基于周期模糊函数的伪码调相与正弦调频复合引信信号参数提取技术

Parameter Extraction Technique Based on Periodic Ambiguity for PRCPM-SFM Compound Fuze Signal

伪码调相与正弦调频(PRCPM-SFM)复合引信信号参数提取是实施引信欺骗性干扰的前提。针对噪声背景下的PRCPM-SFM复合引信信号,通过分析PRCPM-SFM复合引信信号的周期模糊函数,研究了利用周期模糊函数抑制噪声的机理,根据引信信号周期模糊函数的特点,设计了在模糊函数变换域的参数提取算法。仿真分析表明,该方法能有效提取出引信信号特征参数,具有较好的噪声抑制能力。

Feature parameter extraction of pseudo-random code phase modulation and sine frequency modulation （PRCPM-SFM） compound fuze signal is a precondition for deception jamming. The periodic ambiguity of PRCPM-SFM signal is analyzed for the PRCPM-SFM fuze detection signal in noise. The noise reduction mechanism based on periodic ambiguity is studied. Based on the characteristic of periodic ambiguity of fuze signal, the parameter extraction algorithm in ambiguity transform domain is designed. Simulation proves that the method can extract the feature parameters effectively and has good anti-noise ability.