伪码引信瞄准式压制性干扰及硬件实现

伪随机码调相引信在舰空导弹和地空导弹中有广泛的应用,因此有必要对此类引信的干扰进行研究。提出了一种瞄准式压制性干扰方案。该方案中,干扰机先接收引信的辐射信号,然后对准引信工作频率,发射一个可与引信工作带宽相比拟的窄带噪声或类似噪声的干扰信号去干扰引信,使引信自身的相关接收失效,从而达到干扰引信工作的目的。给出了此方案的部分实现电路的工作原理和硬件实现,主要包括伪码调相信号的解调、解调后的码元整形和识别、低频噪声源的产生、干扰波形的调制发射等关键部件。根据各部分电路的试验结果认为,提出的干扰机设计原理正确,干扰方案有效可行。

Jamming of Collimating and Suppressing of Pseudo-random Phase-modulation Fuze and Hardware Implemented Circuit

It's necessary to study the jam of pseudo-random code phase-modulation fuze which is applied widely in aeronautical missile and SAM. The scheme of collimating and suppressing jammer was put forward in the paper. For this jammer, it received the radiant signal from fuze, got the carrier frequency of fuze and then transmitted a jamming signal which was narrow-band noise or pseudo noise analogous to the working bandwidth of fuze. The correlation detection of fuze itself was disabled by this kind of jamming and the fuze was jammed successfully. The working principles and hardware implementation of each part circuits of the scheme were given in the paper. The circuits included mainly the demodulation of pseudo-|random code phase-|modulation signal, shaping and recognition of demodulated code, low frequency noise source, modulation and transmission of jamming waveform and so on. According to testing results of each part circuit, the design principle of jammer put forward is correct. The jamming scheme is effective and feasible.