基于相位重构的相位编码信号脉内特征分析  

Analysis of the intrapulse characteristic of phase-coded signal based on phase restoral

作　　者：李平[1] 唐宏[1] 李哲[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800

出　　处：《航天电子对抗》2010年第3期30-33,共4页Aerospace Electronic Warfare

基　　金：国家自然科学基金(60736009)

摘　　要：基于希尔伯特变换,提出了一种相位编码信号相位无模糊重构的脉内特征分析方法。该方法一方面利用魏格纳-威利变换对信号进行降噪处理,改善了在低信噪比下相位编码信号脉内特征识别和提取能力;另一方面对重构相位进行多阶差分处理来提高识别精度。仿真结果验证了该方法的正确性和有效性。A novel intrapulse characteristic of phase-coded signal analysis method is proposed, which based on Hilbert demodulation. On the one hand, the additive noise embedded in the signal can be reduced by using the Wigner-Ville distribution, which can improve the intrapulse characteristic of PSK signal recognition and extraction ability;on the other hand,multistage difference to restoral phase is used to increase the recognition precision. The simulation results confirm that this method is accurate and effective.

关 键 词：魏格纳-威利变换 希尔伯特变换 相位重构 脉内特征 

分 类 号：TN971.1[电子电信—信号与信息处理]