CN-122029905-A - Positioning method, equipment and device

CN122029905ACN 122029905 ACN122029905 ACN 122029905ACN-122029905-A

Abstract

The embodiment of the application provides a positioning method, equipment and a device, which relate to the technical field of communication and are applied to positioning equipment, wherein the method comprises the steps of acquiring CIR of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sampling points; selecting a reference sample point from a plurality of sample points according to the amplitude of each sample point, wherein the amplitude of the reference sample point is larger than a preset standard, calculating a reference phase based on the reference sample point, carrying out phase alignment on the plurality of sample points based on the reference phase to obtain CIR after phase alignment, inputting the CIR after phase alignment into a positioning model, and obtaining positioning information output by the positioning model. The scheme provided by the embodiment of the application can be used for carrying out phase alignment on the CIR so as to eliminate the problem of random initial phase mismatch of the CIR, thereby improving the positioning accuracy of the positioning model.

Inventors

ZHANG LI
HU XI
ZHOU LEI

Assignees

新华三技术有限公司

Dates

Publication Date: 20260512
Application Date: 20240912

Claims (20)

A positioning method, applied to a positioning device, the method comprising: acquiring a Channel Impulse Response (CIR) of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sampling points; Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points, wherein the amplitude of the reference sample point is larger than a preset standard; calculating a reference phase based on the reference sample point; Performing phase alignment on the plurality of sampling points based on the reference phase to obtain CIR after phase alignment; And inputting the CIR after phase alignment into a positioning model, and obtaining positioning information output by the positioning model.
The method of claim 1, wherein selecting a reference sample from the plurality of samples based on the magnitude of each of the plurality of samples comprises: Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points by adopting a first algorithm or a second algorithm; The first algorithm is to select a sample point with the largest amplitude from a plurality of sample points as the reference sample point, and the second algorithm is to select a first sample point higher than an amplitude threshold from the plurality of sample points as the reference sample point, wherein the amplitude threshold is a preset multiple of the noise standard deviation of the CIR; the calculating a reference phase based on the reference sample point includes: calculating a reference phase based on the reference sample point by adopting a third algorithm or a fourth algorithm; Calculating an average value of phases of all sample points in a sample point set as a reference phase, wherein the sample point set comprises a plurality of continuous sample points from the reference sample point; The fourth algorithm is that for each alternative angle in a plurality of alternative angles, the sum of imaginary parts of sampling points in the sampling point set after the phase of the sampling points in the sampling point set is rotated by the alternative angle is calculated, and the alternative angle with the minimum sum of the imaginary parts is selected as a reference phase.
The method according to claim 2, wherein when the positioning device is a first terminal or a first base station, before the acquiring the channel impulse response CIR of the channel between the terminal to be positioned and the base station, further comprising: receiving a first signaling sent by a Location Management Function (LMF) device, wherein the first signaling comprises a first mark value and a second mark value, the first mark value represents an algorithm for selecting the reference sample point, and the second mark value represents an algorithm for calculating the reference phase; the selecting a reference sample from the plurality of samples according to the magnitude of each of the plurality of samples comprises: selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points by adopting an algorithm represented by the first mark value; the calculating a reference phase based on the reference sample point includes: and calculating a reference phase based on the reference sample point by adopting an algorithm represented by the second mark value.
A method according to claim 3, characterized in that the first signaling further comprises a first parameter representing the number of samples used for calculating the reference phase; In the case that the first flag value indicates a second algorithm, the first signaling further includes a second parameter, where the second parameter is used to indicate the preset multiple; In case the second flag value represents a fourth algorithm, the first signaling further comprises a third parameter for representing a minimum interval between the alternative angles.
The method of claim 3, wherein the first marker value represents one of the algorithms supported by the positioning device for selecting the reference sample point and the second marker value represents one of the algorithms supported by the positioning device for calculating the reference phase; before the receiving the first signaling sent by the LMF device, the method further includes: transmitting a second signaling to the LMF device; The second signaling includes a fourth parameter and a fifth parameter, where the fourth parameter is used to represent an algorithm supported by the positioning device and used to select the reference sample point, and the fifth parameter is used to represent an algorithm supported by the positioning device and used to calculate the reference phase.
The method of claim 5, wherein the second signaling further includes a sixth parameter, the sixth parameter representing a range of values for calculating a number of samples of the reference phase; in the case that the algorithm of the fourth parameter representation comprises a second algorithm, the second signaling also comprises a seventh parameter; Wherein, the seventh parameter is used for representing the value range of the preset multiple; In the case that the algorithm of the fifth parameter representation includes a fourth algorithm, the second signaling further includes an eighth parameter; Wherein the eighth parameter is used to represent a range of values for the interval between the alternative angles.
The method according to any one of claims 1-6, further comprising, after the inputting the phase-aligned CIR into a positioning model and obtaining positioning information output by the positioning model: predicting a confidence region where the terminal is to be located at a future target moment according to the obtained positioning information; after reaching the target moment, the obtained positioning information of the target moment determines the actual position of the terminal at the target moment; Judging whether the actual position corresponding to the current target moment is positioned in the current confidence region or not; And if the accumulated times of judging that the actual position is not located in the confidence area does not reach the preset times, returning to the step of acquiring the channel impulse response CIR of the channel between the terminal to be located and the base station.
A method according to claim 1 or 2, wherein the positioning device is a first terminal or a first base station or an LMF device.
A positioning device, the positioning device comprising: A processor; A transceiver; A machine-readable storage medium storing machine-executable instructions executable by the processor, the machine-executable instructions causing the processor to perform the steps of: acquiring a Channel Impulse Response (CIR) of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sampling points; Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points, wherein the amplitude of the reference sample point is larger than a preset standard; calculating a reference phase based on the reference sample point; Performing phase alignment on the plurality of sampling points based on the reference phase to obtain CIR after phase alignment; And inputting the CIR after phase alignment into a positioning model, and obtaining positioning information output by the positioning model.
The positioning device of claim 9, wherein said selecting a reference sample from said plurality of samples based on the magnitude of each of said plurality of samples, comprises: Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points by adopting a first algorithm or a second algorithm; The first algorithm is to select a sample point with the largest amplitude from a plurality of sample points as the reference sample point, and the second algorithm is to select a first sample point higher than an amplitude threshold from the plurality of sample points as the reference sample point, wherein the amplitude threshold is a preset multiple of the noise standard deviation of the CIR; the calculating a reference phase based on the reference sample point includes: calculating a reference phase based on the reference sample point by adopting a third algorithm or a fourth algorithm; Calculating an average value of phases of all sample points in a sample point set as a reference phase, wherein the sample point set comprises a plurality of continuous sample points from the reference sample point; The fourth algorithm is that for each alternative angle in a plurality of alternative angles, the sum of imaginary parts of sampling points in the sampling point set after the phase of the sampling points in the sampling point set is rotated by the alternative angle is calculated, and the alternative angle with the minimum sum of the imaginary parts is selected as a reference phase.
The positioning device of claim 10, wherein when the positioning device is a first terminal or a first base station, the machine-executable instructions further cause the processor to perform the steps of, prior to the acquiring a channel impulse response, CIR, for a channel between a terminal to be positioned and a base station: receiving a first signaling sent by a Location Management Function (LMF) device, wherein the first signaling comprises a first mark value and a second mark value, the first mark value represents an algorithm for selecting the reference sample point, and the second mark value represents an algorithm for calculating the reference phase; the selecting a reference sample from the plurality of samples according to the magnitude of each of the plurality of samples comprises: selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points by adopting an algorithm represented by the first mark value; the calculating a reference phase based on the reference sample point includes: and calculating a reference phase based on the reference sample point by adopting an algorithm represented by the second mark value.
The positioning device of claim 11, wherein the first signaling further comprises a first parameter representing a number of samples used to calculate a reference phase; In the case that the first flag value indicates a second algorithm, the first signaling further includes a second parameter, where the second parameter is used to indicate the preset multiple; In case the second flag value represents a fourth algorithm, the first signaling further comprises a third parameter for representing a minimum interval between the alternative angles.
The positioning device of claim 11, wherein the first marker value represents one of the algorithms supported by the positioning device for selecting the reference sample point and the second marker value represents one of the algorithms supported by the positioning device for calculating the reference phase; The machine-executable instructions further cause the processor to, prior to the receiving the first signaling sent by the LMF device, perform the steps of: transmitting a second signaling to the LMF device; The second signaling includes a fourth parameter and a fifth parameter, where the fourth parameter is used to represent an algorithm supported by the positioning device and used to select the reference sample point, and the fifth parameter is used to represent an algorithm supported by the positioning device and used to calculate the reference phase.
The positioning device of claim 13, wherein the second signaling further includes a sixth parameter, the sixth parameter representing a range of values for calculating a number of samples of the reference phase; in the case that the algorithm of the fourth parameter representation comprises a second algorithm, the second signaling also comprises a seventh parameter; Wherein, the seventh parameter is used for representing the value range of the preset multiple; In the case that the algorithm of the fifth parameter representation includes a fourth algorithm, the second signaling further includes an eighth parameter; Wherein the eighth parameter is used to represent a range of values for the interval between the alternative angles.
The positioning device of any of claims 9-14, wherein after the input of the phase-aligned CIR into a positioning model, the machine-executable instructions further cause the processor to perform the steps of: predicting a confidence region where the terminal is to be located at a future target moment according to the obtained positioning information; after reaching the target moment, the obtained positioning information of the target moment determines the actual position of the terminal at the target moment; Judging whether the actual position corresponding to the current target moment is positioned in the current confidence region or not; And if the accumulated times of judging that the actual position is not located in the confidence area does not reach the preset times, returning to the step of acquiring the channel impulse response CIR of the channel between the terminal to be located and the base station.
A positioning device according to claim 9 or 10, characterized in that the positioning device is a first terminal or a first base station or an LMF device.
A positioning apparatus for use with a positioning device, the apparatus comprising: The CIR acquisition module is used for acquiring a channel impulse response CIR of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sample points; The sampling point selection module is used for selecting a reference sampling point from the plurality of sampling points according to the amplitude of each sampling point in the plurality of sampling points, wherein the amplitude of the reference sampling point is larger than a preset standard; A phase calculation module for calculating a reference phase based on the reference sample point; The phase alignment module is used for carrying out phase alignment on the plurality of sample points based on the reference phase to obtain CIR after phase alignment; And the positioning information acquisition module is used for inputting the CIR after the phase alignment into a positioning model and acquiring the positioning information output by the positioning model.
The apparatus of claim 17, wherein the sample selection module is specifically configured to: Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points by adopting a first algorithm or a second algorithm; The first algorithm is to select a sample point with the largest amplitude from a plurality of sample points as the reference sample point, and the second algorithm is to select a first sample point higher than an amplitude threshold from the plurality of sample points as the reference sample point, wherein the amplitude threshold is a preset multiple of the noise standard deviation of the CIR; the phase calculation module is specifically configured to: calculating a reference phase based on the reference sample point by adopting a third algorithm or a fourth algorithm; Calculating an average value of phases of all sample points in a sample point set as a reference phase, wherein the sample point set comprises a plurality of continuous sample points from the reference sample point; The fourth algorithm is that for each alternative angle in a plurality of alternative angles, the sum of imaginary parts of sampling points in the sampling point set after the phase of the sampling points in the sampling point set is rotated by the alternative angle is calculated, and the alternative angle with the minimum sum of the imaginary parts is selected as a reference phase.
The apparatus of claim 18, wherein the apparatus further comprises: The signal receiving module is used for receiving a first signal sent by the LMF equipment, wherein the first signal comprises a first mark value and a second mark value, the first mark value represents an algorithm for selecting the reference sample point, and the second mark value represents an algorithm for calculating the reference phase; the sampling point selection module is specifically configured to: selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points by adopting an algorithm represented by the first mark value; the phase calculation module is specifically configured to: and calculating a reference phase based on the reference sample point by adopting an algorithm represented by the second mark value.
The apparatus of claim 19, wherein the first signaling further comprises a first parameter representing a number of samples used to calculate a reference phase; In the case that the first flag value indicates a second algorithm, the first signaling further includes a second parameter, where the second parameter is used to indicate the preset multiple; In case the second flag value represents a fourth algorithm, the first signaling further comprises a third parameter for representing a minimum interval between the alternative angles.

Description

Positioning method, equipment and device Technical Field The present application relates to the field of communications technologies, and in particular, to a positioning method, apparatus, and device. Background In the 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology) NR (New Radio, new air interface) Positioning technology, PRS (Positioning reference signal) or SRS (Sounding REFERENCE SIGNAL) may be measured by a terminal or a base station to obtain a CIR (Channel Impulse Response ) of a channel. And then, a positioning model such as an AI (ARTIFICIAL INTELLIGENCE ) model or an ML (MACHINE LEARNING, machine learning) model can be used for processing the CIR, so that the terminal is positioned based on the positioning information output by the positioning model, and the 5GNR positioning is realized. Since the CIR is obtained by measuring the RS (REFERENCE SIGNAL ), there is an asynchronism between the RS transmitter and the receiver, resulting in a deviation between the time the transmitter transmits the RS and the time the receiver receives the RS. And then, the problem that the CIR obtained by RS measurement with time deviation has random initial phase mismatch is caused, namely, each sample point in the CIR obtained by measurement has phase offset caused by the random initial phase mismatch. This makes the CIR training and deducing process by the positioning model have serious ambiguity, and thus the positioning performance of the positioning model is affected. Disclosure of Invention The embodiment of the application aims to provide a positioning method, equipment and device for aligning the phases of CIRs so as to solve the problem of random initial phase mismatch of the CIRs and further improve the positioning accuracy of a positioning model. The specific technical scheme is as follows: In a first aspect, an embodiment of the present application provides a positioning method, applied to a positioning device, where the method includes: acquiring a Channel Impulse Response (CIR) of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sampling points; Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points, wherein the amplitude of the reference sample point is larger than a preset standard; calculating a reference phase based on the reference sample point; Performing phase alignment on the plurality of sampling points based on the reference phase to obtain CIR after phase alignment; And inputting the CIR after phase alignment into a positioning model, and obtaining positioning information output by the positioning model. In a second aspect, an embodiment of the present application provides a positioning apparatus, including: A processor; A transceiver; A machine-readable storage medium storing machine-executable instructions executable by the processor, the machine-executable instructions causing the processor to perform the steps of: acquiring a Channel Impulse Response (CIR) of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sampling points; Selecting a reference sample point from the plurality of sample points according to the amplitude of each sample point in the plurality of sample points, wherein the amplitude of the reference sample point is larger than a preset standard; calculating a reference phase based on the reference sample point; Performing phase alignment on the plurality of sampling points based on the reference phase to obtain CIR after phase alignment; And inputting the CIR after phase alignment into a positioning model, and obtaining positioning information output by the positioning model. In a third aspect, an embodiment of the present application provides a positioning apparatus, applied to a positioning device, where the apparatus includes: The CIR acquisition module is used for acquiring a channel impulse response CIR of a channel between a terminal to be positioned and a base station, wherein the CIR comprises a plurality of sample points; The sampling point selection module is used for selecting a reference sampling point from the plurality of sampling points according to the amplitude of each sampling point in the plurality of sampling points, wherein the amplitude of the reference sampling point is larger than a preset standard; A phase calculation module for calculating a reference phase based on the reference sample point; The phase alignment module is used for carrying out phase alignment on the plurality of sample points based on the reference phase to obtain CIR after phase alignment; And inputting the CIR after phase alignment into a positioning model, and obtaining positioning information output by the positioning model. In a fourth aspect, an embodiment of the application provides a machine-readable storage me