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Drag -type interference inhibitory method based on complementary discrete chaos phase encoding waveform design

A waveform design and phase encoding technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of guidance failure, missile loss, threats, etc., to reduce the autocorrelation side lobe peak value and improve the performance of towed interference suppression.

Active Publication Date: 2022-08-05
西北工业大学太仓长三角研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The towed jamming is mainly used to jam the tracking radar of the locked aircraft. The deceptive or suppressed jamming signal is launched by the external TRAD to form a dual-point source jamming to the seeker, deceiving the tracking point of the tracking radar, and causing the missile to lose its "sight". Guidance failure, which poses a huge threat to the radar seeker using the pulse system

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  • Drag -type interference inhibitory method based on complementary discrete chaos phase encoding waveform design
  • Drag -type interference inhibitory method based on complementary discrete chaos phase encoding waveform design
  • Drag -type interference inhibitory method based on complementary discrete chaos phase encoding waveform design

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Embodiment

[0052]Example: The present invention is verified on the Matlab simulation platform. The specific simulation parameters are: radar signal bandwidth 20MHz, 40 μS width at the signal, 200 μs of the pulse repetition period, 40MHz sampling frequency, and 16. The real target distance is 5km and the speed is 200m / s. After calculation, the distance sampling point corresponding to the target is 1333, and the radar speed wave door is 23m / s. The fake target distance is 8km and the speed is 300m / s. The interference signal suppression ratio of the real target echo signal is K = 4.

[0053] The present invention includes the following steps:

[0054] Step 1: Generate discrete chaotic phase encoding sequences. By given a initial state, Bernoulli chaos sequences {x l (n)}. After generating a chaotic sequence, quantitative encoding with a quantitative method to make it easy to make it easy to act, produce the available phase encoding sequence {A l (n)}, repeat the process to get the original seque...

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Abstract

The invention relates to a towed interference suppression method based on complementary discrete chaotic phase coding waveform design. A complementary sequence is introduced into the traditional discrete chaotic sequence-based radar transmitting waveform design, and the complementary discrete chaotic phase coding signal is transmitted in each period of the radar by using the complementary sequence. , which effectively reduces the range side lobes of radar pulse compression results and increases the complexity of the design waveform, thereby effectively improving the performance of drag interference suppression based on discrete chaotic sequence waveform design.

Description

Technical field [0001] The present invention belongs to the electronic confrontation technology in the radar signal processing algorithm. It uses a radar emitting waveform design based on a complementary discrete chaos. Improve the anti -drag -type interference performance of the guide head. Background technique [0002] As an important long -range target detection method in modern military operations, radar will inevitably face a complex electromagnetic interference environment under the conditions of war, and the drag -proof radar bait (TOWED RADAR Active Decoy (Trad) is a typical dual source source source The interference mode, as an emerging self -defense interference device, shows excellent interference performance in actual combat, has pose a huge threat to the current radar -guided radar guide tracking combat aircraft. Drag -type interference is mainly used to interfere with the tracking radar that locks the aircraft. The deception or pressing interference signal is launch...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36G01S7/41
CPCG01S7/36G01S7/41G01S7/415
Inventor 智永锋
Owner 西北工业大学太仓长三角研究院