脉冲无线电引信信号不能精确测频理论分析  

Theoretical Analysis for Carrier Frequency of Pulse Radio Fuse Signal that Can not Be Measured Accurately

作　　者：蓝太华[1] 熊波[1] 尚雅玲[1] 路明[1] 

机构地区：[1]海军航空工程学院,山东烟台264001

出　　处：《探测与控制学报》2010年第2期17-20,共4页Journal of Detection & Control

摘　　要：针对FFT对侦收的脉冲无线电引信信号载波频率可以精确测量的观点,提出脉冲无线电引信信号无法精确测频。因为调制前脉冲信号的带宽是无限宽的,载波调制后就会造成频谱混叠,通过FFT对侦收的脉冲无线电引信信号进行载波频率测量会产生较大的误差,远大于FFT最小频率分辨率。最后通过计算机仿真进行了验证。The view is put forward that the cartier frequency of pulse radio fuze signal can not be accurately measured by FFT. The band-width of pulse signal before modulation is infinite, so its frequency spectrum will be overlapping after modulation. Frequency measurement of pulse fuse signal by FFT will bring large error, which is much larger than the minimum frequency solution of FFT. Finally, this conclusion is tested by computer simulation.

关 键 词：脉冲信号 测频 FFT 频率分辨率 

分 类 号：TN971[电子电信—信号与信息处理]