ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,395,252, issued on Aug. 19, was assigned to NEC Corp. (Tokyo).
"Active antenna system and method thereof" was invented by Takuji Mochizuki (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A controller performs an intra-subunit transmission calibration to compensate for relative differences in amplitude and phase among multiple transmitter RF chains within each subunit of an active antenna system (AAS). The controller further performs inter-subunit transmission calibration to compensate for relative differences in amplitude and phase among multiple representative transmitter RF chains, each included in a respective one of the multiple subunits."
Th...