AoX multipath detection
AssigneeSilicon Laboratories Inc.
InventorsSauli Johannes Lehtimaki, Antonio Torrini, Mika Tapio Länsirinne
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Abstract
A system and method for detecting a multipath environment is disclosed. A first pseudospectrum based on azimuth angle and elevation angle is created. The result of this first pseudospectrum are used to create a second pseudospectrum based on polarization and field ratio. The sharpness of the results for these two pseudospectrums is determined and may be used to detect whether a multipath environment exists. If a multipath environment is believed to exist, the results from this device are ignored in determining the spatial position of the object.
Claims19
A method of determining a spatial position of a device, comprising:
- emitting a signal from the device;
- receiving the signal by a plurality of locator devices, each at a known location;
- calculating, for each of the plurality of locator devices, an angle of arrival of the signal, and at least one goodness value associated with the angle of arrival;
- and
- using a computational device to receive information from the plurality of locator devices, wherein the computation device uses at least two of the calculated angles of arrival and goodness values to determine the spatial position of the device,
- wherein a first pseudospectrum is calculated for each of the plurality of locator devices based on the signal to determine the angle of arrival, and wherein the angle of arrival is used to calculate a second pseudospectrum for each of the plurality of locator devices to determine a polarization ratio and polarization angle, and wherein the first pseudospectrum and the second pseudospectrum are used to generate the at least one goodness value for each of the plurality of locator devices.
A system for determining a spatial position of a device, comprising:
- a device, comprising a network interface having an antenna to emit a signal comprising a constant tone;
- a plurality of locator devices each at a known location, each locator device comprising a network interface and an antenna array;
- a processing unit and a memory device, wherein each locator device receives the signal, generates an I and Q signal for each antenna element in the antenna array, and wherein the I and Q signals are used to calculate an angle of arrival and at least one goodness value;
- and
- a computational device, wherein the computational device receives information from the plurality of locator devices and uses at least two of the calculated angles of arrival and goodness values to determine the spatial position of the device,
- wherein a first pseudospectrum is calculated for each of the plurality of locator devices based on the I and Q signals to determine the angle of arrival, and wherein the angle of arrival is used to calculate a second pseudospectrum for each of the plurality of locator devices to determine a polarization ratio and polarization angle, and wherein the first pseudospectrum and the second pseudospectrum are used to generate the at least one goodness value for each of the plurality of locator devices.
Dependencies are inferred from the claim text.