摘要
本文将分数阶相关引入到互模糊函数的计算中,提出了一种基于分数阶相关的无源雷达动目标检测方法.与基于FFT计算互模糊函数的方法相比,采用这种方法的优点是在检测目标时可以只扫描某个环形扇区而不用计算整个模糊平面,减小了计算量;另外,由于在计算互模糊函数时极角和极径的取样间隔可以任意选择,突破了时域采样间隔的限制,可在时延和频移上均得到高精度估计.最后通过仿真实例验证了该方法的有效性.
A new method for passive radar MTD based on fractional correlation is presented by introducing the fractional correlation into the computation of the cross-ambiguity function （CAF）. Compared with the FFT-based computation to CAF, the presented method can scan the target only in certain circular sector instead of the whole ambiguity plane, which may decrease the computational load. In addition, since sampling interval of both the angle and the radial can be chosen arbitrarily in the computation of the CAF, it removes the restriction of original time interval, and may provide the accurate estimation in both time-delay and Doppler shift. Finally, the method is also verified by the simulation examples.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第9期1567-1570,共4页
Acta Electronica Sinica
基金
国家自然科学基金重点项目(No.60232010)
高等学校优秀青年教师教学科研奖励计划资助
