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Object tracking via radio reflections

A target tracking and target technology, applied in the field of target tracking through radio reflection, can solve problems such as limited accuracy, computational complexity, confidentiality issues, and cost

Inactive Publication Date: 2016-12-14
MASSACHUSETTS INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each of these alternative techniques suffers from limited accuracy, computational complexity, security issues, and / or cost of application

Method used

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  • Object tracking via radio reflections
  • Object tracking via radio reflections
  • Object tracking via radio reflections

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] refer to figure 1 A first embodiment of the motion tracking system 100 uses multiple antennas 150 to transmit and receive radio frequency signals reflected from objects (e.g., people) in the system's environment, which may include one or more rooms of a building, The interior of a vehicle, etc., and the system may be separated by a substantially radiation-transparent barrier, such as a building wall or a sheet of cloth. Generally, objects in the environment include not only fixed objects such as chairs and walls, but also moving objects such as but not limited to people. The system can track people who can move around the room, or who can be relatively stationary (e.g., lying on a bed or sitting in a chair), but still exhibit Breathing motion detected by one or more embodiments. The system provides motion analysis results 130 based on radio frequency signals. In various embodiments, these results include the location of one or more persons in the environment, detecte...

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PUM

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Abstract

In one aspect, a reference transmit signal is distributed to each of one or more transmit antennas, and delayed by multiple different times before transmission from the transmit antennas. The reference transmit signal (or a delayed version of the reference signal) is also used at each of the receive antennas to determine propagation (time of flight) times reflecting from bodies from each of the transmit antennas to the receive antenna. In another aspect, locations of multiple objects are determined by iteratively (a) determining a location of a body based on determined propagation times between multiple transmitter-receiver pairs, and (b) having determined a location, effectively removing the effect of reflections from that location from the remaining signals.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation of U.S. Application Serial No. 14 / 510,263, entitled "MOTION TRACKING VIA BODY RADIOREFLECTIONS," filed October 9, 2014, and calls for filing February 24, 2014 U.S. Provisional Application No. 61 / 943,957, entitled "MULTI-PERSON MOTION TRACKING VIA BODY RADIOREFLECTIONS (MULTI-PERSON MOTION TRACKING VIA BODY RADIO REFLECTIONS)" and filed April 28, 2014, entitled "MULTI-PERSON MOTION TRACKING Priority of U.S. Provisional Application No. 61 / 985,066 for VIA BODY RADIOREFLECTIONS (Multiplayer Motion Tracking by Radio Reflections)". [0003] The applications cited above are hereby incorporated by reference. [0004] Statement Regarding Federally Funded Research [0005] This invention was made with Government Support No. CNS-1117194 awarded by the National Science Foundation. The government has certain rights in this invention. technical field [0006] The present invention relates to trac...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/00G01S13/72G01S13/87G01S13/88G06F3/01
CPCG01S7/415G01S13/003G01S13/72G01S13/878G01S13/88G06F3/017G01S7/35G01S7/354G01S13/343G01S13/584G01S13/726G01S13/42
Inventor 法德尔·阿迪布扎卡里·爱德华·卡贝莱克迪纳·卡塔比
Owner MASSACHUSETTS INST OF TECH
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