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.
出处
《上海航天》
2012年第6期53-56,共4页
Aerospace Shanghai
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
Instant frequency
Symmetrical correlation function
Phase coded
Intrapulse characteristics
Parameter extraction
