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Moving target indoor positioning and real-time tracking method

A moving target, indoor positioning technology, applied in the field of radar

Inactive Publication Date: 2018-09-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What distance measurement requires is the round-trip phase shift of the entire microwave propagation process, not the Doppler phase shift, so distance measurement is inevitably affected by multipath propagation and indoor environment background scattering

Method used

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  • Moving target indoor positioning and real-time tracking method
  • Moving target indoor positioning and real-time tracking method

Examples

Experimental program
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Embodiment

[0108] Figure 4 The setup for the simulation is shown, and all coordinates in the simulation are in millimeters. The transmitting antenna of the radar group is placed at the origin position (0,0), and the receiving antennas R1, R2 and R3 are placed on the x-axis, and their coordinates are (-100,0), (100,0) and (200 ,0). The simulated two-dimensional motion is on the x-y plane.

[0109] In the simulation, a Z-shaped motion with four corner coordinates (0,,200), (80,200), (0,120) and (80,120) and a trajectory equation is x 2 +(y-160) 2 =40 2 A circle of is used, as Figure 4 shown. These two representative motions were chosen because, in circular motion, the receiver can receive continuous motion in all directions, while in Z-shaped motion, the receiver can receive motion with abrupt changes in direction. The above two motions are simulated to be detected by the two sub-radar groups, and calculated using formulas (2-7), (2-8) and the initial position (0,200).

[0110] ...

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Abstract

The invention discloses a moving target indoor positioning and real-time tracking method. The method is implemented based on a single-input multiple-output (SIMO) Doppler radar sensor with a redundantreceiving path. According to the present invention, in order to cooperate with the sensor, an indoor passive target position tracking algorithm which works cooperatively is designed. The algorithm can be based on the a priori fact that motion measured by a redundant receiver is the same motion measured by other receivers. Since the algorithm only uses Doppler phase information during a positioning process, the method is only sensitive to a moving target, and the effect of the positioning algorithm is not affected by serious multipath effects and background scattering in an indoor environment;and since the designed and implemented Doppler radar sensor operates at a single frequency and has the highest spectrum and energy efficiency, the sensor can be used in all ISM bands.

Description

technical field [0001] The invention belongs to the field of radar, and in particular relates to a method for indoor positioning and real-time tracking of a moving target based on single-frequency Doppler radar sensing. Background technique [0002] With the rapid development of the times and science and technology, the efficiency of the information system has become higher and it is not easy to be disturbed. It has played an indispensable role in daily life, work and scientific research. Among them, indoor positioning technology is highly practical and has a wide range of applications. In many complex environments, such as shopping malls, stadiums, supermarkets, warehouses, etc., it can quickly locate people or objects. [0003] Although wireless indoor positioning technology has made great progress, there are still some technical challenges in practical applications. The main challenges come from multipath reflections caused by complex indoor environments and unpredictabl...

Claims

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Application Information

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IPC IPC(8): G01S13/66G01S13/70G01S13/06G01S7/36
CPCG01S7/36G01S13/06G01S13/66G01S13/70
Inventor 朱安杰乔闪冉立新
Owner ZHEJIANG UNIV
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