基于压缩感知的抗SDIF分选射频隐身信号设计及回波信号处理

doi:10.7527/S1000-6893.2022.27934

Abstract

Abstract:

Radio Frequency （RF） stealth anti-sorting technology can improve the battlefield survival rate of radar， and is one of the research hotspots in the field of radar. In this paper， the signal design principle of anti-SDIF sorting is studied based on the main sorting algorithm of Sequence Difference histogram （SDIF）. On this basis， a piecewise linear chaotic system with interval number parameterization is designed based on random disturbance， and a method of using chaotic system to modulate the signal pulse repetition period with wide interval is proposed. Then， considering that it is difficult to use the traditional signal processing method to deal with the highly random anti-sorting signal designed in this paper in terms of velocity measurement， the compressed sensing technology is used to process the echo of the signal designed in this paper and to solve the velocity and distance of the detection target. Finally， simulations are carried out to verify the correctness of signal design principle， the performance of chaotic system， the anti-sorting performance of the designed signal， and the recovery and reconstruction performance of the signal by compressed sensing. The results show that the signal design principle presented in this paper can be used for signal design， the performance of interval number parametric piecewise linear chaotic system is better than that of the classical one-dimensional chaotic system， the anti-sorting signal modulated by the chaotic system can achieve anti-SDIF sorting， and the anti-sorting signal designed in this paper can be processed to obtain the speed and distance of the target.

Key words: radar countermeasure, radio frequency stealth, anti-sorting, signal design, chaotic system, compressed sensing, signal processing

CLC Number:

V243.2

Jinwei JIA, Limin LIU, Zhuangzhi HAN, Hui XIE. Design of anti-SDIF radio frequency stealth signal and echo signal processing technology based on compressed sensing[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(13): 327934-327934.

Figures/Tables 31

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Table 1

Fig.13

Table 2

Fig.14

Fig. 15

Table 3

Signal simulation parameter setting

参数类型	中心值	参数变化量	容差	相邻脉冲间参数最小间隔
PRI/ms	1.5	$1$	$0.05$	$0.1$
RF/GHs	2	1	0.1	0.2

Table 3

Fig.16

Fig.17

Fig.18

Fig.19

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Fig. 21

Fig.22

Fig.23

Table 4

Setting of simulation parameters

参数	数值	参数	数值
$P R I 1$ / $μ s$	10	$P R I 4$ / $μ s$	100
$P R I 2$ / $μ s$	11	$P R I 5$ / $μ s$	110
$P R I 3$ / $μ s$	12	$P R I 6$ / $μ s$	120
中心频率/GHz	60	调频率/（ $M H z ⋅ μ s$ ^-1）	25
脉冲宽度/ $μ s$	3

Table 4

Table 5

Setting of simulation parameters under three targets

参数	数值	参数	数值
中心载频/GHz	3	脉冲重复周期/ms	1
载频最大变化量/GHz	0.3	脉冲重复周期最大变化量/ms	0.1
带宽/MHz	50	脉冲宽度/ $μ s$	200
一个CPI内脉冲个数	64	信噪比/dB	30
不模糊距离均分段数	64	不模糊速度均分段数	64
仿真时长/ms	64

Table 5

Fig.24

Fig.25

Fig.26

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r	Logistic	Cubic	Chebyshev	本文所提映射
0.5	7.258 4×10 ^-7	8.219 9×10 ^-7	2.764 1×10 ^-5	1.933 1
1.0	2.076 4×10 ^-5	2.927 0×10 ^-5	0	1.557 2
1.5	7.189 0×10 ^-7	0	0.610 3	1.690 1
2.0	1.842 2×10 ^-7	0.010 7	0.711 3	1.684 2
2.5	8.289 3×10 ^-7	0.60	0.854 3	1.294 3
3.0	0.011 1	1.130 1	1.014 6	1.030 5
3.5	0.001 6	0	1.097 6	1.000 2
4.0	0.70	0	1.231 1	0.986 2

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Design of anti-SDIF radio frequency stealth signal and echo signal processing technology based on compressed sensing

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