基于改进瞬时频率的PSK信号脉内特征提取  

Extraction of Phase-Coded Signal Intrapulse Characteristics Based on Improved Instant Frequency

作　　者：李平[1] 唐宏[1] 薛明[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：《上海航天》2012年第6期53-56,共4页Aerospace Shanghai

摘　　要：针对瞬时频率法提取相位编码信号脉内特征参数易受噪声影响的问题,提出了一种综合对称相关函数与瞬时频率法的新处理方法。利用信号的对称相关函数抑制噪声,对信号的瞬时自相关相位进行无模糊重构获得信号的瞬时频率,根据瞬时频率特征提取脉内特征参数。仿真结果验证了该方法的有效性。Aiming at the problem of the instant frequency method in extracting the intrapulse charecteristics of PSK signal could be influenced by noise, a novel method was proposed in this paper, which combined symmetrical correlation function and instant frequency method. The noise was reduced by uslng the signal＇s symmetrical correlation function, and the instant frequency was gained by non-ambiguity restoring the instant slef-correlation phase. Acorrding to the instant frequency characteristic, the intrapulse characteristic parameters were extracted. The simulation results showed that this method was validated.

关 键 词：瞬时频率 对称相关函数 相位编码 脉内特征 参数提取 

分 类 号：TN911.3[电子电信—通信与信息系统] TN957.51[电子电信—信息与通信工程]