US 11,237,244 B2Granted

Measuring angle of arrival on a constant and/or pre-known part of a BLE packet

AssigneesDENSO International America, Inc., Denso Corporation

InventorsKarl Jager, Raymond Michael Stitt

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Abstract

A system and method are disclosed and include receiving a wireless signal. The method includes generating a first and second set of digital data that are representative of the wireless signal. The method includes obtaining a first and second sample that is representative of a cosine and sine component, respectively, of a pre-known portion of the first set. The method includes obtaining a third and fourth sample that is representative of a cosine and sine component, respectively, of a pre-known portion of the second set. The method includes determining a first phase angle value based on an amplitude of the first and second samples and a second phase angle based on an amplitude of the third and fourth samples. The method includes determining an angle of arrival based on a difference between the first and second phase angle values.

Claims22

Dependent claims

A method comprising:

receiving, using a plurality of antennas, a wireless signal comprising a packet, wherein the packet includes data with a pre-known portion, and wherein the pre-known portion of the packet is known prior to receiving the packet;
generating, using at least one of a transceiver or a microcontroller, (i) a first set of digital data that is representative of the pre-known portion received using a first antenna of the plurality of antennas, and (ii) a second set of digital data that is representative of the pre-known portion received using a second antenna of the plurality of antennas;
obtaining, using the microcontroller, (i) a first sample that is representative of a cosine component of the pre-known portion of the first set of digital data, and (ii) a second sample that is representative of a sine component of the pre-known portion of the first set of digital data;
obtaining, using the microcontroller, (i) a third sample that is representative of a cosine component of the pre-known portion of the second set of digital data, and (ii) a fourth sample that is representative of a sine component of the pre-known portion of the second set of digital data;
determining, using a processor of the microcontroller, (i) a first phase angle value associated with the first antenna based on an amplitude of the first sample and an amplitude of the second sample, and (ii) a second phase angle value associated with the second antenna based on an amplitude of the third sample and an amplitude of the fourth sample, wherein the processor is configured to execute instructions stored in a non-transitory computer-readable memory;
and
determining, using the processor, an angle of arrival based on a difference between the first phase angle value and the second phase angle value.

4 more elements

A system comprising:

a plurality of antennas configured to receive a wireless signal comprising a packet, wherein the packet includes data with a pre-known portion, and wherein the pre-known portion of the packet is known prior to receiving the packet;
a transceiver configured to generate (i) a first set of digital data that is representative of the pre-known portion received using a first antenna of the plurality of antennas, and (ii) a second set of digital data that is representative of the pre-known portion received using a second antenna of the plurality of antennas;
and
a microcontroller is configured to
obtain (i) a first sample that is representative of a cosine component of the pre-known portion of the first set of digital data, and (ii) a second sample that is representative of a sine component of the pre-known portion of the first set of digital data, and
obtain (i) a third sample that is representative of a cosine component of the pre-known portion of the second set of digital data, and (ii) a fourth sample that is representative of a sine component of the pre-known portion of the second set of digital data,
wherein the microcontroller includes a processor configured to execute instructions stored in a non-transitory computer-readable memory, and wherein the instructions include
determining (i) a first phase angle value associated with the first antenna based on an amplitude of the first sample and an amplitude of the second sample, and (ii) a second phase angle value associated with the second antenna based on an amplitude of the third sample and an amplitude of the fourth sample, and
determining an angle of arrival based on a difference between the first phase angle value and the second phase angle value.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/504,488Filed 8 Jul 2019 · us provisional application
Priority: 13 Jul 2018
Published: US 2020/0018818 A116 Jan 2020
Granted: 1 Feb 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G01S 5/10
Using radio waves: position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega…
G01S 3/043
Details: receivers
G01S 3/465
Using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems: the waves arriving at…
G01S 3/48
Using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems: the waves arriving at…