Unlock instant, AI-driven research and patent intelligence for your innovation.

Movable measurement station-based anti-multipath time difference positioning method, device and system

A technology of time difference positioning and measuring station, which is applied in measurement devices, radio wave measurement systems, positioning and other directions. The effect of improving positioning accuracy and low computational complexity

Active Publication Date: 2019-10-18
CHINA ELECTRONIS TECH INSTR CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In urban multipath scenarios, the research on positioning accuracy generally starts from two aspects: the signal positioning solution algorithm and the delay estimation algorithm, to improve the positioning accuracy of the system in a multipath environment: one is to start from the solution of the positioning equation, Various optimization algorithms are used to improve the positioning accuracy. These generally have high computational complexity and require a lot of measuring stations, which increases the system cost. The second is to design various time delay estimation algorithms. Time delay estimation error characteristics and multi-path channel models, etc., improve the accuracy of time delay estimation. These methods have high computational complexity, most of which remain in the theoretical research stage, and are dependent on the model, which is difficult to apply in engineering

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Movable measurement station-based anti-multipath time difference positioning method, device and system
  • Movable measurement station-based anti-multipath time difference positioning method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, an anti-multipath time difference positioning method based on mobile measuring stations is designed, and three mobile measuring stations are used for mobile layout, such as figure 1 As shown, assume that the two-dimensional coordinates of the three measuring stations are (x i ,y i ), (x j ,y j ), (x k ,y k ), the coordinates of the radiation source are (x,y). Here it is assumed that the distance from the signal to the measuring station i is d i , then d ij = d i -d j Indicates the distance difference between the arrival of the radiation source signal at measurement station i and the arrival of the radiation source signal at measurement station j. distance difference d ij It can be obtained by measuring the time difference.

[0030] by relationship d ki = d j +d k -d i -d j The equation can be deduced:

[0031]

[0032] Further abbreviated as:

[0033] a m x+b m y=c m

[0034] This formula shows that in the absence of measurem...

Embodiment 2

[0046] This embodiment designs a computer-readable storage medium, which stores a plurality of instructions, and the instructions are suitable for being loaded and executed by the processor of the terminal device to realize the anti-corrosion system based on the mobile measuring station as described in the first embodiment. The steps of the multipath time difference positioning method are the same as those in Embodiment 1, and reference may be made to the description of Embodiment 1, which will not be repeated here.

[0047] In this embodiment, examples of the computer-readable recording medium include magnetic storage media (for example, ROM, RAM, USB, floppy disk, hard disk, etc.), optical recording media (for example, CD-ROM or DVD), PC interfaces (for example, PCI, PCI-Express, WiFi, etc.), and various aspects disclosed in this embodiment are not limited thereto.

Embodiment 3

[0049] This embodiment designs an anti-multipath time difference positioning device based on a mobile measuring station, including a processor of a terminal device and a computer-readable storage medium, the processor is used to implement various instructions; the computer-readable storage medium is used to store multiple instructions, The instructions are adapted to be loaded by the processor and execute the steps of the anti-multipath time difference positioning method based on the mobile measuring station as described in Embodiment 1. The method steps specifically executed during operation are the same as those in Embodiment 1, see Embodiment 1 records, which will not be repeated here.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a movable measurement station-based anti-multipath time difference positioning method, device and system. The method comprises the following steps of designating station distribution mobile regions of three mobile measurement stations around a region according to a known rough region where a radiation source is located or a designated to-be-positioned region; respectively moving the three measurement station for station distribution in the respective station distribution movable region, and storing a measurement linear coefficient after station distribution each time; and judging a position of the radiation source according to the measured and stored straight line. A rapid mode or a calculation mode is employed during position judgment, the algorithm calculation complexity is low, only three movable measurement stations are employed, measurement for many times is performed by layout of the movable measurement stations for many times, a plurality of positioning straight lines are obtained, a straight line intersection set is obtained according to the positioning straight lines, information fusion is performed, the position of the radiation source is finally obtained, and the influence of a multipath environment is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of time difference positioning, in particular to a multipath time difference resistance positioning method, device and system based on a mobile measuring station. Background technique [0002] Time Difference of Arrival TDOA (TDOA) is a passive positioning technology, which has been widely researched and applied due to its low cost and strong concealment. In time-of-flight positioning systems, signals are often transmitted in non-line-of-sight environments and multi-path channels, especially in urban environments with many tall buildings, where multi-path environments are common. When the signal is transmitted in a non-line-of-sight environment and a multipath channel, due to the influence of multipath, the signal received by the receiver can be superimposed by multiple signals with different phase rotations, different amplitude fading, and different delay values. become. Multipath will cause a large time ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 胡正郭利强刘军卜晓楠李树芳董守拯江伟健
Owner CHINA ELECTRONIS TECH INSTR CO LTD