伪码调相与正弦调频复合调制脉冲串引信

Pseudo-random Binary-phase Coded and Sine Frequency Modulated Pulse Train Fuze

提出了伪码调相与正弦调频复合脉冲串引信,给出了复合信号形式,根据其频谱函数的特点,提出了利用复合脉冲信号的边带功率,通过二次混频得到视频(伪码)信号的方法,即第一次混频滤除载波,边带提取和第二次混频滤除正弦调频信号,从而得到含多普勒信息的伪码信号。给出了复合脉冲串引信实现的原理框图,详细阐述了其实现原理,推导了各个阶段的信号形式,最后分析了复合引信距离/速度分辨率,模糊特性和距离截止特性。结果证明这种复合引信具有优越的性能,尤其是具有极强的抗干扰能力。

A new combined signal-pseudo-random binary-phase ceded and sine frequency modulated pulse train signal is proposed. According to the characteristics of frequency spectrum function, the pseudo-random signal can be obtained through the side band power by the second time frequency mixing, i.e. , the first frequency mixer filters the carrier wave and side band power extraction and the second time frequency mixer fdters out the sine frequency modulation signal. The working principle of combined pulse train fuze is described in detail and the formulas of signals in each stage is derived. Finally, the range/speed resolution, ambignity characteristics and range cut-off characteristic are studied. Result shows that the new combined fuze has excellent performance, especially excellent anti - jamming capacity.