阵列雷达时空多维域编码抗主瓣转发式欺骗干扰方法  

Main-lobe Deceptive Jammers with Array Radars Using Space-time Multidimensional Coding

作　　者：兰岚[1] 张翔[1] 许京伟[1] 廖桂生[1] LAN Lan;ZHANG Xiang;XU Jingwei;LIAO Guisheng(National Key Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学雷达信号处理全国重点实验室,西安710071

出　　处：《雷达学报(中英文)》2025年第2期439-455,共17页Journal of Radars

基　　金：国家自然科学基金(62471348,62101402,61931016);中央高校基本科研业务费专项资金资助(YJSJ25008)。

摘　　要：随着电子技术的快速发展,雷达面临的电磁环境日益复杂。当存在主瓣有源欺骗干扰时,传统相控阵雷达自适应波束形成抗干扰失效,主瓣干扰抑制已成为雷达领域亟待解决的共性难题。该文针对来自主瓣的自卫式转发干扰,提出了一种时空多维域编码抗主瓣欺骗式干扰方法。首先,设计发射通道-脉冲-子脉冲编码,在接收端采用多普勒分多址方法实现了发射信号分离。针对目标高速运动导致的分离错位现象,提出一种基于波束形成能量差的移位数估计方法。随后,利用目标与干扰的延时相位差,设计收发联合的双重编码相位补偿方法,在发射空间频率域实现对真实目标、跨脉冲转发干扰、脉内转发干扰的区分,并且通过构建联合发射-接收权矢量,对主瓣欺骗式干扰进行空域滤波抑制。针对实际中波达角度(DOA)误差造成的抗干扰性能下降问题,构建了以最大化输出信干噪比(SINR)为目标函数的约束优化问题,基于交替迭代算法对接收权矢量,发射编码系数、接收编码系数分别进行优化。仿真实验验证了所提方法相比于其他雷达体制在抗主瓣欺骗干扰方面的有效性,其中相比于传统MIMO雷达,所提阵列时空多维域编码技术在4个主瓣干扰存在的情况下SINR可提升34 dB。With the rapid development of electronic technology,the electromagnetic environment is becoming increasingly complex.For instance,adaptive beamforming cannot suppress main-lobe jammers for traditional phased array radars;therefore,developing measures to tackle this common problem is an urgent need in radar technology.This study addresses the problem of main-lobe deceptive jammer suppression using space-time multidimensional coding.The first step is to design a three-dimensional phase coding scheme applicable across transmit channels,pulses,and subpulses.A Doppler division multiple access technique is employed at the receiver to separate the transmit signals.To solve the problem of waveform misalignment caused by high-speed moving targets,a novel approach is proposed to estimate the compensation index according to differences in beamforming energy.Subsequently,a dual-phase compensation method that leverages the phase differences between the main-lobe deceptive jammers and the target is proposed;this method can distinguish the true target,pulse-delayed jammers,and rapidly generated jammers in the transmit spatial frequency domain.Moreover,spatial filtering is applied to suppress all the main-lobe deceptive jammers by designing an appropriate transmit-receive weight vector.Additionally,an optimization problem aiming to maximize the output Signal-to-Interference-plus-Noise Ratio(SINR)is formulated to address the problem of performance degradation due to the Direction of Arrival(DOA)Errors.Further,to solve this problem,an alternating optimization method is utilized to obtain the optimized weight vector and transmit and receive coding coefficients iteratively to improve the SINR.Simulation results demonstrate that the proposed method suppresses the main-lobe deceptive jammers more effectively than other radar frameworks.Specifically,compared to the conventional multiple-input multiple-output radar,the proposed method achieves an SINR improvement of 34 dB in the presence of four main-lobe deceptive jammers.

关 键 词：阵列雷达 主瓣欺骗干扰抑制 时空多维域编码 DOA误差 收发联合优化 

分 类 号：TN957[电子电信—信号与信息处理]