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Radar signal sorting method and system based on PRI interval information

A radar signal sorting and interval technology, applied in the radio wave measurement system, radio wave reflection/reradiation, complex mathematical operations, etc., can solve the problems of low PRI estimation accuracy and low sorting success rate, and achieve improvement PRI estimation accuracy and sorting success rate, high extraction success rate, and the effect of reducing the difficulty of pulse sorting

Pending Publication Date: 2022-02-08
NAVAL AERONAUTICAL UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a radar signal sorting method and system based on PRI interval information, to improve the PRI estimation accuracy of mixed and overlapping pulses in a complex environment, thereby achieving the purpose of improving the success rate of radar pulse signal sorting, and solving the problem of The existing radar signal sorting methods have the problems of low PRI estimation accuracy and low sorting success rate

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  • Radar signal sorting method and system based on PRI interval information
  • Radar signal sorting method and system based on PRI interval information
  • Radar signal sorting method and system based on PRI interval information

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Embodiment 1

[0078] like figure 1 As shown, this embodiment provides a radar signal sorting method based on PRI interval information, which specifically includes the following steps:

[0079] Step S1, derive the arrival time sequence of the mixed superflatable pulse from the selection radar reconnaissance data.

[0080] Step S2 determines whether or not the radar target in the arrival time sequence is determined in accordance with the number of elements and pulse density of the arrival time sequence.

[0081] When determining whether there is a radar target in the arrival time series, when the number of elements of the arrival time sequence is greater than the first preset threshold or when the pulse density is greater than the second preset threshold, it is determined that there is a radar target, which is continued at this time. Radar signal sorting, perform step S3;

[0082] When the number of elements of the arrival time sequence is less than or equal to the first preset threshold or when ...

Embodiment 2

[0151] like Figure 9 , The present embodiment provides a radar signal interval PRI sorting system based on information, which system comprises:

[0152] Arrival time sequence obtaining module M1, for deriving time of arrival of pulses from overlapping sequences are mixed to be sorted reconnaissance radar data;

[0153] Radar target determining module M2, the number of elements according to the arrival time series pulse density and determines whether the radar target arrival time sequence;

[0154] When the number of elements in the arrival time series than the first preset threshold value or the pulse density greater than a second predetermined threshold value, it is determined that the radar target using the difference sequence generation module M3 arrive at the radar pulses overlap mixed stream time difference calculating a multistage sequence, generating a difference sequence;

[0155] When the number of elements of the sequence being less than the arrival time equal to the fir...

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Abstract

The invention relates to a PRI interval information-based radar signal sorting method and system, and belongs to the field of radar signal processing; the method comprises the steps: carrying out the multi-stage difference calculation of an arrival time sequence of a mixed overlapping radar pulse flow, and generating a difference sequence; determining a neighborhood radius and a density threshold value of a density clustering algorithm according to distribution characteristics of the difference value sequence; according to the neighborhood radius and the density threshold value, performing density clustering on the difference value sequence by using a density clustering algorithm to obtain a plurality of clustered clusters; calculating the extraction priority of each cluster, and generating PRI interval information to be extracted for the cluster with the highest priority; extracting a radar pulse signal corresponding to the PRI interval information to be extracted by adopting an improved pulse sequence search method, wherein the improved pulse sequence search method is a pulse sequence search method with tolerance control. According to the method, the PRI estimation precision and the information dimension can be improved, so that the sorting success rate of the radar pulse signals is improved.

Description

Technical field [0001] The present invention relates to radar signal processing, and more particularly to a sorting method based on the radar signal interval PRI and system information. Background technique [0002] Radar signal sorting as one of the key technologies in the modern battlefield electronic warfare equipment, sorting the results directly affect the subsequent identification of the targets, precise positioning, threat determination and confrontation strategies. Conventional signal separation is based mainly on two parameters, one is the pulse width, the carrier frequency, azimuth, and pulse amplitude modulation type and other non-time parameter, the classification algorithm using the pulse signal from different radar separately; the other is using a pulse arrival time (time of arrival, TOA) extracts the parameters of the secondary pulse repetition interval, which includes the same features repeating regularity radar signal in the time domain, with a pulse signal from ...

Claims

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Application Information

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IPC IPC(8): G01S13/88G06F17/15G06F17/16
CPCG01S13/88G06F17/15G06F17/16
Inventor 王磊胥辉旗曾维贵张志勇李湉雨陈美杉钱坤
Owner NAVAL AERONAUTICAL UNIV
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