摘要
变采样率处理技术是一种检测线性调频信号调制率有力的处理方法 ,但剩余多普勒对检测性能的影响十分严重。本文首先分析了变采样率处理技术的性能及剩余多普勒的影响 ,然后提出了一种基于模糊函数重构的方法 ,它可以完全消除剩余多普勒的影响 ,使变采样率处理技术获得理想的性能。最后将这种改进的变采样率处理技术用于机载合成孔径雷达的运动目标检测 ,给出了检测算法。
The proposed changeable sampling ratio processing technology (CSPT) is an effective technique to detect the ratio of modulation of chirp signal. But the remainder doppler frequency influences its performance seriously. In this paper, the performance of CSPT and the influence of remainder doppler frequency are firstly analyzed. Then a new algorithm is proposed to eliminate the remainder doppler frequency based entirely on the signal reconstruction from its ambiguity function. Then CSPT can achieve the ideal performance. Finally this method is applied to airborne synthetic aperture radar moving target detection and the detection scheme is given. The simulation results prove its effectiveness.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2002年第2期191-195,共5页
Acta Armamentarii
基金
国防科技重点实验室基金资助项目 (No.99JS0 1.4.1.DZ2 40 1)
关键词
合成孔径雷达
运动目标检测
变采样率处理
模糊函数
SAR
synthetic aperture radar, moving target detection, changeable sampling-ratio processing, ambiguity function
