摘要
间歇采样转发干扰(ISRJ)是一种先进的有源相干干扰技术,对雷达的探测性能有较大的影响,且现有抗ISRJ的方法需要求解复杂的波形优化问题以及需进行干扰识别和剔除。于是,在深入研究ISRJ的基础上,该文基于完全互补码提出一种抗ISRJ的方法。针对ISRJ时域采样不连续的特点,该文首先通过脉内频域正交的方法将完全互补码中的所有互补波形按照子脉冲掩护的方式编入单个脉冲雷达波形。然后,基于脉内分段脉冲压缩的处理方式,利用完全互补码波形的理想互相关和自相关特性,设计非匹配滤波器系数在抑制ISRJ的同时能得到较低的距离旁瓣。相比于现有抗ISRJ的方法,所提方法在线设计能力更强且无需进行干扰识别和剔除。仿真实验表明所设计波形能有效对抗多种样式的ISRJ且具有较高的多普勒容忍度。
Interrupted Sampling Repeater Jamming(ISRJ)is an advanced active coherent jamming technology,which has great influence on the detection performance of radar,and the existing anti-ISRJ methods need to solve complex waveform optimization problems and interference recognition and elimination.Therefore,on the basis of in-depth study of ISRJ,an anti-ISRJ method based on complete complementary codes is proposed.Considering the characteristics of ISRJ sampling discontinuity in time domain,all complementary waveforms in the complete complementary code are integrated into a single pulse radar waveform through sub-pulse cover using the method of orthogonal in the frequency domain.Then,based on the intra-pulse segmental pulse compression processing method,utilizing the ideal cross-correlation and autocorrelation characteristics of the complete complementary code waveform,the mismatched filter coefficients are designed to suppress ISRJ and obtain lower range sidelobes.Compared to existing anti-ISRJ methods,the proposed method has stronger online design capability and obviates the need for interference recognition and elimination.The simulation results demonstrate that the various ISRJs can be effectively suppressed by the designed waveform and has high Doppler tolerance.
作者
余涛
周正春
杜小勇
鲍庆龙
何元
YU Tao;ZHOU Zhengchun;DU Xiaoyong;BAO Qinglong;HE Yuan(School of Mathematics,Southwest Jiaotong University,Chengdu 610031,China;School of Information Science and Technology,Southwest Jiaotong University,Chengdu 610031,China;The College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;School of Communication and Information Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2023年第11期3896-3905,共10页
Journal of Electronics & Information Technology
基金
国家自然科学基金(62131016,62071397)。
关键词
间歇采样转发干扰
完全互补码波形
非匹配滤波
波形设计
多普勒容忍
Interrupted Sampling Repeater Jamming(ISRJ)
Complete complementary code
Mismatched filter
Waveform design
Doppler tolerance
