摘要
文中针对旋转目标距离—多普勒(R-D)成像算法,讨论了它的理论依据,并着重分析了线形调频连续波(LFMCW)在旋转目标R-D成像算法中的应用,推导出差拍信号的表达式和利用二维快速傅立叶变换(2FFT)进行R-D处理的相关理论。介绍利用窗函数对采样信号进行加权处理抑制旁瓣电平的方法,通过MATLAB仿真,得出Hamming窗是对R-D成像算法较合适的窗函数。
In this paper,the theoretical basis for the R-D imaging algorithm is discussed.The application of Linear Fre- quency Modulated Continuous Wave(LFMCW)in the R-D imaging is mainly analyzed.Besides,the formulations of beat frequency signal as well as the corresponding theories for implementing the two-dimensional fast Fourier trans- form(2FFT)on the R-D process are achieved,Also.the paper introduces the method to constrain the side lobe level via using the weighting window function to process the sample signal data.Based on the simulation results obtained from MATLAB,it is observed that the Hamming window function is the most suitable window function for the R-D imaging algorithm.
出处
《弹箭与制导学报》
CSCD
北大核心
2005年第SC期753-755,758,共4页
Journal of Projectiles,Rockets,Missiles and Guidance
