基于SDIF门限失效的雷达射频隐身信号设计原理

doi:10.12305/j.issn.1001-506X.2023.06.13

Abstract

Abstract:

Anti-sorting signal is an important direction of radio frequency (RF) stealth signal. It is based on the principle of anti-sorting signal design. In essence, the basis of the anti-sorting signal design is the failure principle of radar signal sorting algorithm. Sequential difference histogram (SDIF) algorithm is a core sorting algorithm widely used in engineering field. Firstly, SDIF algorithm is analyzed in detail in this paper. It is pointed out that the threshold function of SDIF algorithm will fail when the signal pulse repetition interval (PRI) value obeys the interval distribution whose length is more than 20 times of the PRI minimum interval, and the conclusion above is then proved by formula derivation. At last, the correctness of SDIF threshold failure principle is further verified by signal simulation, sorting system experiment and signal contrast experiment. The principle of SDIF sorting threshold failure provides theoretical support for anti-sorting RF stealth signal design and can improve the design efficiency of RF stealth anti-sorting signal.

Key words: electronic countermeasures, radio frequency stealth, sequence difference histogram, principle of sorting failure, pulse repetition interval (PRI), interval distribution

CLC Number:

TN974

Jinwei JIA, Zhuangzhi HAN, Limin LIU, Hui XIE. Design principle of radar radio frequency stealth signal based on SDIF threshold failure[J]. Systems Engineering and Electronics, 2023, 45(6): 1693-1701.

Figures/Tables 14

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仿真情形	PRI值/μs	脉冲总数	每一个PRI的脉冲数量
1	100	1 000	1 000
2	100, 210	1 000	500
	150, 210	1 000	500
	100, 110	1 000	500
3	100, 150, 190	999	333
	100, 150, 240	999	333
	150, 240, 270	999	333
	230, 250, 270	999	333
4	[100, 200]	1 000	—

实验次数	分选系统输出结果	脉冲搜索数量	分选结果η/%
1	295	3	0.3
2	247	2	0.2
3	302	0	0
4	289	7	0.7
5	285	4	0.4
6	264	3	0.3
7	213	1	0.1
8	275	8	0.8
9	241	12	1.2
10	287	3	0.3

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Design principle of radar radio frequency stealth signal based on SDIF threshold failure

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