摘要
基于平飞双站SAR收发系统分置的特点,建立了正侧视模式下振动目标的回波信号模型,推导了由散射点振动引入的微多普勒调制的参数化表达式。理论分析表明,由目标振动引起的微多普勒调制不仅与其微动参数,载波频率有关,而且与系统的几何配置有关。文中着重讨论了目标振动方向,系统几何参数对微多普勒效应的影响,并由数值仿真验证了理论分析的正确性。
Based on the characteristic of bistatic SAR with parallel track,the signal model of vibrating targets of broadside made is established,and then the mathematical expression of micro-Doppler induced by target vibration is derived.The theoretical analysis indicates that the micro-Doppler signature is not only related to the parameters of micro-motion and carrier frequency,but also the system geometrical configuration.The influences on micro-Doppler effect caused by the vibration orientation and the geometry of system are discussed respectively,and some computer simulations are presented to verify the validity of the theoretical analysis.
出处
《电路与系统学报》
CSCD
北大核心
2011年第2期99-102,98,共5页
Journal of Circuits and Systems
基金
国家自然科学基金资助课题(60971100)
毫米波国家重点实验室基金资助课题(K200907)
关键词
双站SAR
平飞
微多普勒
bistatic SAR
parallel track
micro-Doppler
