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Towed interference suppression method based on complementary discrete chaotic phase encoding waveform design

A waveform design and phase encoding technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as threat, missile loss, and guidance failure, and achieve the goal of reducing range side lobes, reducing autocorrelation side lobe peaks, and increasing complexity. Effect

Active Publication Date: 2020-06-05
西北工业大学太仓长三角研究院 +1
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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

Method used

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  • Towed interference suppression method based on complementary discrete chaotic phase encoding waveform design
  • Towed interference suppression method based on complementary discrete chaotic phase encoding waveform design
  • Towed interference suppression method based on complementary discrete chaotic phase encoding waveform design

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Embodiment

[0052]Embodiment: The present invention completes verification on the Matlab simulation platform. The specific simulation parameters are: radar signal bandwidth 20MHz, signal time width 40μs, pulse repetition period 200μs, sampling frequency 40MHz, and pulse number 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 each velocity gate of the radar is 23m / s. The distance of the false target is 8km, the speed is 300m / s, and the suppression ratio of the interference signal to the echo signal of the real target is K=4.

[0053] The present invention comprises the following steps:

[0054] Step 1: Generate a discrete chaotic phase encoding sequence. By giving an initial state, the Bernoulli chaotic sequence {x l (n)}. After the chaotic sequence is generated, the threshold quantization method is used to quantize the code to make it convenient for practical application, and to generat...

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Abstract

The invention relates to a towed interference suppression method based on complementary discrete chaotic phase encoding waveform design. A complementary sequence is introduced into a traditional radartransmitting waveform design based on a discrete chaotic sequence; complementary discrete chaotic phase coded signals are transmitted in each period of a radar, so that the distance sidelobe of a radar pulse compression result is effectively reduced, the complexity of waveform design is increased, and the towed interference suppression performance based on discrete chaotic sequence waveform design is effectively improved.

Description

technical field [0001] The invention belongs to the electronic countermeasure technology in the radar signal processing algorithm, and uses the deceptive towed interference suppression method designed based on the radar transmission waveform of the complementary discrete chaotic phase code to effectively suppress the deceptive interference signal emitted by the towed decoy jammer, Improved seeker anti-tow performance. Background technique [0002] Radar, as an important means of long-range target detection in modern military operations, will inevitably face a complex electromagnetic interference environment under wartime conditions, and the towed active radar decoy (Towed Radar Active Decoy, TRAD) is a typical dual point source Jamming mode, as an emerging self-defense jamming device, has shown excellent jamming performance in actual combat, and has created a huge threat to the current missile-mounted radar seeker tracking combat aircraft. The towed jamming is mainly used t...

Claims

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Application Information

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Patent Type & Authority Applications(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
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