Interference characteristic extraction method based on projection transformation

A technology of projection transformation and feature extraction, applied in radio wave measurement systems, instruments, etc., can solve problems such as the depth gap of research, insufficient research system, gap between experimental verification and application, etc., to achieve good real-time performance, simple principle, guarantee The effect of target detection and admission tracking capabilities

CN106226744AActive Publication Date: 2016-12-14NANJING LES ELECTRONICS EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-12-14

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Abstract

The invention discloses an interference characteristic extraction method based on projection transformation. The interference characteristic extraction method comprises following steps of: 1, calculating radar parameters; 2, interference sensing: sensing interference environment and judging whether interference exists or not; 3, interference positioning: calculating an interference orientation center and the interference strength and positioning an interference source; 4, projection transformation: selecting interference data of an interference strength concentration region, and adopting a projection transformation method to calculate a projection characteristic matrix; 5, interference slope characteristic extraction: carrying out characteristic counting on the projection characteristic matrix, analyzing characteristic distribution in the orientation, and calculating interference slope characteristics; and 6, feeding back the interference slope characteristics to a radar system.
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Description

technical field

[0001] The invention relates to an interference feature extraction method, in particular to an interference feature extraction method based on projection transformation. Background technique

[0002] An important feature of modern military electronic technology is that various weapons and equipment are more and more widely used and depend on radio technology. The display of the power of various weapons and equipment, the monitoring and alerting of theaters, the deployment, contact and control of various arms cooperative operations, etc., all rely more and more on the effectiveness of radar. Therefore, electronic warfare has become another dimension of modern warfare. On the battlefield, suppressive and deceptive active electronic jamming will run through the entire process of warfare, making radars face an increasingly complex electromagnetic environment.

[0003] The comprehensive electronic jamming technology developed rapidly in recent years poses a serio...

Examples

Embodiment

[0052] 1 pair image 3 The radar actual measurement data analysis shown, the radar works in the MTI system, the distance resolution unit is 30m, the distance unit is 4000 (120km in total), the antenna scans 6 revolutions per minute, the pulse repetition frequency is 300Hz, and the word length of the collected data is 8 bits (0-255) .Divide the 360° area of ​​the radar scan into 4096 azimuth units, and obtain the average value of noise on each azimuth unit, that is, the azimuth noise power; the noise estimation is obtained by selecting the smallest data for all azimuth units. After calculation, the average value of the noise power is 18, and the radar azimuth noise power is shown in figure 2 .

[0053] 2. Perceive the interference environment: compare the noise power estimation of the azimuth with the threshold, the threshold is determined by the noise estimate, the noise estimate is 18, the threshold is 20, and the azimuth exceeding the threshold is considered to have interf...