公开(公告)号：EP2943744A1

公开(公告)日：2015-11-18

申请号：EP13821646.0

申请日：2013-12-31

申请人： Qualcomm Incorporated

发明人： WACHTER, Andreas, Klaus ,  BURROUGHS, Kirk, Allan ,  GARIN, Lionel, Jacques ,  EDGE, Stephen, William ,  WILSON, Bruce, Everett ,  PUIG, Carlos, Manuel

IPC分类号： G01C5/06

CPC分类号： G01C5/06

摘要： Systems, apparatus and methods for populating and using a pressure database to determine an altitude of a unit with an unknown altitude are presented. A pressure from one or more barometric pressure sensors linked to respective base stations are interpolated to determine a reference pressure (e.g., at sea level) at arbitrary coordinates (x,y) having pressure reading. For example, a mobile station at the arbitrary coordinates (x,y) records a pressure at the mobile station. A difference between this pressure at the mobile station and the interpolated reference pressure is determined, which may directly be interpreted as a defined altitude of the mobile station.