基于方向图的机载PD雷达中重频设计  

Medium PRF Design for Airborne Pulse Doppler Radar Based on Antenna Pattern

作　　者：刘扬[1,2] 郭锋 顾宗山 伍政华[1,2] 姜文东 LIU Yang;GUO Feng;GU Zongshan;WU Zhenghua;JIANG Wendong(The 38th Research Institute of China Electronics Technology Group Corporation,Hefei 230088,China;Key Laboratory of Aperture Array and Space Application,Hefei 230088,China;State Grid Zhejiang Electric Power Co.,Ltd,Hangzhou 310007,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088 [2]孔径阵列与空间探测安徽省重点实验室,安徽合肥230088 [3]国网浙江省电力有限公司,浙江杭州310007

出　　处：《雷达科学与技术》2020年第1期39-43,共5页Radar Science and Technology

基　　金：国家电网科技项目(No.5211TZ18000V)。

摘　　要：机载脉冲多普勒雷达常采用中重频工作,能够避免低重频无法在频域实现目标探测和高重频对天线副瓣的高要求,并可以实现距离和速度解模糊。中重频的设计优选是雷达系统设计中的一项核心工作,为了有效提升机载脉冲多普勒雷达距离和多普勒二维可见区比率,提升强地杂波环境探测能力,本文提出一种基于天线方向图的机载雷达中重频设计方法,使用天线方向图进行杂波谱计算,并基于杂波谱完成重频遮蔽计算,再运用模拟退火算法获得优选重频组合,仿真表明该方法有很好的实用效果。Airborne pulse Doppler radars often use medium pulse repetition frequency(PRF)not only to solve the range and Doppler ambiguities,but also to avoid incapability of target detection in frequency domain caused by low PRF and high requirements of antenna sidelobe level caused by high PRF.The medium PRF optimization is one of the core tasks in radar system design.To improve the ratio of noise limited detection area in range-Doppler map and the detection capability in strong ground clutter environments,a novel method by leveraging antenna pattern for airborne pulse Doppler radar medium PRFs design is proposed in this paper.More specifically,the proposed approach calculates the clutter spectrum using antenna pattern to acquire noise limited detection area in range-Doppler map,and then optimized PRFs are obtained by simulated annealing algorithm.The simulation results demonstrate the good effect of this work.

关 键 词：机载脉冲多普勒雷达 天线方向图 中重频 距离多普勒遮蔽 

分 类 号：TN959.73[电子电信—信号与信息处理]