication link based on the received uplink reference signal; and for a downlink wireless communication link, which is from the base station to the antenna receiving signal only without sending signal of the user terminal, the user terminal determines a precoding matrix called the part precoding matrix, and sends the indicator of the precoding matrix to the base station; so that the base station is enabled to obtain the channel status information for all of the downlink wireless communication links.