ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,911, issued on May 20, was assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (Stockholm).
"Signal precoding" was invented by Fredrik Athley (Vastra Frolunda, Sweden), Xinlin Zhang (Vastra Frolunda, Sweden) and Mattias Frenne (Uppsala, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method (700) for precoding a signal. The method includes determining (s702), based on uplink, UL, measurements, a spatial domain (SD) precoding vector and a frequency domain (FD) precoding vector for a downlink (DL) transmission of the signal. The method also includes applying (s704) the FD precoding vector to the signal over subcarriers for carrying the signal, ...