A Study on Restraining Doppler Frequency of LFM Fuze

Firstly,the fundamental of continuous wave linear frequency-modulation(CW-LFM)fuze is discussed.Then frequency-time curve is analyzed and the relation expression of Doppler frequency and range error is deduced;On this basis,a method that eliminates Doppler frequency is put forward,which can not only improve the ranging precision greatly,but also measure target radial velocity accurately.The output signals of the important parts in the fuze improved is analyzed also.Theoretically the improved method solves the problem that Doppler frequency affects the ranging precision of CW-LFM fuze.