正交频分LFM信号MIMO雷达的距离维高分辨  

High Range Resolution of MIMO Radar with OFD-LFM Signal

作　　者：胡蜀徽[1] 唐佳[1] 王志华[1] 冉财章 

机构地区：[1]中国电子科技集团公司第二十九研究所,四川成都610036

出　　处：《雷达科学与技术》2014年第6期585-591,共7页Radar Science and Technology

摘　　要：MIMO雷达即多输入多输出雷达,发射时分为多个子阵,每个子阵发射的信号载频相差固定频率并满足正交关系,其信号模型及处理方法类似于步进频率雷达。由于信号之间的正交性,利用匹配滤波提取出不同频率的发射信号分量,然后相参合成实现距离维高分辨,同时还可以完成测速、测距和相参积累等功能。首先给出了MIMO雷达的信号模型,然后分析了正交频分线性调频信号的互相关特性,推导出了距离维高分辨合成处理的数学模型,分析了速度对合成效果的影响及解决方法,最后通过仿真实验证明了理论分析的正确性。MIMO radar has multiple antennas on transmit.Each antenna emits orthogonal signal and frequency difference between signals is fixed.The signal model and signal processing of MIMO radar are sim-ilar to stepped-frequency radar.On receive,due to the orthogonal character,a bank of matched filters is used to separate and extract each transmit signal of different frequencies.Then high range resolution is implemen-ted by coherent combination.The velocity and distance detection and the coherent integration can be also achieved.Firstly,signal model of MIMO radar is proposed,and then the cross-correlation of OFD-LFM sig-nal is analyzed.The mathematic model of high resolution range combination method is deduced.The influ-ence of velocity on the combination effect is analyzed and the resolving method is derived.The simulation val-idates the correctness of the proposed theoretical analysis.

关 键 词：多输入多输出 正交性 匹配滤波 相参合成 高分辨 

分 类 号：TN957[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]