摘要
本文着重研究基于高分辨率雷达视频回波的目标特征提取问题。提出了基于ＡＲ模型动态地获取目标极点信息，利用获取的目标极点信息对线性调频变换进行初始参数的设置，雷达视频回波经基于此参数线性调频变换获得高分辨率频谱特征的新方法，并用这种方法对实地录取的地面目标视频回波数据进行处理提取高分辨率频谱特征。最后，利用所构造可分性测度计算了该模式特征的可分性测度值并与付里叶谱特征的可分性测度值比较，证明本文提出的方法具有更好的可分性，是一种良好的高分辨率目标频谱特征提取方法。
The target feature extraction about high resolution radar video echo is studied in this paper. A method to obtain target poles’ information based on AR model and to use obtained poles’ information for Chirp z transform's parameters initializing is proposed, and then radar video echo via Chirp z transform can obtain high resolution spectrum estimation. The practical ground high resolution radar video data is processed by this method and high resolution spectral feature has been extracted. Finally, We construct a distinguishable measure and compare the features extracted by Fourier transform with the features extracted by Chirp z transform.The results prove that this new method has better distinguishable measure value and is suitable for high resolution target spectral feature extraction.
出处
《系统工程与电子技术》
EI
CSCD
1998年第1期29-33,共5页
Systems Engineering and Electronics
