低信噪比下相位编码信号脉内特征提取的新方法  

Extracting PSK Signal In-pulse Characteristics in Low SNR

作　　者：陈永超[1] 盖旭刚[2] 张广详 

机构地区：[1]空军雷达学院研究生管理大队 [2]空军驻京丰地区军事代表室 [3]93010部队

出　　处：《战术导弹技术》2011年第3期66-69,共4页Tactical Missile Technology

摘　　要：利用小波脊线法可以实现相位编码信号脉内特征的提取,但低信噪比下噪声幅度将淹没小波变换的尖峰,误差较大,严重影响识别效果.为改善低信噪比下相位编码信号脉内特征提取的准确性,提出一种基于小波分析去噪和小波脊线法相结合的改进算法,首先通过小波分析对相位编码信号进行去噪,改善信噪比,在此基础上再进行其脉内特征的提取.仿真结果证明该方法有效,具有一定的参考价值.Wavelet-ridge can be used for extracting PSK signal in-pulse characteristics, but in the case of low SNR, the amplitude of the noise will cover the peak of wavelet, which will result in error greatly af- fecting identification effect. In order to improve the accuracy of extracted in-pulse characteristics in low signal-to-noise ratio （SNR） , an algorithm based on wavelet de-noising and wavelet-ridge method is pro- posed. In this method, the PSK signal will be firstly de-noised through wavelet analysis to improve SNR before the extraction of its in-pulse characteristics. The simulation results show that the improved algorithm can be operated efficiently.

关 键 词：信噪比 小波去噪 小波脊线 脉内特征 

分 类 号：TN975[电子电信—信号与信息处理]