Methods and apparatus for improved accuracy and positioning estimates
First Claim
Patent Images
1. A method for a range measurement between two devices, comprising:
- transmitting a first carrier signal from an antenna of a first device;
receiving the first carrier signal by a first antenna element of a second device;
receiving the first carrier signal by a second antenna element of the second device;
transmitting a second carrier signal from the first antenna element of the second device;
receiving the second carrier signal by the antenna of the first device;
determining a first phase estimate based on the first carrier signal received by the first antenna element;
determining a second phase estimate based on the first carrier signal received by the second antenna element;
determining a third phase estimate based on the second carrier signal received by the antenna of the first device; and
determining a residual range between the first device and the second device based on the first phase estimate, the second phase estimate, and the third phase estimate.
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Accused Products
Abstract
Disclosed are systems, devices and methods for determining a range estimate between two Bluetooth enabled devices based, at least in part, on round trip phase measurements of wireless signals transmitted between the devices. In one example, phase estimates between a single antenna of a first device and each element within the antenna array of a second device may be used to determine a residual range between the first device and the second device. In addition, an Angle of Arrival (AoA) may also be used to determine a two dimensional or three dimensional position of the second device.
20 Citations
14 Claims
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1. A method for a range measurement between two devices, comprising:
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transmitting a first carrier signal from an antenna of a first device; receiving the first carrier signal by a first antenna element of a second device; receiving the first carrier signal by a second antenna element of the second device; transmitting a second carrier signal from the first antenna element of the second device; receiving the second carrier signal by the antenna of the first device; determining a first phase estimate based on the first carrier signal received by the first antenna element; determining a second phase estimate based on the first carrier signal received by the second antenna element; determining a third phase estimate based on the second carrier signal received by the antenna of the first device; and determining a residual range between the first device and the second device based on the first phase estimate, the second phase estimate, and the third phase estimate. - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory computer-readable medium comprising instructions that when executed by a processor cause the processor to perform a method comprising:
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transmitting a first carrier signal from an antenna of a first device; receiving the first carrier signal by a first antenna element of a second device; receiving the first carrier signal by a second antenna element of the second device; transmitting a second carrier signal from the first antenna element of the second device; receiving the second carrier signal by the antenna of the first device; determining a first phase estimate based on the first carrier signal received by the first antenna element; determining a second phase estimate based on the first carrier signal received by the second antenna element; and determining a third phase estimate based on the second carrier signal received by the antenna of the first device; and determining a residual range between the first device and the second device based on the first phase estimate, the second phase estimate, and the third phase estimate. - View Dependent Claims (7, 8, 9)
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10. A wireless device for providing a range estimate, comprising:
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a memory; an antenna; a processor coupled to the memory and the antenna, the processor configured to; transmit a first carrier signal from an antenna of a first device; receive the first carrier signal by a first antenna element of a second device; receive the first carrier signal by a second antenna element of the second device; transmit a second carrier signal from the first antenna element of the second device; receive the second carrier signal by the antenna of the first device; determine a first phase estimate based on the first carrier signal received by the first antenna element; determine a second phase estimate based on the first carrier signal received by the second antenna element; determine a third phase estimate based on the second carrier signal received by the antenna of the first device; and determine a residual range between the first device and the second device based on the first phase estimate, the second phase estimate, and the third phase estimate. - View Dependent Claims (11, 12, 13, 14)
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Specification