基于时不变点状波束优化的目标距离-角度联合估计  

The Range-angle Estimation of Target Based on Time-invariant and Spot Beam Optimization

作　　者：初伟[1] 刘云清[1] 刘文宇 李晓龙[1] CHU Wei;LIU Yunqing;LIU Wenyu;LI Xiaolong(School of Electronics and Information Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学电子信息工程学院,长春130022

出　　处：《电子与信息学报》2022年第4期1366-1372,共7页Journal of Electronics & Information Technology

基　　金：吉林省科技发展计划项目(20190303080SF);长春理工大学青年科学基金(201915010011)。

摘　　要：应用频控阵式多输入多输出(FDA-MIMO)雷达实现目标距离-角度联合估计越来越受到人们的重视,利用FDA同时获得发射波束图在角度和距离的自由度。但其性能因波束图的周期性和时变性而降低。因此,该文基于时间调制和距离补偿FDA-MIMO(TMRC-FDA-MIMO)雷达的新波形合成模型,提出了一种改进的基于旋转不变技术的信号参数估计(ESPRIT)算法。最后,通过距离和角度估计的克拉默-拉奥下界和均方根误差,与固定频偏FDA-MIMO、对数频偏FDA-MIMO雷达系统和多信号分类(MUSIC)算法进行了对比,验证了所提方法的优异性能。The application of Frequency Diverse Array and Multiple Input Multiple Output(FDA-MIMO)radar to achieve range-angle estimation of target has attracted more and more attention.The FDA can simultaneously obtain the degree of freedom of transmitting beam pattern in angle and range.However,its performance is degraded due to the periodicity and time-varying of the beam pattern.Therefore,an improved Estimating Signal Parameter via Rotational Invariance Techniques(ESPRIT)algorithm to estimate the target’s parameters based on a new waveform synthesis model of the Time Modulation and Range Compensation FDA-MIMO(TMRC-FDA-MIMO)radar is proposed.Finally,the proposed method is compared with identical frequency increment FDA-MIMO radar system,logarithmically increased frequency offset FDA-MIMO radar system and MUltiple SIgnal Classification(MUSIC)algorithm through the Cramer Rao lower bound and root mean square error of range and angle estimation,and the excellent performance of the proposed method is verified.

关 键 词：MIMO 频控阵 时不变 空间聚焦 克拉默-拉奥下界 

分 类 号：TN959[电子电信—信号与信息处理]