伪随机脉位调制与单极性伪码调相复合体制引信

伪码调相引信抗干扰能力较差，伪随机脉位调制与单极性伪码调相复合引信是伪码复合体制引信发展的一个重要方向，有必要对该体制引信进行研究。首先给出了伪随机脉位调制与单极性伪码调相复合引信的数学模型，得出了相应的模糊函数、绘制了模糊图的中心部分，接着设计了基于FPGA／CPLD的系统实现原理框图，论证了单极性伪码应用及二次混频法抑制多普勒频率两个关键技术的可行性，并简单介绍了数字相关的思想及其实施。研究表明，该体制引信有良好的整体性能和现实的工程应用前景。

Pseudo Random Pulse Position Modulation and Unipolar Pseudo Random Coded Phase-modulation Combined Fuze

The pseudo-random code phase modulation fuze has inferior performance in antijaming, and pseudo random pulse modulation and pseudo random coded phase-modulation combined fuze is one of the most important developing aspects in the future, so it is necessary to study this combined fuze . The math model was given firstly, then its ambiguity function was calculated , ploted and analysised . And then the block diagram of principle based on FPGA/CPLD was designed. Three key technologies including the application of unipolar pseudo random coded, the doppler exicision method of mixing twice and the idea of digital correlation were illustrated in the end. The results show that the combined system fuze has superior general performance and realistic feasibility of engineering application.