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Single-base-station ultra-wideband AOA positioning method based on frequency-modulated continuous waves

A technology of frequency modulation continuous wave and positioning method, which is applied in the directions of positioning, radio wave measurement system, measurement device, etc., can solve the problems of low precision and large error, and achieve the effect of small calculation amount, simple realization process and high precision

Inactive Publication Date: 2020-05-19
杭州优智联科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a single base station ultra-wideband AOA positioning method based on FM continuous wave, so as to solve the problems of large error and low precision in the estimation of angle of arrival AOA in the prior art

Method used

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  • Single-base-station ultra-wideband AOA positioning method based on frequency-modulated continuous waves
  • Single-base-station ultra-wideband AOA positioning method based on frequency-modulated continuous waves
  • Single-base-station ultra-wideband AOA positioning method based on frequency-modulated continuous waves

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the single base station UWB AOA positioning method based on FM continuous wave, in the single base station UWB positioning system, the signal sent by the positioning tag is received by the antenna linear array, including the following steps:

[0027] (1) Make the positioning tag send the FM continuous wave signal to the antenna linear array, and each antenna unit in the antenna linear array receives the FM continuous wave signal respectively;

[0028] (2) Mix the signals received by any two antenna units first, and then filter out the high-frequency signals in the mixed signals to obtain the difference frequency between the signals received by any two adjacent antenna units f 0 ;

[0029] (3), using the beat frequency obtained in step (2) f 0 , according to the following formula to calculate the arrival distance d...

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Abstract

The invention discloses a single base station ultra wide band AOA positioning method based on frequency modulation continuous waves. In the method, a positioning tag sends a frequency modulation continuous wave; the single-base-station ultra-wideband positioning system based on the linear antenna array performs frequency mixing processing after receiving the signal sent by the positioning tag; andthen filtering the high-frequency signals to obtain the frequency difference between the signals received by the two adjacent antenna units, calculating the distance difference between the signals and each antenna unit through a derivation formula of the frequency difference, and calculating the arrival angle AOA by using a trigonometric function according to the geometrical relationship of the antenna units. The method is simple in implementation process and small in calculation amount, an accurate synchronous clock is not needed, and the calculation result has high precision.

Description

technical field [0001] The invention relates to the field of single-base station antenna angle-of-arrival positioning methods, in particular to a single-base station ultra-wideband AOA positioning method based on frequency-modulated continuous waves. Background technique [0002] In the single base station ultra-wideband (UWB) positioning system composed of antenna linear array, it receives the signal sent by the positioning tag through the antenna linear array, and then according to the distance between the antenna linear array and the positioning tag, combined with the direction information of the antenna beam Calculate the angle of arrival AOA, and then use the dynamic tracking algorithm to realize the positioning of the moving positioning tag. The traditional single-base ultra-wideband (UWB) positioning system requires very precise clock synchronization of each antenna unit in the antenna linear array when calculating the angle of arrival AOA, but because the time error ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 陈文晓吴极董宗宇
Owner 杭州优智联科技有限公司
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