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US 2023/0408665 A1Published application
Method for radio-based distance measurement
AssigneeLambda:4 Entwicklungen GmbH
InventorRönne REIMANN
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AssigneeLambda:4 Entwicklungen GmbH
InventorRönne REIMANN
Estimating the term…
A method for radio-based distance measurement in which, between time-synchronised objects, particularly during phase-coherent frequency change, an aggregation of autocorrelation matrices determined for each transmission direction leads to improved fault immunity. This ensures that frequency hopping of a first object followed by frequency hopping of a second object occurs. The method determines between two time-synchronised objects and wherein a first and/or a second of the two objects emit signals at a plurality of frequencies and the distance between the first and the second object is determined. The method includes the formation of a first and a second autocorrelation matrix of the measurements and the aggregation of the first and the second autocorrelation matrix to form an aggregated autocorrelation matrix. The distance between the objects is calculated on the basis of the aggregated autocorrelation matrix.
A method for determining a distance between at least two objects, wherein the at least two objects are or will be time- or clock-cycle-synchronized, and wherein a first object and a second object of the at least two objects emit signals at multiple frequencies, and the second object and the first object of the at least two objects receive the signals of the respectively other of the first object and the second object, and the distance between the first object and the second object is determined therefrom, wherein the method includes forming a first autocorrelation matrix of measurements on the signals of the first object received at the second object, and forming a second autocorrelation matrix of measurements on the signals of the second object received at the first object, as well as aggregating the first autocorrelation matrix and the second autocorrelation matrix into an aggregated autocorrelation matrix and in that the distance between the first object and the second object is calculated on the basis of the aggregated autocorrelation matrix.
A use of an autocorrelation matrix aggregated from at least two autocorrelation matrices for determining a distance between two objects, wherein each of the two objects emits signals at multiple frequencies and the respectively other of the two objects receives the emitted signals, and at least one complex vector of the reception of the emitted signals is created from measurements of phase and amplitude, or phase and power, and one of the at least two autocorrelation matrices is created from the at least one complex vector of each object of the two objects.
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