捷变频雷达联合脉内频率编码抗间歇采样干扰

doi:10.12305/j.issn.1001-506X.2022.11.11

Abstract

Abstract:

Intermittent sampling repeater jamming can produce coherent false targets in the current pulse repetition period by partially sampling and rapidly forwarding the radar signal, making the target detection based on traditional frequency agile radar face severe challenges. Therefore, an anti-intermittent sampling jamming method based on frequency agility radar and intra-pulse frequency coding is proposed. Aiming at the time-domain discontinuity of intermittent sampling jamming, the inter-pulse frequency agility and intra-pulse frequency coding are used to realize the mutual protection between sub-pulses. After pulse compression, Otsu is used to adaptively calculate the threshold and suppress the jamming firstly. And then the detection of targets is realized by the two-dimensional sparse reconstruction method. Theoretical analysis and simulation results show that the proposed method can effectively resist intermittent sampling jamming.

Key words: intermittent sampling jamming, frequency agility technique, intra-pulse frequency coding, Otsu, 2-D sparse reconstruction

CLC Number:

TN972

Shuxian DONG, Yinghui QUAN, Minghui SHA, Wen FANG, Mengdao XING. Frequency agile radar combined with intra-pulse frequency coding to resist intermittent sampling jamming[J]. Systems Engineering and Electronics, 2022, 44(11): 3371-3379.

Figures/Tables 18

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参数	数值	参数	数值
N	64	K	10
M	100	f₀/GHz	14
Δf/MHz	7	ΔF/MHz	80
T_{_sub}/μs	4	B_sub/MHz	5
R₀/km	10	v/(m/s)	20
PRT/μs	100	—	—

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Frequency agile radar combined with intra-pulse frequency coding to resist intermittent sampling jamming

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