间歇采样转发干扰的关键参数估计  

Parameter estimation of intermittent sampling repeater jamming

作　　者：周畅[1] 范甘霖 汤子跃[1] 朱振波[1] ZHOU Chang;FAN Ganlin;TANG Ziyue;ZHU Zhenbo(The First Department,Air Force Early Warning Academy,Wuhan Hubei 430019,China;Unit 93251,Chinese People's Liberation Army,Qiqihaer Heilongjiang 161000,China)

机构地区：[1]空军预警学院一系,湖北武汉430019 [2]中国人民解放军93251部队,黑龙江齐齐哈尔161000

出　　处：《太赫兹科学与电子信息学报》2019年第5期782-787,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(51309232,61671469);空军“十二五”预研基金资助项目(402040406)

摘　　要：间歇采样转发干扰主要利用宽带信号的多普勒容限特性实现多假目标干扰,雷达亟需有效的干扰先验知识进行对抗。针对该问题,以间歇采样转发干扰原理为基础,推导出干扰信号经雷达匹配接收后的互模糊函数,在深入分析函数定量关系后,基于Radon变换、最小二乘估计法对干扰采样周期和干扰占空比2个关键参数进行了估计。仿真结果分析了干噪比(JNR)和采样数据长度等因素对参数估计性能的影响,并验证了参数估计的有效性。Intermittent sampling repeater jamming is a new jamming technology of sending and receiving, in which the Doppler tolerance of the broadband signal is the main character utilized to achieve multiple false targets, therefore the priori knowledge of the jamming is in urgent need for radar antijamming.Aiming for this problem, firstly, the cross ambiguity function of the interference after matching filter is derived based on the principle of the intermittent sampling repeater jamming. Secondly, on the basis of the quantitative relationship of function, the sampling period and disturbance duty cycle are estimated by means of the Radon transform and least square estimation techniques.Finally, simulation results demonstrate the influence of the Jamming to Noise Ratio(JNR) and sampling data length on the parameter estimation performance, and also show the effectiveness of the proposed algorithm.

关 键 词：间歇采样转发干扰 互模糊函数 RADON变换 最小二乘估计 参数估计 

分 类 号：TN973[电子电信—信号与信息处理]