摘要
针对传统波束形成算法的旁瓣效应在调频连续波多输入多输出(frequency modulated continuous wave multiple-input multiple-output,FMCW MIMO)雷达的成像结果中造成的方位向虚警问题,提出了一种基于方位向门限的改进成像算法。首先从原始数据中分别提取目标的距离向、方位向信息,然后单独将方位信息归一化之后使用门限检测实现了对方位向虚假目标的抑制,最后结合距离向信息与方位向信息得到了成像结果。仿真成像实验证明,该方法能使得成像结果中的虚警概率明显降低,外场实验的成像结果进一步验证了所提出算法出色的成像性能。
To solve the problem that false alarms caused by the grating lobes of traditional beamforming al- gorithms appear in the angular dimension of frequency modulated continuous wave multiple-input multiple-out- put （FMCW MIMO） radar＇s imaging results, an improved imaging algorithm based on azimuth threshold is proposed. First, the range information and azimuth information of targets are extracted from the original data separately, and then a detection threshold is applied to the azimuth data after normalization so as to limit the ap- pearance of false targets in angular dimension. Finally, range information and azimuth information are combined with each other to obtain the imaging results. Imaging simulation proves that the false alarm probability is obvi- ously reduced by the algorithm, and the results of field experiments further verify the remarkable imaging per- formance of the proposed algorithm.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2015年第12期2745-2750,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61571148)
中国博士后科学基金特别资助(2015T80328)
中国博士后科学基金(2014M550182)
黑龙江省博士后特别资助(LBH-TZ0410)
哈尔滨市科技创新人才专项(2013RFXXJ016)资助课题
关键词
多输入多输出雷达
调频连续波
波束形成
虚警
外场成像实验
multiple-input multiple-output （MIMO） beamforming
false alarm
field imaging experiment radar
frequency modulated continuous wave （FMCW）
