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High-precision motion single-station direct positioning method based on arrival angle and Doppler frequency shift

A technology of Doppler frequency shift and positioning method, which is applied in the field of direct positioning of moving single stations, and can solve the problems of difficult equipment transplantation and resource consumption

Pending Publication Date: 2021-04-06
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional direct positioning method mostly uses a multi-station passive positioning system, which requires a large amount of communication data transmission between each station, which is very resource-intensive and the equipment is not easy to transplant

Method used

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  • High-precision motion single-station direct positioning method based on arrival angle and Doppler frequency shift
  • High-precision motion single-station direct positioning method based on arrival angle and Doppler frequency shift
  • High-precision motion single-station direct positioning method based on arrival angle and Doppler frequency shift

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specific Embodiment

[0105] 1. Establish a target source signal data receiving model including angle of arrival and Doppler frequency shift, and collect data from the target source. In order to effectively utilize the Doppler frequency shift information, construct a time factor to expand the dimension of the received signal matrix;

[0106] 2. According to the target source data reception model established in step 1 and the data collected by the single station on the target source, combined with the mean square error of the target source position, construct a cost function for the direct positioning of the moving single station;

[0107] 3. According to the established target cost function, use the MVDR criterion to solve the radiation source position solution.

[0108] Suppose there are two far-field narrowband signals as the target radiation source, and their two-dimensional position parameters are (x, y) = (-1.2km, 1.2km), (x, y) = (0km, 0km), and the motion receiving A single station is a uni...

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Abstract

The invention discloses a high-precision motion single-station direct positioning method based on an arrival angle and Doppler frequency shift. The method comprises the steps of firstly building a target source signal data receiving model comprising the arrival angle and the Doppler frequency shift, and carrying out the data collection of a target source, then constructing a time factor for expanding the dimension of the received signal matrix, constructing a cost function of direct positioning of the moving single station according to the target source data receiving model and the data acquired by the single station for the target source in combination with the mean square error of the position of the target source, and finally, solving the radiation source position by utilizing an MVDR criterion according to the established target cost function. The positioning performance can be improved; for a scene where a plurality of radiation sources need to be positioned, the number of signal sources does not need to be known in advance, and the positioning precision is effectively improved compared with a maximum likelihood method.

Description

technical field [0001] The invention belongs to the technical field of passive positioning, and in particular relates to a direct positioning method of a moving single station. Background technique [0002] The traditional passive positioning system generally adopts a two-step positioning mode, that is, the system first checks the parameters of the target source (such as the angle of arrival (Direction of Arrival, DOA), time of arrival (Time of Arrival, TOA), time difference of arrival (Time Difference of Arrival, TDOA), Doppler frequency difference (Frequency Difference of Arrival, FDOA), received signal strength, etc.) are estimated, and then the position information of the target source is finally estimated by performing positioning calculation on the obtained parameters. However, when using this two-step positioning method to locate the target source, it needs to collect a variety of data, and calculate the position of the target through the positioning equation, which s...

Claims

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Application Information

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IPC IPC(8): G01S11/10G01S5/02
CPCG01S11/10G01S5/02
Inventor 谢坚王秋平汪跃先王伶张兆林陈清浪丁立超陶明亮范一飞粟嘉杨欣韩闯宫延云
Owner NORTHWESTERN POLYTECHNICAL UNIV
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