A method and system for near field localization includes providing at least one transmitting antenna and at least a first and second set of receiving antennas, the first and second set of receiving antennas provided at a known distance R12 to each other and at a first radial distance r1 and second radial distance r2 from the transmitting antenna respectively. The first radial distance r1 is determined relative to the magnetic field strength proportional to a RSSI measurement and a first subtended angle θ1. The second radial distance r2 is determined relative to the magnetic field strength proportional to a RSSI measurement and a second subtended angle θ2. The theoretical magnetic field ratio dependent on θ1, θ2 and relative rotations θ2mod, θ1mod respectively is then determined and either of θ1 and θ2 or θ1mod and θ2mod; are solved and a set of solutions determined for the first subtended angle θ1 and second subtended angle θ2 which satisfies the orientation of the transmitting antenna thereby allowing determination of the direction of the transmitting antenna. For the set of solutions of the first subtended angle θ1 and second subtended angle θ2, the error between the RSSI and a theoretical magnetic field strength is minimized and one or more solutions that converge in response to movement of the transmitting antenna are selected.


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    Title :

    Method and system for near-field localization


    Contributors:

    Publication date :

    2020-10-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04B TRANSMISSION , Übertragung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / G01S RADIO DIRECTION-FINDING , Funkpeilung