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System for location finding

  • US 10,536,920 B1
  • Filed: 01/11/2016
  • Issued: 01/14/2020
  • Est. Priority Date: 01/09/2015
  • Status: Active Grant
First Claim
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1. A system for locating a wireless communication asset within a network region, the system comprising:

  • a communication asset including a multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the communication asset exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes;

    a first sensor, the first sensor including a multi-mode antenna configurable in a plurality of modes, wherein the multi-mode antenna of the first sensor exhibits distinct radiation pattern characteristics when configured in each of the plurality of modes;

    a processor connected to the first sensor, the processor adapted to acquire and store information received at the first sensor;

    wherein the system is adapted to;

    configure the multi-mode antenna of the first sensor in a first mode of the plurality of modes of the multi-mode antenna of the first sensor and configure the multi-mode antenna of the communication asset in a first mode of the plurality of modes of the multi-mode antenna of the communication asset;

    with the multi-mode antenna of the first sensor in the first mode and with the multi-mode antenna of the communication asset in the first mode, sample the network region to obtain a first receive-signal from at least one of the first sensor or the communication asset within the network region, the first receive-signal comprising first information, wherein the first information includes amplitude data and phase data;

    store the first information;

    configure the multi-mode antenna of the first sensor in a second mode of the plurality of modes of the multi-mode antenna of the first sensor and configure the multi-mode antenna of the communication asset in a second mode of the plurality of modes of the multi-mode antenna of the communication asset;

    with the multi-mode antenna of the first sensor in the second mode and with the multi-mode antenna of the communication asset in the second mode, sample the network region to obtain a second receive-signal from at least one of the first sensor or the communication asset within the network region, the second receive-signal comprising second information, wherein the second information includes amplitude data and phase data;

    store the second information;

    determine a signal variation based at least in part on a difference between the first information and the second information;

    determine data associated with one or more potential locations of the communication asset within the network region based at least in part on a comparison of the signal variation to a priori knowledge of radiation pattern characteristics, the data associated with each of the potential locations comprising a direction and a distance to the communication asset; and

    eliminate, based at least in part on the comparison and based at least in part on the a priori knowledge of radiation pattern characteristics, one or more incorrect potential locations of the communication asset from the one or more potential locations of the communication asset.

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