基于分数阶傅立叶变换估计径向加速度算法研究  

A Method to Estimate Radial Parameters of Target Based on FRFT

作　　者：杜文超[1,2] 王国宏[1] 孟小芬[3] 

机构地区：[1]海军航空工程学院信息融合技术研究所,烟台264001 [2]海军装备部天津军事代表局,北京100076 [3]海军装备研究院信息工程研究所,北京102249

出　　处：《信号处理》2009年第3期472-477,共6页Journal of Signal Processing

基　　金：国家自然科学基金资助项目(批准号:60541001);“泰山学者”建设工程专项经费资助

摘　　要：雷达-目标径向加速度是表征雷达和目标相对运动关系的重要特征,对机动目标跟踪、识别等有重要意义。为从雷达回波信号中估计径向加速度,本文采用分数阶傅立叶变换对该问题进行研究,推导出加速度估计公式,给出加速度估计流程。分析对比了用于估计chirp信号参数时分数傅立叶变换方法与WVD-HT方法在抗噪声干扰能力上的差别,推导了加速度测量精度与角度搜索步长的关系,最后进行了仿真验证,仿真结果证实了该算法的有效性。Radial acceleration of radar target and its velocity are characteristic of relative motion relation between radar and target. They are of significance for maneuvering target recognition and tracking. In this paper, the Fractional Fourier Transformation （ FR- FT） was used to study the question. Differences in antinoise interference capability between FRET, WVD-HT in estimating parameters of chirp signal were analyzed. Then the relation between measuring accuracy of acceleration and angle search step was deduced, and simulations were made, proving that the method is more effective than former methods.

关 键 词：径向加速度 雷达回波 分数傅立叶变换 

分 类 号：TN957.51[电子电信—信号与信息处理]