TDOA (time difference of arrival) positioning method, device and system based on time difference calculation

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

Active Publication Date: 2018-04-03
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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  • TDOA (time difference of arrival) positioning method, device and system based on time difference calculation
  • TDOA (time difference of arrival) positioning method, device and system based on time difference calculation
  • TDOA (time difference of arrival) positioning method, device and system based on time difference calculation

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Comparison scheme
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Embodiment 1

[0057] The purpose of Embodiment 1 is to provide a TDOA positioning method based on time difference calculation.

[0058] In order to achieve the above object, the present invention adopts the following technical scheme:

[0059] Such as figure 1 as shown,

[0060] A TDOA positioning method based on time difference calculation, the method comprises the following steps:

[0061] Step (1): receiving signals from the same radiation source received by different measuring stations;

[0062] 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;

[0063] 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.

[0064] In thi...

Embodiment 2

[0088] The purpose of Embodiment 2 is to provide a computer-readable storage medium. This embodiment is based on the above-mentioned Embodiment 1.

[0089] In order to achieve the above object, the present invention adopts the following technical scheme:

[0090] 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:

[0091] Receiving signals from the same radiation source received by different measuring stations;

[0092] 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;

[0093] 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

[0096] 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.

[0097] In order to achieve the above object, the present invention adopts the following technical scheme:

[0098] 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:

[0099] Receiving signals from the same radiation source received by different measuring stations;

[0100] 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;

[0101] The cross-pow...

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Abstract

The invention discloses a TDOA (time difference of arrival) positioning method, device and system based on time difference calculation. The method includes the steps: measuring and receiving signals transmitted by the same radiation source by receiving nodes of a plurality of measuring stations; processing the signals to remove high-frequency section spectrum line data of the signals, and transmitting the processed signals to a control center; receiving signals processed by different measuring stations by the control center; screening low-frequency section effective spectrum line data of the signals to remove spectrum line data with low contribution degree for time difference calculation; cutting down spectrum line amplitudes with low contribution degree for time difference calculation inthe signals processed by a discretized weighting function to obtain a cross-power spectrum density function, and calculating time difference to perform TDOA positioning. According to the method, noisesensitivity is reduced, the resolution ratio of time delay meets engineering requirements, transmitted data are suitably compressed, and real-time processing of the control center is accelerated.

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 Applications(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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