Wireless device, network node and methods performed therein for time of arrival estimation

Patent metadata

Field	Value
Publication number	US-12108356-B2
Application number	US-202017421452-A
Country	US
Kind code	B2
Filing date	Jan 12, 2020
Priority date	Jan 11, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A method, system and apparatus are disclosed. In one or more embodiments, a method in a wireless device is provided. The wireless device is configured to communicate with a network node. The wireless device receives an extended signal transmitted by the network node. The extended signal includes a base signal and at least one additional signal. The wireless device estimates a time of arrival, TOA, based on the extended signal.

First claim

What is claimed is:

1. A method implemented in a network node configured to communicate with a wireless device, WD, the method comprising:
configuring an extended signal that includes a base signal and at least one additional signal, the extended signal being used for estimation of time of arrival, TOA, at the wireless device, the estimation of the TOA further including at least one of:
correlating the received extended signal with a known combined signal and identify the delay of the earliest non-aliased peak in the correlation to determine the estimated TOA; and
dividing the received extended signal by the known combined signal;
performing an inverse Discrete Fourier Transform (DFT) on the result of the division to determine a channel impulse response; and
identifying a delay of an earliest non-aliased peak in the channel impulse response to determine the estimated TOA; and

transmitting the extended signal to the WD.

2. The method of claim 1 , wherein the network node being configured to communicate with a wireless device further comprises at least one of: the network node transmitting the extended signal via a radio interface and the network node signaling the configuration of the extended signal to one of the wireless device and another network node.

3. The method of claim 1 , further comprising transmitting a known combined signal to the WD for comparison to the extended signal.

4. A wireless device, WD, configured to communicate with a network node, the WD including:
a radio interface configured to receive an extended signal that includes a base signal and at least one additional signal; and
processing circuitry configured to estimate a time of arrival, TOA, based on the extended signal, the processing circuitry being configured to estimate the TOA further including at least one of:
correlate the received extended signal with a known combined signal and identify the delay of the earliest non-aliased peak in the correlation to determine the estimated TOA; and
divide the received extended signal by the known combined signal;
perform an inverse Discrete Fourier Transform (DFT) on the result of the division to determine a channel impulse response; and

identify a delay of an earliest non-aliased peak in the channel impulse response to determine the estimated TOA.

5. The WD of claim 4 , wherein a configuration of the at least one additional signal depends on a configuration of the base signal.

6. The WD of claim 4 , wherein receiving the extended signal via the radio interface includes receiving the extended signal from a positioning node.

7. The WD of claim 4 , wherein the base signal is a tracking reference signal, TRS.

8. The WD of claim 4 , wherein the at least one additional signal is configured in the same at least one slot as the base signal with at least one different symbol position.

9. The WD of claim 4 , wherein the processing circuitry being configured to estimate the TOA includes the processing circuitry being configured to add, in the time domain, symbols of the base signal and symbols of the at least one additional signal.

10. The WD of claim 4 , wherein the WD is configured to receive the known combined signal from the network node.

11. A method implemented in a wireless device WD configured to communicate with a network node, the method comprising:
receiving an extended signal that includes a base signal and at least one additional signal; and
estimating a time of arrival, TOA, based on the extended signal, the estimating the TOA further including at least one of:
correlating the received extended signal with a known combined signal and identify the delay of the earliest non-aliased peak in the correlation to determine the estimated TOA; and
dividing the received extended signal by the known combined signal;
performing an inverse Discrete Fourier Transform (DFT) on the result of the division to determine a channel impulse response; and
identifying a delay of an earliest non-aliased peak in the channel impulse response to determine the estimated TOA.

12. The method of claim 11 , wherein a configuration of the at least one additional signal depends on a configuration of the base signal.

13. The method of claim 11 , wherein receiving the extended signal via the radio interface includes receiving the extended signal from a positioning node.

14. The method of claim 11 , wherein the base signal is a tracking reference signal, TRS.

15. The method of claim 11 , wherein the at least one additional signal is configured in the same at least one slot as the base signal with at least one different symbol position.

16. The method of claim 11 , wherein the estimating of the TOA includes adding, in the time domain, symbols of the base signal and symbols of the at least one additional signal.

17. The method of claim 11 , wherein the known combined signal is received from the network node.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Ernström Per
• Stare Erik
• Gunnarsson Fredrik
• Munier Florent
• Nygren Johannes
• Dwivedi Satyam
• Siomina Iana
• Shrestha Deep

Classifications

• H04W64/006

  with additional information processing, e.g. for direction or speed determination · CPC title

• H04L25/0224

  using sounding signals · CPC title

• H04L25/0212

  of impulse response · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• G01S5/0221

  Receivers · CPC title