基于最优模糊数的旋转干涉仪测向解模糊算法  

Direction Finding and Deblurring Algorithm of Rotary Interferometer Based on Optimal Fuzzy Number

作　　者：陈祎 张天键 吴迎春 蒋驰 史方明 CHEN Yi;ZHANG Tianjian;WU Yingchun;JIANG Chi;SHI Fangming(Shanghai Radio Equipment Research Institute,Shanghai 200090,China)

机构地区：[1]上海无线电设备研究所,上海200090

出　　处：《电子信息对抗技术》2023年第4期32-38,共7页Electronic Information Warfare Technology

摘　　要：被动雷达测向是电子侦测领域的一个重点研究内容,现有成果也较为丰富,但是实际应用中测向解模糊及测向精度提升问题一直是研究的难点。针对旋转体制单基线干涉仪测向,提出一种基于最优模糊数的高精度测向解模糊算法。首先推导了旋转干涉仪侦收天线接收信号相位差数学模型,厘清相位模糊问题产生机理;然后利用天线旋转特性将单基线转换为多基线;最后基于目标真实角度方向照射多基线干涉仪模糊数趋近于整数这一物理性质构建最优化方程组,利用角度粗搜索加精搜索的方式实现方程组解模糊计算及目标角度高精度测量。理论仿真结果表明,该算法能够适应高达40 GHz的频段范围,±40°的视场范围以及±20°的随机相位噪声。相比于传统的数字积分测向算法和相位差分测向算法,该算法受平台抖动影响较小,测向解模糊能力更强,在电子侦察领域有较强的工程应用价值。Passive radar direction finding is an important research content in the field of electronic detection,and the existing achievements are relatively rich.However,in practical application,the fuzzy solution of direction finding and the improvement of direction finding accuracy are always the difficulties in the research.For the direction finding of rotating single baseline interferometer,a high-precision direction finding algorithm based on optimal fuzzy number is proposed.Firstly,the mathematical model of the phase difference of the received signal by the detection antenna of the rotating interferometer is derived,and the mechanism of the phase ambiguity is clarified.Then the single baseline is converted into multiple baseline by using the antenna rotation characteristic.Finally,the optimization equations are constructed based on the physical property that the fuzzy number of the multi-baseline interferometer irradiated by the real angle direction of the target tends to be an integer.The fuzzy calculation of the solution of the equations and the high-precision measurement of the target angle are realized by the way of rough angle search and fine angle search.Theoretical simulation results show that the algorithm can adapt to frequency range up to 40 GHz,±40°field of view and±20°random phase noise.Compared with the traditional digital integral direction finding algorithm and phase difference direction finding algorithm,this algorithm is less affected by platform jitter,and has stronger ability to resolve fuzzy direction finding,which has strong engineering application value in the field of electronic reconnaissance.

关 键 词：旋转体制 单基线 干涉仪 解模糊 测向精度 

分 类 号：TN971.1[电子电信—信号与信息处理]