Invention Grant
- Patent Title: Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
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Application No.: US14105098Application Date: 2013-12-12
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Publication No.: US09699607B2Publication Date: 2017-07-04
- Inventor: Felix Markhovsky , Truman Prevatt
- Applicant: Invisitrack, Inc.
- Applicant Address: US TX Dallas
- Assignee: POLTE CORPORATION
- Current Assignee: POLTE CORPORATION
- Current Assignee Address: US TX Dallas
- Agency: Baker & Hostetler LLP
- Main IPC: G08B13/14
- IPC: G08B13/14 ; H04W4/02 ; H04W64/00 ; G01S3/46 ; G01S5/02 ; G01S5/14 ; H04L5/00 ; H04B7/0413

Abstract:
Methods for determining a LOB of one or more user equipment (UE) in a wireless system employing Time Difference of Arrival (TDOA) is described. TDOA techniques are based on estimating the difference in the arrival times of reference signals from multiple receivers or from multiple emitters to a receiver. A particular value of the time difference estimate defines a hyperbola between the two receivers on which the handset may exist. When the distance between the receiving antennas is small relative to the distance of the emitter source (the handset) being located, then the TDOA is equivalent to the angle between the baseline of the sensors (receivers antennas) and the incident RF energy from the emitter. If the angle between the baseline and true North is known, then the line of bearing (LOB) and/or angle of arrival (AoA), can be utilized to determine the location of the UE.
Public/Granted literature
- US20160366554A1 MULTI-PATH MITIGATION IN RANGEFINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY Public/Granted day:2016-12-15
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