摘要
分析了BPSK干扰对伪码引信相关输出的影响,分析发现当干扰强度超过引信抗干扰容限时,其相关输出严重恶化,因此必须采取相应措施对其进行抑制。考虑到BPSK干扰和有用信号之间存在着强的时频耦合,提出采用两次平方变换方法以实现干扰和有用信号的频谱分离,然后再通过传统滤波方法将有用信号提取出来。仿真结果表明该方法可以有效地消除干扰,使相关输出得到显著改善,尤其是对强干扰效果更佳。
The effect of BPSK interference on pseudo random coded fuze system is analyzed. It is found that the correlation output is deteriorated when the interference power is larger than the anti-interference limit of the fuze system. It is very necessary to excise the interference. Considering strong time and frequency coupling between the interference and useful signal, the method of twice square transformation is put forward to separate the interference and useful signal in frequency domain, and then the useful signal is extracted through traditional filtering. Simulation results show that this method can effectively excise noise frequency modulation interference and the correlation output is improved obviously, especially for the strong interference.
出处
《航天电子对抗》
2006年第3期50-53,共4页
Aerospace Electronic Warfare
关键词
伪码引信
BPSK干扰
相关输出
干扰抑制
平方变换
pseudo-random coded fuze system
BPSK interference
correlation output
interference excising
square transform
