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Multifunctional radar state sequence clustering method based on time sequence segmentation

A state sequence and time sequence technology, applied in the direction of instruments, character and pattern recognition, computer components, etc.

Active Publication Date: 2021-08-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods will encounter difficulties in the following four aspects: 1) These recognition methods are all supervised learning, which need to obtain training data in advance, and then identify them in a given category
In the face of advanced multifunctional radar such as software custom radar or cognitive radar, a pre-trained network will always encounter new working mode categories; Distinguished radar working modes, a classifier trained for pulse modulation type recognition often does not make such a fine-grained distinction

Method used

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  • Multifunctional radar state sequence clustering method based on time sequence segmentation
  • Multifunctional radar state sequence clustering method based on time sequence segmentation
  • Multifunctional radar state sequence clustering method based on time sequence segmentation

Examples

Experimental program
Comparison scheme
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Embodiment

[0130] The pulse segments with different PRI inter-pulse modulation styles or different modulation parameters of the same inter-pulse modulation mode are defined as different radar working mode segments. This example shows the situation that each working mode segment in the pulse sequence is sinusoidally modulated, but the modulation parameters of each segment are different and unknown. In this case, we generate a test sample, each sample contains five sine segments, and each segment contains 120 pulses. Each sample to be tested corresponds to each working mode segment and is set to Θ P ={(2,0.25,50,0.5 2 ), (3,0.2,40,0.5 2 ),(4,0.15,30,0.5 2 ), (5,0.1,20,0.5 2 )}, where the fifth fragment repeats once for the second fragment.

[0131] The specific segmentation clustering method is as follows:

[0132] First receive the pulse sequence P=(p 1 ,p 2 ,...,p T ), where p iis the i-th pulse, and each pulse is characterized by a PRI parameter. Set w=20, Gaussian jitter thr...

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Abstract

The invention discloses a multifunctional radar state sequence clustering method based on time sequence segmentation, and the method can achieve the clustering of a complex multifunctional radar working mode pulse sequence with a variable pulse input form, a variable mode number, a variable mode length and a variable mode modulation parameter on each PDW parameter, pulse-level unsupervised time sequence segmentation clustering is performed; the inter-pulse modulation type of each PDW parameter is utilized to construct a corresponding time sequence parameterization model and give corresponding model parameter estimation; each parameterized model can represent time sequence characteristics of different inter-pulse modulation types; the clustering result is marked to the pulse level, each pulse belonging to different radar working modes in the long pulse sequence can be clustered, meanwhile, the clustering result can give model parameters of each parameterized model, and conditions are provided for fine analysis and processing of the subsequent pulse sequence.

Description

technical field [0001] The invention relates to the technical field of radar electronic reconnaissance, in particular to a multifunctional radar state sequence clustering method based on time sequence segmentation. Background technique [0002] Multifunctional radar is a complex sensor with multiple dynamic working modes, which is widely used in surveillance, target tracking and identification and other fields. The multifunctional radar can execute multiple different radar working modes at the same time, and has agile beam scheduling capabilities, complex signal modulation patterns, and program-controlled working mode arrangement. The multifunctional radar schedules several different radar working modes on the timeline. For each programmed radar working mode, the control parameters of the radar can be selected or optimized based on the perception of the current environment and targets (these control parameters are used by the reconnaissance side and Called pulse description...

Claims

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/2321
Inventor 李云杰朱梦韬李岩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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