抗间歇采样转发干扰的发射波形与失配滤波器联合优化算法

doi:10.12305/j.issn.1001-506X.2024.06.04

摘要/Abstract

摘要：

间歇采样转发干扰(interrupted sampling repeater jamming, ISRJ)与发射信号之间具有强相关性，若在接收端采用匹配滤波处理则会产生多个数量可控的高逼真假目标，对雷达的检测性能具有极大的干扰。针对上述问题，提出了一种抗ISRJ的发射波形和接收滤波器联合优化算法，将失配滤波体制下的信噪比(signal to noise ratio, SNR)损失、发射信号恒模约束以及滤波器能量约束考虑在内，以最小化干扰信号归一化脉压后峰值、失配滤波输出信号积分副主比以及输出干信比，并采用主分量最小化(majorization-minimization, MM)方法与平方迭代加速算法提高算法运行速度。仿真结果表明, 与其他同类方法相比，所提算法能在保证可靠抗干扰性能的同时，极大缩短运行时间，具有较好的实时性。

关键词: 间歇采样转发干扰, 失配滤波, 主分量最小化, 平方迭代方法, 恒模约束

Abstract:

Interrupted sampling repeater jamming (ISRJ) has a strong correlation with the transmitting signal, if the matched filtering processing is still adopted at the receiving end, multiple high-fidelity false targets with controllable quantity will be generated, which seriously affects the detection performance of radar. To solve the above problem, a joint optimization algorithm for transmitting waveform and receiving filter against the ISRJ is proposed, which takes into account the signal to noise ratio (SNR) loss under the mismatched filtering system, the constant modulus constraint of transmitting signal and the energy constraint of filter, to minimize the normalized peak of the interference signal after pulse compression, the ratio of the energy of the integral side lobe to main lobe and the interference to signal ratio of the output of the mismatched filter, the majorization-minimization (MM) method and the square iterative acceleration algorithm are adopted to accelerate the running speed of the proposed algorithm. The simulation results show that compared with other similar methods, the proposed algorithm can greatly shorten the running time and has better real-time performance on the basis of ensuring reliable anti-interference performance.

Key words: interrupted sampling repeater jamming (ISRJ), mismatched filter, majorization-minimization (MM), squared iterative method, constant modulus constraint

中图分类号:

TN974

刘茜, 戴奉周. 抗间歇采样转发干扰的发射波形与失配滤波器联合优化算法[J]. 系统工程与电子技术, 2024, 46(6): 1855-1866.

Qian LIU, Fengzhou DAI. A joint optimization algorithm for transmitting waveform and mismatched filter against interrupted sampling repeater jamming[J]. Systems Engineering and Electronics, 2024, 46(6): 1855-1866.

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参数	数值
发射信号时宽/μs	40
间歇采样重复周期/μs	10
采样序列时宽/μs	2.5
间歇采样占空比/%	25
发射信号长度	256

参数	发射信号与接收滤波器长度N
参数	16	32	64	128	256
发射信号与接收滤波器相关函数旁瓣峰值	-15.21	-22.75	-22.84	-27.69	-29.6
ISRJ信号与接收滤波器相关函数峰值	-24.24	-27.16	-27.66	-29.89	-31.28

信号长度	本文方法平均运行时间	文献[16]方法平均运行时间
16	0.137 5	0.449 0
32	0.883 2	1.514 9
64	2.413 2	7.244 5
128	34.295 2	73.168 0
256	105.757 4	318.943 5

算法	SNRL	输出积分主副比	输出信干比	干扰信号峰值
本文算法	1.324 6	-3.330 2	-3.207 1	-15.808 6
文献[16]方法	1.340 3	-4.041 6	-3.021 0	-13.629 4

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