【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。更多还原

【Abstract】 The frequency resolution of traditional algorithm based on direct FFT is low,and the calculated amount of Zoom-FFT algorithm is so large that cannot meet the requirements of real-time calculation of Continuous Wave Doppler fuse.To solve that problem,aparameter 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.更多还原