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A TDOA positioning method, device and system based on time difference calculation

A technology of time difference and time difference, which is applied in the field of TDOA positioning method, device and system based on time difference calculation, which can solve the problems of large data transmission, high sensitivity, and low precision of TDOA positioning system, so as to reduce data transmission volume and sensitivity degree, the effect of improving real-time processing capability

Active Publication Date: 2019-08-13
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The existing time difference calculation algorithm is highly sensitive to noise, resulting in low precision of the TDOA positioning system;
[0008] (2) The existing TDOA positioning system has a large amount of data transmission, which restricts the real-time processing capability of the control center

Method used

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  • A TDOA positioning method, device and system based on time difference calculation
  • A TDOA positioning method, device and system based on time difference calculation
  • A TDOA positioning method, device and system based on time difference calculation

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Experimental program
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Effect test

Embodiment 1

[0058] The purpose of Embodiment 1 is to provide a TDOA positioning method based on time difference calculation.

[0059] In order to achieve the above object, the present invention adopts the following technical scheme:

[0060] like figure 1 as shown,

[0061] A TDOA positioning method based on time difference calculation, the method comprises the following steps:

[0062] Step (1): receiving signals from the same radiation source received by different measuring stations;

[0063] Step (2): Separately screen the effective spectral line data in the low frequency band of the signal to remove the spectral line data with low contribution to the time difference calculation;

[0064] Step (3): Cut down the spectral line amplitudes that have a low contribution to the time difference calculation in the signal processed by the discretized weight function to obtain the cross power spectral density function, and calculate the time difference for TDOA positioning.

[0065] In this e...

Embodiment 2

[0089] The purpose of Embodiment 2 is to provide a computer-readable storage medium. This embodiment is based on the above-mentioned Embodiment 1.

[0090] In order to achieve the above object, the present invention adopts the following technical scheme:

[0091] A computer-readable storage medium, in which a plurality of instructions are stored, and the instructions are adapted to be loaded by a processor of a terminal device and perform the following processing:

[0092] Receiving signals from the same radiation source received by different measuring stations;

[0093] Separately screen the low-frequency effective spectral line data of the signal to remove the spectral line data with low contribution to the time difference calculation;

[0094] The cross-power spectral density function is obtained by reducing the spectral line amplitude with low contribution to the time difference calculation in the signal processed by the discretized weight function, and the time differen...

Embodiment 3

[0097] The purpose of Embodiment 3 is to provide a TDOA positioning device based on time difference calculation. This embodiment is based on the above-mentioned Embodiment 1.

[0098] In order to achieve the above object, the present invention adopts the following technical scheme:

[0099] A TDOA positioning device based on time difference calculation, using a computing terminal device, including a processor and a computer-readable storage medium, the processor is used to implement each instruction; the computer-readable storage medium is used to store multiple instructions, and the instructions are suitable for is loaded by the processor and performs the following processing:

[0100] Receiving signals from the same radiation source received by different measuring stations;

[0101] Separately screen the low-frequency effective spectral line data of the signal to remove the spectral line data with low contribution to the time difference calculation;

[0102] The cross-pow...

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Abstract

The invention discloses a TDOA positioning method, device and system based on time difference calculation. The method includes: receiving nodes of several measuring stations measure and receive signals sent by the same radiation source, and process the signals to remove their high-frequency spectral line data. And send the processed signal to the control center; the control center receives the signals processed by different measuring stations; respectively screen the effective spectral line data in the low frequency band of the signal to remove the spectral line data with low contribution to the time difference calculation; reduce the discretized weight function In the processed signal, the spectral line amplitude with low contribution to the time difference is calculated to obtain the cross power spectral density function, and the time difference is calculated for TDOA positioning. The invention not only reduces the sensitivity to noise, but also enables the resolution of time delay to meet engineering needs, and at the same time properly compresses the transmission data, thereby improving the real-time processing speed of the control center.

Description

technical field [0001] The invention belongs to the technical field of passive positioning, and in particular relates to a TDOA positioning method, device and system based on time difference calculation. Background technique [0002] Compared with active positioning, passive positioning does not need to emit electromagnetic waves. Passive positioning determines the position of the target by receiving electromagnetic waves emitted by the target radiation source. The TDOA positioning technology in passive positioning has especially attracted extensive attention in the industry. The TDOA positioning technology has the advantages of high positioning accuracy and easy networking. The first problem to be solved in TDOA positioning is to calculate the time difference between the same signal arriving at different receivers. [0003] Time delay, that is, the calculation of time difference is used in many engineering application fields. Therefore, the calculation of time delay is an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/00
CPCG01S5/0009
Inventor 胡正郭利强杨青刘军
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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