摘要
旋转和振动是最常见的微动形式。目标微动会产生微多普勒效应,微多普勒特征对于目标识别与分类具有重要意义。微多普勒的存在使得目标主体的ISAR像受到污染,严重时无法识别。微多普勒对雷达分辨率极其敏感,因此宽带信号下的微多普勒研究十分必要。在线性调频步进信号体制下,引入相消处理的思想,在精分辨谱图域分离并提取微动目标的微多普勒信息,得到较为清晰的目标ISAR像,仿真验证了方法的有效性。
The rotation and vibration are the common moving forms of micro-motion.Micro-motion target would generate micro-Doppler effect,which has great significance for target classification and recognition,while micro-Doppler would severely contaminate the ISAR image of target’s main body,thus resulting in hard recognition.Micro-Doppler is very sensitive to the radar resolution,so it is necessary to study the micro-Doppler under wideband radar.Under step frequency chirp signal system,the idea of cancellation technique is introduced to separate and extract micro-Doppler in the refined spectrogram,then the fairly clear ISAR image of micro-motion target is thus obtained.Simulation results indicate the effectiveness of this algorithm.
出处
《通信技术》
2012年第9期82-85,共4页
Communications Technology
