METHOD AND APPARATUS FOR DETERMINING THE CHANGING POSITION OF A MOBILE TRANSMITTER
First Claim
1. A method for determining the changing position of a mobile transmitter in a three-dimensional space comprising the following steps:
- transmitting signals at a preset frequency by the mobile transmitter;
receiving the transmitted signals by a plurality of receivers; and
evaluating the received signals and preparing correlation curves of correlation between transmitted signals and received signals, wherein the curves include absolute value graphs over time;
determining time of arrival (TOA) values from the absolute value graphs at a characteristic point,wherein the evaluation step includes preparing of correlation curves as graphs in a complex plane and, furthermore, the following steps are provided;
determining phase values from the graphs in the complex plane using the time information of the TOA values and the angular orientation of the characteristic point in the graphs of the correlation curves in the complex plane; and
calculating the position of the mobile transmitter while taking account of the TOA values and the phase values.
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Abstract
A method and a device for determining the changing position of a mobile transmitter in a three-dimensional space is proposed in which transmitted signals are issued at a pre-determined frequency from a mobile transmitter, wherein a plurality of receivers receive said transmitted signals. An evaluation device evaluates the received signals for generating correlation curves between the transmitted and the received signals. From the curves of magnitude versus time, TOA values are determined, and from curves in the complex plane, phase values are determined using the time information from the TOA values. The position of the mobile transmitter is calculated as a function of TOA values and of phase or phase difference values.
7 Citations
20 Claims
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1. A method for determining the changing position of a mobile transmitter in a three-dimensional space comprising the following steps:
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transmitting signals at a preset frequency by the mobile transmitter; receiving the transmitted signals by a plurality of receivers; and evaluating the received signals and preparing correlation curves of correlation between transmitted signals and received signals, wherein the curves include absolute value graphs over time; determining time of arrival (TOA) values from the absolute value graphs at a characteristic point, wherein the evaluation step includes preparing of correlation curves as graphs in a complex plane and, furthermore, the following steps are provided; determining phase values from the graphs in the complex plane using the time information of the TOA values and the angular orientation of the characteristic point in the graphs of the correlation curves in the complex plane; and calculating the position of the mobile transmitter while taking account of the TOA values and the phase values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19, 20)
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9. An apparatus for determining the changing position of a mobile transmitter in a three-dimensional space, the apparatus comprising:
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a plurality of receivers for receiving the transmitted signals which are output by the mobile transmitter and which have a preset frequency an evaluation device for preparing correlation curves of correlation between transmitted signals and received signals, wherein the correlation curves include absolute value graphs over time for determining time of arrival (TOA) values from the absolute value graphs at a characteristic point; and wherein the evaluation device is configured to prepare correlation curves as graphs in the complex plane, to determine phase values from the graphs in the complex plane using the time information of the TOA values for each receiver and the angular orientation of the characteristic point in the graphs of the correlation curves in the complex plane and to calculate the position of the mobile transmitter while taking account of the TOA values and of the phase values. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification