ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,431,950, issued on Sept. 30, was assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT Co. LTD. (Beijing).

"Channel reciprocity-based precoding matrix configuration method and apparatus" was invented by Zhengxuan Liu (Beijing), Qiubin Gao (Beijing) and Hui Li (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a channel reciprocity-based precoding matrix configuration method and apparatus. The method includes in downlink transmission, a network side separately sends, on each antenna port associated with each transmission layer, a CSI-RS subjected to beamforming to a terminal by using beams calculated according to angle information and de...