Pseudo-spectrum averaging for angle of arrival detection
AssigneeSilicon Laboratories Inc.
InventorSauli Johannes Lehtimaki
Life of this patent
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Abstract
A system and method for determining a direction of arrival of an incoming signal is disclosed. The present system utilizes a plurality of pseudo-spectrums to create a more accurate result matrix. The pseudo-spectrums are one or two dimensional arrays, where peaks in the arrays are indicative of the angle of arrival. A result matrix is generated by performing a mathematical operation of corresponding elements in each pseudo-spectrum. This mathematical operation may be addition or multiplication. The result matrix provides a more accurate indication of the angle of arrival than can otherwise by achieved. In some embodiments, a measure of quality may also be calculated for the result matrix.
Claims20
A method of improving the accuracy of an angle of arrival or an angle of departure algorithm, wherein the algorithm is used to determine an angle of arrival or angle of departure of radio frequency signals, comprising:
- executing the angle of arrival or angle of departure algorithm a plurality of times so as to create a plurality of pseudo-spectrums, wherein the pseudo-spectrums comprise one or two dimensional arrays;
- performing a mathematical operation on the plurality of pseudo-spectrums to produce a result matrix;
- and
- determining the angle of arrival or angle of departure of the radio frequency signals based on the result matrix, wherein the mathematical operation improves the accuracy of the angle of arrival or angle of departure algorithm.
A locator device, comprising:
- a one or two dimensional antenna array;
- a wireless receiver in communication with the antenna array;
- a processing unit;
- and
- a memory device in communication with the processing unit, further comprising instructions, which when executed by the processing unit, enable the locator device to:
- generate a plurality of pseudo-spectrums based on incoming signals received by the wireless receiver, using an angle of arrival algorithm;
- perform a mathematical operation on the plurality of pseudo-spectrums to create a result matrix;
- and
- determine an angle of arrival from the result matrix, wherein the mathematical operation improves the accuracy of the angle of arrival algorithm.
A device, comprising:
- an antenna;
- a wireless receiver in communication with the antenna;
- a processing unit;
- and
- a memory device in communication with the processing unit, further comprising instructions, which when executed by the processing unit, enable the device to:
- generate a plurality of pseudo-spectrums based on incoming signals received by the wireless receiver, using an angle of departure algorithm;
- perform a mathematical operation on the plurality of pseudo-spectrums to create a result matrix;
- and
- determine an angle of departure from the result matrix, wherein the mathematical operation improves the accuracy of the angle of departure algorithm.
Dependencies are inferred from the claim text.