Method and device for determining arrival time, terminal device, and storage medium
AssigneeZte Corporation
InventorsShijun Chen, Dawei Chen, Yang Wang, Junqiang Li, Qian Chen
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Abstract
A method and device for determining a time of arrival (TOA), a terminal device, and a non-transitory computer-readable storage medium are disclosed. The method may include: determining a detection start time on a correlation waveform based on a leading edge detection threshold; determining a noise threshold on the correlation waveform, and determining a quasi-TOA according to the detection start time; and determining the TOA according to data information in a target area of the correlation waveform and the noise threshold, where the target area is determined based on the quasi-TOA and a detection length.
Claims13
A method for determining a time of arrival (TOA), applied to a positioning terminal device in a wireless communication system, comprising:
- receiving a positioning signal from a base station in the wireless communication system;
- performing a mathematical correlation operation on the positioning signal and a local signal to obtain a correlation waveform;
- determining a detection start time on the correlation waveform based on a leading edge detection threshold;
- determining a noise threshold on the correlation waveform, and determining a quasi-TOA according to the detection start time;
- and
- determining the TOA according to data information in a target area of the correlation waveform and the noise threshold,
- wherein the target area is determined based on the quasi-TOA and a detection length;
- wherein determining the TOA according to data information in a target area of the correlation waveform and the noise threshold comprises:
- determining the data information in the target area of the correlation waveform, the data information comprising:
- at least one of the following attributes of a maximum data point:
- amplitude;
- amplitude change rate;
- or time, the maximum data point being a data point with a largest amplitude in the target area of the correlation waveform;
- determining the quasi-TOA as the TOA in response to the amplitude of the maximum data point being not greater than the noise threshold;
- and
- updating the quasi-TOA in response to the amplitude of the maximum data point being greater than the noise threshold, until no amplitude greater than the noise threshold exists in a target area corresponding to the updated quasi-TOA, and determining the updated quasi-TOA as the TOA.
A positioning terminal device in a wireless communication system, comprising:
- at least one processor;
- and
- a storage apparatus, configured to store at least one program, wherein
- the at least one program, when executed by the at least one processor, causes the at least one processor to implement a method for determining a time of arrival (TOA) comprising:
- receiving a positioning signal from a base station in the wireless communication system;
- performing a mathematical correlation operation on the positioning signal and a local signal to obtain a correlation waveform;
- determining a detection start time on the correlation waveform based on a leading edge detection threshold;
- determining a noise threshold on the correlation waveform, and determining a quasi-TOA according to the detection start time;
- and
- determining the TOA according to data information in a target area of the correlation waveform and the noise threshold, wherein the target area is determined based on the quasi-TOA and a detection length;
- wherein determining the TOA according to data information in a target area of the correlation waveform and the noise threshold comprises:
- determining the data information in the target area of the correlation waveform, the data information comprising:
- at least one of the following attributes of a maximum data point:
- amplitude;
- amplitude change rate;
- or time, the maximum data point being a data point with a largest amplitude in the target area of the correlation waveform;
- determining the quasi-TOA as the TOA in response to the amplitude of the maximum data point being not greater than the noise threshold;
- and
- updating the quasi-TOA in response to the amplitude of the maximum data point being greater than the noise threshold, until no amplitude greater than the noise threshold exists in a target area corresponding to the updated quasi-TOA, and determining the updated quasi-TOA as the TOA.
Dependencies are inferred from the claim text.