Invention Grant
US08838137B2 Estimating the location of a wireless terminal in wireless telecommunications systems that comprise distributed and/or repeater antennas 有权
估计无线终端在包括分布式和/或中继器天线的无线电信系统中的位置

Estimating the location of a wireless terminal in wireless telecommunications systems that comprise distributed and/or repeater antennas
Abstract:
A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are location-dependent traits of electromagnetic signals. In environments where multiple antennas are radiating the same signal, as in the case of distributed antennas or host-repeater configurations, one or more possible locations of the wireless terminal can be designated as improbable based on i) a measure of the propagation delay of a signal traveling between a) a base station and b) the wireless terminal or an infrastructure antenna, or ii) the maximum distance at which a signal is detectable by the wireless terminal. Additionally, the applicable set of values for the location-dependent traits is selected based on similar criteria.
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