目标一维距离像特征提取方法研究

针对雷达目标一维距离像的姿态敏感性和平移敏感性,直接将一维距离像用于目标识别很难取得好的识别效果,用目前的普遍做法进行目标识别存在计算量和存储量大的问题,提出把一维距离像作为随姿态变化的序列及强散射中心维数、目标特征尺寸、散射中心分布熵三个特征,并以这三个特征采用外场实测数据进行目标识别实验,取得了较好的识别效果。

Study of method of range profile feature extraction

Range profile of radar target shows the range bin structure of targets, so it is applied abroad in high-resolution radar target recognition; but range profile is sensitive to the pose of targets, so it is very hard to obtain a satisfactory result to apply range profile to target recognition directly. Range profile is viewed as a sequence which changes with pose of targets, and three new concepts: strong scattering center dimension, target feature size and scattering center distribution entropy are put forward. Then, we use these three features to identify targets based on real data and obtain a good result.