基于信号重构的伪随机跳频引信信号处理技术

针对多普勒失配引起的伪随机跳频引信定距精度差及工程实现难度大的问题,提出了一种基于信号重构的伪随机跳频引信信号处理方法.首先利用发射信号重构一组用于匹配滤波的本地参考信号,然后将这组信号分别与目标回波信号进行相干积累,当其中任一通道相关值超过预设门限时,即可判为定距成功.仿真实验结果表明,该算法能够对目标区域进行精确探测,有效地解决了伪随机跳频引信多普勒失配引起的定距精度差、虚警概率高等问题.

Signal Processing Technology of Pseudo-random Frequency Hopping Fuze Based on Signal Reconstruction

A new signal procession method for the pseudo-random frequency hopping( PRFH) fuze based on signal reconstruction was proposed in the study in order to solve the problem of poor fixed distance precision and difficult engineering implementation of the fuze. First,a set of local reference signals used for the matched filter were reconstructed by using the transmitted signal. Then the local reference signals were applied to coherent integrate with the target echo,respectively. When the correlation value of any channel exceeds the presupposed threshold,it could be taken as fixed distance successfully. The simulation results showed that the method could solve these problems causing by mismatched filter,such as detecting the target precisely,the poor fixed distance precision and the high false alarm probability.