公开(公告)号：US20220337973A1

公开(公告)日：2022-10-20

申请号：US17659051

申请日：2022-04-13

申请人： ASOCS Ltd.

发明人： Vitaly Lutsky

IPC分类号： H04W4/029 ,  H04W56/00 ,  G01S5/02

摘要： Systems, methods, and software can provide high-accuracy position estimation for mobile user equipment (UE) configured for use within a service area covered by a plurality of radio units, e.g., O-RUs, with known position including coordinates. A channel estimate can be derived for a channel between a given UE and each of a plurality of radio units based on a sounding reference signal (SRS) received from the UE and used to select a subset of the radio units. The shortest delay can be calculated for the given UE to each O-RU in the subset, forming a set of uplink-time-difference-of-arrival (UL-TDOA) measurements; position of the given UE in the service area can be estimated based on the UL-TDOA measurements. The O-RU synchronization error can be estimated for each O-RU in the subset using estimated positions of the given UE and corresponding UL-TDOA measurements.