摘要
双源分辨(Two-target Resolution,TR)算法使四通道单脉冲雷达能够估计位于3 dB波束主瓣内不可分辨双目标的空域角度。然而,由于非矩形阵列天线方向图的不一致,导致了TR算法的实际应用受限。针对这种情况,本文提出了一种用于非矩形阵列极化单脉冲雷达的双脉冲双源分辨(Dual-pulse Two-target Resolution,DTR)方法。该方法通过求解由两个连续脉冲信号得到的8个方程,建立了仅在目标实际角度处存在零点的匹配函数,并且该函数消除了由非矩形阵列引起的估计误差。通过搜索匹配函数的零点,可以精确估计出两个不可分辨目标的角度。此外,通过锐化融合从全极化交错子阵(Full-polarization Interlaced Subarray Partition,FISP)的两个主极化通道获得的两个匹配函数,消除了两目标具有相似方位角或仰角时的角度估计模糊,并且实现了更精确的角度估计。仿真实验证明了DTR方法的卓越性能。
The two⁃target resolution(TR)algorithm enables four⁃channel monopulse radar to estimate the loca⁃tions of the unresolved two targets within the 3 dB beamwidth.However,the algorithm mentioned above has limited prac⁃tical use due to the antenna pattern distortion of nonrectangular array.For this case,a dual⁃pulse two⁃target resolution(DTR)method for polarized monopulse radar with a nonrectangular array configuration is proposed in this paper.By solving the eight equations from the received signals of two continuous pulses and matching functions with nulls at the real locations of the targets are established,the proposed method eliminates the errors caused by the nonrectangular ar⁃ray configuration.By searching the nulls,the locations of the two unresolved targets can be estimated.Moreover,by sharpening and fusing the matching functions derived from two polarized channels of full⁃polarization interlaced subar⁃ray partition(FISP),the angle ambiguity of targets with similar azimuth or elevation angles are eliminated,and more ac⁃curate angle estimates are achieved.Simulations demonstrate the superior performance of the DTR approach.
作者
王宇飞
马佳智
唐江澜
施龙飞
WANG Yufei;MA Jiazhi;TANG Jianglan;SHI Longfei(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)
出处
《雷达科学与技术》
北大核心
2023年第3期247-254,共8页
Radar Science and Technology
基金
国家自然科学基金(No.61901496,61921001)。
关键词
四通道单脉冲雷达
极化雷达
交错子阵
非矩形天线阵列
双源分辨
four⁃channel monopulse radar(FCMR)
polarized radar
interlaced subarray partition
nonrectangu⁃lar array
two⁃target resolution(TR)
