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RACINE(非等距脉冲相干雷达)方法,是为避免当发射等距及波形相同的脉冲信号时产生回波信号模糊而发展起来的。为了在发射非等距脉冲信号时消除杂乱回波及提供匹配滤波,已研制出新的信息处理机,这是鉴于快速傅利叶变换及惯用的数字滤波器在这方面已不起作用。经地面及机上测试证实了的理论分析结果表明,利用这种新方法能消除速度模糊,而付杂波能见度因数仍跟发射等距脉冲信号时一样。一个重要的结果是,不模糊径向速度相当于比平均脉冲重复频率高得多的多普勒频率。
The RACINE (non-equidistant pulse coherent radar) method is developed to avoid blurring of the echo signal when transmitting a pulse signal of equal and same waveform. In order to eliminate spurious echoes and provide matched filtering when transmitting non-equidistant pulse signals, new information processors have been developed in view of the fact that fast Fourier transforms and conventional digital filters have not worked in this regard. The theoretical analysis verified by ground and on-board tests shows that this new method can eliminate the ambiguity of velocity, while the clutter visibility factor is still the same as when transmitting equidistant pulse signals. An important result is that the unambiguous radial velocity corresponds to a much higher Doppler frequency than the average pulse repetition frequency.