Radar signal sorting method based on PRI histogram

A radar signal sorting and radar signal technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as difficulties, large number of differences, high false alarms, etc., and achieve the effect of easy engineering implementation and simple and efficient processing methods

Active Publication Date: 2019-03-22
NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: the detection and discrimination threshold is not the best discrimination threshold; the false alarm is high when the pulse loss is serious; it is only suitable for the case of fixed PRI, and the number of differences required to be calculated is large and the harmonic problem is serious, etc.
The advantage of SDIF is

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radar signal sorting method based on PRI histogram
  • Radar signal sorting method based on PRI histogram
  • Radar signal sorting method based on PRI histogram

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0048] In the radar signal sorting method based on the PRI histogram provided by the embodiment of the present invention, the fixed signal is first extracted from the pulse stream of the radar signal, and then the jitter signal is extracted from the remaining pulse stream. The sorting methods mainly include: PRI histogram establishment and sequence search.

[0049] The establishment of PRI histogram adopts the idea of ​​overlapping PRI boxes, and different widths are used for fixed signals and jitter signals to establish different PRI overlapping boxes. Sequence search includes PRI estimation and sequence search based on PRI.

[0050] Such as figure 1Shown is the flow chart of fixed signal ex...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a radar signal sorting method based on a PRI histogram. The method comprises the following steps: establishing the PRI histogram of a radar signal pulse flow; sitting differentjitter ranges for a fixed signal and a dither signal; firstly extracting the fixed signal, and extracting the dither signal, specifically comprising: enabling a box mid-value of each PRI overlappingbox in the PRI histogram to compare with a discrimination threshold: if a value exceeding the discrimination threshold is not existent, zero-clearing the box mid-values of all PRI overlapping boxes inthe PRI histogram; otherwise, using a PRI value corresponding to a peak value exceeding the discrimination threshold as the possible PRI value for performing sequence search; if a sequence is successfully searched, eliminating a detected pulse from the radar signal pulse flow, otherwise, zero-clearing the box mid-values of all PRI overlapping boxes in the PRI histogram, and performing the next order of pulse extraction. The method is capable of improving sorting capacity of the dither signal, and has the better sorting effect to pulse data in a complicated environment.

Description

technical field [0001] The invention relates to a radar signal sorting method based on a PRI histogram, belonging to the technical field of electronic countermeasures. Background technique [0002] Radar signal sorting refers to the process of separating the pulses of the same radar and selecting useful signals from the randomly interleaved pulse stream received by the radar reconnaissance receiver. Pulse repetition interval (PRI) based methods have been one of the most studied and fruitful methods in signal sorting. PRI search method, PRI histogram, and PRI transformation are typical representatives of such methods. PRI histogram includes three typical methods: TOA difference histogram, cumulative difference histogram (CDIF) and timing difference histogram (SDIF). [0003] The TOA total difference histogram is to subtract each TOA from the subsequent TOA, and accumulate each TOA difference to obtain the total difference histogram of the pulse sequence. The main disadvant...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 钟晓星朱健康耿波
Owner NANJING CHANGFENG AEROSPACE ELECTRONICS SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap