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A centralized asynchronous fusion method based on radars with different range and angle resolutions

A technology of angular resolution and fusion method, which is applied in the direction of instruments, measuring devices, and utilization of re-radiation, etc., can solve the problem that radar data cannot be processed, and achieve the effect of improving the detection and tracking effect and simplifying the solution process

Active Publication Date: 2020-02-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to address the defects in the prior art, research and design a centralized fusion method based on DP-TBD that can realize radars with different distances and angular resolutions, and solve the problems of existing radar data with different distances and angular resolutions. Problems that can be addressed by dynamic (DP) programming algorithms based on track-before-detect (TBD)

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  • A centralized asynchronous fusion method based on radars with different range and angle resolutions
  • A centralized asynchronous fusion method based on radars with different range and angle resolutions
  • A centralized asynchronous fusion method based on radars with different range and angle resolutions

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Embodiment Construction

[0046] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on MatlabR2013a. The present invention will be further described in detail with regard to specific embodiments below.

[0047] Step 1: Determine the target motion equation;

[0048] It is assumed that there are P radars in the detection area, each radar processes F frames, and the target track is a series of continuous states, defined as follows from the first frame to the P×F frame:

[0049]

[0050] Among them, P×F represents the total number of frames processed by the fusion center for a dynamic planning;

[0051] Step 2: Measuring space rasterization;

[0052] Consider that the detection area is an area composed of distance and angle; select a measurement space Z"' to determine the grid size; the measurement space is selected as the intermediate resolution radar among multiple radars; this is because when the resolution is rela...

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Abstract

The invention discloses a centralized asynchronous fusion method based on radars with different distance and angle resolutions, and relates to research on measurement alignment of radars with different distance resolutions and multi-radar data fusion technology. The present invention first establishes the target movement and measurement equations under the polar coordinate system of the radar; then adopts space grid division, and aligns radar measurement data with different distances and angular resolutions to the same size by means of grid alignment , and then use the centralized asynchronous fusion method to fuse the measurement data of multiple radars, and use the DP-TBD method to process the fused data and restore the target trajectory. The present invention effectively solves the problem that radars with different distances and angular resolutions are difficult to perform centralized fusion using a dynamic programming algorithm based on tracking before detection in practical applications, thereby realizing centralized measurement of radars with different distances and angular resolutions Asynchronous fusion can effectively improve the tracking effect on weak targets.

Description

technical field [0001] The invention belongs to the field of radar technology, and relates to the research on measurement alignment of radars with different distance resolutions and multi-radar data fusion technology. Background technique [0002] Track-before-detect (TBD) technology is a technology to detect and track targets under the condition of low signal-to-noise ratio. The difference from the general detection method is that it adopts a new idea: the detection result is not announced in a single frame, but the single-frame echo data information is digitized and stored, and the multi-frame data is processed simultaneously. Announce detection results and track of the target. Its essence is to accumulate multiple frames of the target signal, highlight the target information while suppressing clutter interference, and use time accumulation in exchange for an increase in the signal-to-noise ratio, which solves the problem of processing each frame of data by the traditiona...

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Application Information

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IPC IPC(8): G01S7/41G01S13/87G01S13/72
CPCG01S7/41G01S13/72G01S13/87
Inventor 易伟李洋漾李雯孙智陈璐徐璐霄孔令讲崔国龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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