机载雷达脉间波形参数伪随机跳变技术

崔国龙; 樊涛; 孔昱凯; 余显祥; 沙明辉; 孔令讲

doi:10.12000/JR21189

机载雷达脉间波形参数伪随机跳变技术

doi: 10.12000/JR21189

1.
电子科技大学信息与通信工程学院成都 611731
2.
北京无线电测量研究所北京 100854

基金项目: 国家自然科学基金(61771109, U19B2017, 62101097)，长江学者奖励计划，中国博士后科学基金(2020M680147, 2021T140096)

详细信息

作者简介:
崔国龙(1982–)，男，安徽人，电子科技大学教授，博士生导师，《雷达学报》编委。研究方向为最优化理论和算法、雷达目标检测理论、波形多样性以及阵列信号处理等

樊　涛(1997–)，男，江西人，电子科技大学在读博士生。研究方向为雷达波形设计与处理、最优化理论和算法以及雷达杂波抑制等

孔昱凯(1996–)，男，河南人，电子科技大学在读博士生。研究方向为雷达杂波抑制、干扰智能认知以及雷达抗干扰波形设计等

余显祥(1991–)，男，四川人，电子科技大学博士后。研究方向为雷达波形设计与处理、最优化理论算法以及阵列信号处理等

沙明辉(1986–)，男，研究员。研究方向为雷达抗干扰和信号处理等

孔令讲(1974–)，男，河南人，电子科技大学教授，博士生导师，《雷达学报》编委。研究方向为新体制雷达、统计信号处理、优化理论和算法、雷达信号处理、非合作信号处理技术和自适应阵列信号处理等

通讯作者:
崔国龙 cuiguolong@uestc.edu.cn

责任主编：廖桂生 Corresponding Editor: LIAO Guisheng
中图分类号: TN958
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出版历程
- 收稿日期: 2021-11-26
- 修回日期: 2022-03-10
- 网络出版日期: 2022-04-11
- 刊出日期: 2022-04-28

Pseudo-random Agility Technology for Interpulse Waveform Parameters in Airborne Radar

1.
School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
Beijing Institute of Radio Measurement, Beijing 100854, China

Funds: The National Natural Science Foundation of China (61771109, U19B2017, 62101097), The Chang Jiang Scholars Program, China Postdoctoral Science Foundation (2020M680147, 2021T140096)

More Information

Corresponding author: CUI Guolong, cuiguolong@uestc.edu.cn

摘要

摘要: 机载雷达脉间波形参数伪随机跳变主要是通过优化设计脉冲重复间隔、初相、频率和幅度等参数，增加雷达波形的复杂度与不确定性，提升机载雷达反杂波和抗干扰能力，是机载雷达技术的主要发展方向之一。脉间参数的伪随机跳变给多脉冲相参积累、杂波谱特性建模等带来困难。该文建立了脉间参数伪随机跳变信号模型，提出了非均匀参数捷变脉间相参处理方法，并分析了抗干扰性能。在此基础上，研究了脉冲重复间隔捷变下的机载雷达杂波回波模型，提出了发射-接收滤波器联合优化设计的强杂波处理方法，并进行了仿真验证。
- 机载雷达 /
- 脉间波形 /
- 伪随机跳变 /
- 相参处理 /
- 杂波抑制
Abstract: The pseudo-random agility technology for interpulse waveform parameters in airborne radar increases the complexity and uncertainty of radar waveform and improves its anti-clutter and anti-interference ability by optimizing the pulse repetition interval, initial phase, frequency, and amplitude, which is one of the main developmental directions of airborne radar technology. The pseudo-random agility of interpulse parameters makes multi-pulse coherent accumulation and modeling of clutter spectrum characteristics difficult. In this paper, a pseudo-random agility signal model of interpulse parameters is established. Furthermore, a non-uniform parameter coherent processing method is proposed, and the anti-interference performance is analyzed. Based on the analysis, the clutter echo model of airborne radar with random pulse repetition interval is studied, and a joint transmitter-receiver filter design is proposed for strong clutter processing. Finally, numerical simulation is conducted to verify the results.
- Airborne radar /
- Interpulse waveform /
- Pseudo-random agility /
- Coherent processing /
- Clutter suppression

HTML全文

图 1 机载雷达探测场景示意图

Figure 1. Schematic diagram of airborne radar detection scene

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图 2 发射波形示意图

Figure 2. Diagrams of the transmitted waveforms

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图 3 脉间波形参数伪随机跳变信号相参处理流程

Figure 3. Coherent processing flow of interpulse parameter pseudo-random agility signal

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图 4 点目标距离门对齐示意图

Figure 4. Schematic diagram of point target range alignment

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图 5 距离门对齐和初相补偿处理结果

Figure 5. The results of range alignment and initial phase compensation

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图 6 相参积累结果

Figure 6. The results of coherent processing

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图 7 目标速度维结果

Figure 7. Target velocity dimension results

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图 8 欺骗干扰白化示意图

Figure 8. Schematic diagram of deception interference with whitening

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图 9 抗干扰效果

Figure 9. Anti-interference effect

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图 10 机载雷达杂波单元划分示意图

Figure 10. Schematic diagram of airborne radar clutter unit division

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图 11 机载雷达杂波谱

Figure 11. Clutter spectrum of airborne radar

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图 12 SGO算法收敛曲线

Figure 12. Convergence curve of SGO algorithm

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图 13 模糊函数比较

Figure 13. Contrast of ambiguity function

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图 14 机载雷达杂波抑制结果

Figure 14. The results of airborne radar clutter suppression

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表 1 杂波仿真参数

Table 1. Clutter simulation parameters

参数	数值	参数	数值
波长$\lambda $	0.03 m	载机高度$H$	8 km
相控阵规模$N \times N$	40×40	载机速度$V$	140 m/s
阵元间隔$d$	${\lambda \mathord{\left/ {\vphantom {\lambda 2}} \right. } 2}$	距离环间隔$\Delta R$	15 m
波束指向$\left({\theta }_{0},\,{\varphi }_{0}\right)$	(2°, –10°)	多普勒环间隔$\Delta f$	100 Hz
阵元加权类型	泰勒加权	最大多普勒频率${f_m}$	${{4V} \mathord{\left/ {\vphantom {{4V} \lambda }} \right. } \lambda }$
波束最大增益$G$	30 dB	杂波后向散射率模型	Morchin模型^[38]
雷达发射功率${P_{\text{T}}}$	10 kW	噪声功率$\sigma _{\text{w}}^2$	–130 dBW

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