无线电引信海面及目标多普勒回波仿真分析

Spectrum Analysis of Sea Surface and Target Doppler Echo in Radio Fuze

频谱识别技术利用海面及目标回波的多普勒频差来滤除海杂波信号。为准确分析弹目交会时引信回波的多普勒频谱,采用了三维弹目交会模型对弹目不共面时引信回波进行模拟,利用等多普勒线划分海面区域进而计算海面回波多普勒频率,利用目标不同散射点合成的方法推导了目标回波多普勒频率的表达式,并在弹目飞行速率、弹目交会角及目标脱靶量等因素不同时对引信回波多普勒频率进行仿真,通过仿真分析得出了以上因素对引信回波多普勒频率的影响,并验证了频谱识别技术在不同交会条件下的有效性。

The spectrum identification technology uses the Doppler frequency difference between the sea surface and the target echo to filter the sea clutter. In order to analyze the Doppler frequency of the fuze echo in missile-target encounter,a three-dimensional missile-target engagement model was used to simulate fuze echo. The sea surface was divided by the equi-Dopp Ier line and the expression of the Doppler frequency of sea surface was derived. And target Doppler frequency was derived by the method of synthesizing different scattering points. The Doppler frequency of fuze echo under different missile-target engagement condition, that included velocity, intersection angle and miss distance, were simulated and analyzed. The accuracy of spectrum recognition technology was verified by simulation.