公开(公告)号：EP2638405A2

公开(公告)日：2013-09-18

申请号：EP11840035.7

申请日：2011-11-14

申请人： Nextnav, LLC

发明人： WOLF, Tom ,  RAGHUPATHY, Arun ,  SENDONARIS, Andrew ,  MEIYAPPAN, Subramanian ,  PATTABIRAMAN, Ganesh ,  TANG, Haochen ,  VAJJHALA, Prasad ,  SINGH, Rajendra

IPC分类号： G01R5/08

CPC分类号： G01S5/0257 ,  G01S19/45

摘要： Positioning systems and methods comprise a network of transmitters that broadcast positioning signals comprising ranging signals and positioning system information. A ranging signal comprises information used to measure a distance to a transmitter broadcasting the ranging signal. A reference sensor array comprising at least one reference sensor unit is positioned at a known location. A remote receiver includes an atmospheric sensor collecting atmospheric data at a position of the remote receiver. A positioning application is coupled to the remote receiver and generates a reference pressure estimate at the position of the remote receiver using the atmospheric and reference data from the reference sensor array. The positioning application computes the position of the remote receiver using the reference pressure estimate and information derived from at least one of the positioning signals and satellite signals that are signals of a satellite-based positioning system. The position includes an elevation.

公开(公告)号：EP2954740B1

公开(公告)日：2019-05-29

申请号：EP14717001.3

申请日：2014-03-05

申请人： Telcom Ventures, LLC ,  Nextnav, LLC

发明人： SINGH, Rajendra ,  OLEXA, George Ron ,  PARSONS, Gary

IPC分类号： H04W64/00

公开(公告)号：EP2954740A1

公开(公告)日：2015-12-16

申请号：EP14717001.3

申请日：2014-03-05

申请人： Telcom Ventures, L.L.C. ,  Nextnav, LLC

发明人： SINGH, Rajendra ,  OLEXA, George Ron ,  PARSONS, Gary

IPC分类号： H04W64/00

CPC分类号： H04W56/0015 ,  G01S5/021 ,  H04W56/0055 ,  H04W64/00

摘要： Methods of operating a position network center, which includes at least one server, may include receiving timing-error data corresponding to a plurality of unsynchronized or loosely synchronized transmitters from at least one position network receiver. Moreover, the methods may include transmitting data indicating a plurality of timing errors by the plurality of unsynchronized or loosely synchronized transmitters to a wireless user device that receives signals from the plurality of unsynchronized or loosely synchronized transmitters. Related position network centers, position network receivers, and wireless user devices are also described.