摘要
针对线调频连续波雷达双差拍-傅里叶处理中的多目标配对问题,提出一种距离-速度联合配对法。基于多周期积累的分析,得到对应于不同延时区间的二维谱峰值频率的表达式以及相应的解耦合公式。根据双差拍-傅里叶处理的特点定义了两次差拍处理各自的有效测量区间,利用目标距离信息剔除非有效区间的虚假目标。进一步分析了各区间谱峰距离频率的特点,制定了重叠区目标的判断准则,可以对重叠区内的目标进行正确分类并剔除虚假目标。最后结合MTD-速度配对原理,利用目标模糊多普勒信息完成最终的配对操作。仿真结果验证了本文方法的有效性。
To solve multi-targets pairing problem in double beat-FFT processing for linear frequency-modulated continuous wave （LFMCW） radar, a joint range-velocity pairing method is presented. Based on the analysis of multi-cycle integration, the frequency expressions of two-dimensional spectrum peaks and the corresponding decoupling formation are derived in terms of different time-delay intervals. An effective measurement zone is defined according to the characteristics of the beat signals, and range attribute is firstly used to exclude those false targets out of this zone. Then the judgement rule for the overlapped zone is formulated based on the property of range spectrum peaks. Finally combined with the MTD-velocity method, the accurate pairing of real targets is implemented. Simulation results demonstrate the effectiveness of the method.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第1期72-76,共5页
Systems Engineering and Electronics
