Method for performing positioning operation on basis of ultra-wideband signal and electronic device supporting same

Patent metadata

Field	Value
Publication number	US-12196836-B2
Application number	US-202217960993-A
Country	US
Kind code	B2
Filing date	Oct 6, 2022
Priority date	Apr 22, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

An electronic device is provided. The electronic device includes an antenna and an ultra wide band (UWB) communication circuit connected with the antenna. The UWB communication circuit is configured to filter a positioning signal received from the antenna into a specified band to be converted into a digital signal, generate a UWB packet including a first field associated with synchronization and a second field associated with security, obtain a first channel impulse response corresponding to the first field and a second channel impulse response corresponding to the second field, when the UWB packet is valid based on the second field, obtain a third channel impulse response, when there is a correlation between the first channel impulse response and the second channel impulse response, and measure a distance to the external electronic device based on the third channel impulse response.

First claim

What is claimed is:

1. An electronic device comprising:
an antenna configured to transmit and receive a signal with an external electronic device; and
an ultra wide band (UWB) communication circuit connected with the antenna,
wherein the UWB communication circuit is configured to:
filter a positioning signal received from the antenna into a specified band to be converted into a digital signal,
generate a UWB packet including a first field associated with synchronization and a second field associated with security, based on the digital signal,
obtain a first channel impulse response corresponding to the first field and a second channel impulse response corresponding to the second field, when the UWB packet is valid based on the second field,
obtain a third channel impulse response corresponding to synthetic data in which data of the first field and data of the second field are synthesized with each other, when there is a correlation between the first channel impulse response and the second channel impulse response, and
measure a distance to the external electronic device based on the third channel impulse response.

2. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
compare the data of the second field with a previously stored reference code to determine that the UWB packet is valid, when the data of the second field and the reference code are the same as each other over a specified rate or a specified numerical number.

3. The electronic device of claim 2 , wherein the UWB communication circuit is further configured to:
discard the UWB packet, when the same portion between the data of the second field and the reference code is less than the specified rate or the specified numerical number.

4. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
determine a first path based on the third channel impulse response, and
calculate the distance to the external electronic device based on the first path.

5. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
generate the third channel impulse response corresponding to the synthetic data, when the correlation between the first channel impulse response and the second channel impulse response is greater than or equal to a reference value, and
measure the distance to the external electronic device based on the third channel impulse response.

6. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
generate the third channel impulse response corresponding to the synthetic data, when the same portion between the first channel impulse response and the second channel impulse response is greater than or equal to a specified rate or a specified numerical number, and
measure the distance to the external electronic device based on the third channel impulse response.

7. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
measure the distance to the external electronic device based on the second channel impulse response, when the correlation between the first channel impulse response and the second channel impulse response is less than a reference value.

8. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
measure the distance to the external electronic device based on the second channel impulse response, when the same portion between the first channel impulse response and the second channel impulse response is less than a specified rate or a specified numerical number.

9. The electronic device of claim 1 , wherein the UWB communication circuit is further configured to:
accumulate valid UWB packets,
arrange the accumulated UWB packets by means of a window, and
calculate the first channel impulse response and the second channel impulse response based on the data arranged by means of the window.

10. A positioning method based on an ultra wide band (UWB) signal to measure a distance to an external electronic device, the positioning method comprising:
filtering, by a UWB communication circuit, a positioning signal received from the external electronic device into a specified band to be converted into a digital signal;
generating, by the UWB communication circuit, a UWB packet including a first field associated with synchronization and a second field associated with security;
obtaining, by the UWB communication circuit, a first channel impulse response corresponding to the first field and a second channel impulse response corresponding to the second field, when the UWB packet is valid based on the second field;
obtaining, by the UWB communication circuit, a third channel impulse response corresponding to synthetic data in which data of the first field and data of the second field are synthesized with each other, when there is a correlation between the first channel impulse response and the second channel impulse response; and
measuring, by the UWB communication circuit, the distance to the external electronic device based on the third channel impulse response.

11. The positioning method of claim 10 , further comprising:
comparing the data of the second field with a previously stored reference code to determine that the UWB packet is valid, when the data of the second field and the reference code are the same as each other over a specified rate or a specified numerical number.

12. The positioning method of claim 11 , wherein the UWB packet is discarded, when the same portion between the data of the second field and the reference code is less than the specified rate or the specified numerical number.

13. The positioning method of claim 10 , wherein the measuring of the distance to the external electronic device includes:
determining a first path based on the third channel impulse response; and
calculating the distance to the external electronic device based on the first path.

14. The positioning method of claim 10 , wherein the obtaining of the third channel impulse response includes:
generating the third channel impulse response corresponding to the synthetic data, when the correlation between the first channel impulse response and the second channel impulse response is greater than or equal to a reference value.

15. The positioning method of claim 10 , further comprising:
measuring the distance to the external electronic device based on the second channel impulse response, when the correlation between the first channel impulse response and the second channel impulse response is less than a reference value.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hong Sukgi
• Choi Sehwan
• Kim Hyunchul
• Yang Yi
• Park Jungsik

Classifications

• G01S13/34

  using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal · CPC title

• G01S13/765

  with exchange of information between interrogator and responder · CPC title

• G01S11/02 Primary

  using radio waves (G01S19/00 takes precedence) · CPC title

• G01S13/0209 Primary

  Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband · CPC title