自调节移频参数的选带细化傅里叶算法  

A Self-adjusted Parameter Zoom FFT Method

作　　者：孙永泽 郭东敏[2] 王学敏[2] 权建峰[2] 

机构地区：[1]机电动态控制重点实验室,陕西西安710065 [2]西安机电信息技术研究所,陕西西安710065

出　　处：《探测与控制学报》2013年第4期17-20,26,共5页Journal of Detection & Control

摘　　要：针对直接快速傅立叶变换算法频率分辨率低而传统选带细化傅立叶算法(Zoom FFT)运算量大,难以满足连续波多普勒引信实时性要求的问题,提出了自调节移频参数的选带细化傅立叶变换的算法。该算法取消了原Zoom FFT算法的抗混叠滤波环节,通过自调节复调制移频参数细化回波信号的多普勒频带。仿真表明,该算法在较小运算量代价下提高了多普勒频率分析的分辨率。The frequency resolution of traditional algorithm based on direct FFI＂ is low, and the calculated a- mount of Zoom-FFT algorithm is so large that cannot meet the requirements of real-time calculation of Continu- ous Wave Doppler fuse. To solve that problem, a parameter self-adjusted Zoom-FFT algorithm was introduced in this paper. By adjusting the frequency shifting parameter of complex modulation, the Doppler frequency band of fuse wave signal was zoomed in. Simulation showed that the algorithm could improve the frequency resolution of frequency analysis on Doppler fuze with acceptable calculation cost.

关 键 词：连续波多普勒引信 频谱细化 选带细化傅里叶变换 复调制 实时信号处理 

分 类 号：TJ439[兵器科学与技术—火炮、自动武器与弹药工程]