ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,401,405, issued on Aug. 26, was assigned to SAMSUNG ELECTRONICS Co. Ltd. (Suwon-si, South Korea).
"Hierarchical beamforming and reciprocity calibration for hybrid MIMO systems" was invented by Chance Anthony Tarver (Arlington, Texas), Gang Xu (Allen, Texas), Shadi Abu-Surra (Plano, Texas), Won Suk Choi (McKinney, Texas), Young Han Nam (Plano, Texas) and Jianzhong Zhang (Dallas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hybrid MIMO system comprises N digital transceiver chains and N analog beamformers, each coupled to one of the digital transceiver chains and comprising M analog transmitter (TX) chains and M analog receiver (RX) chains. One of the ...