摘要
提出了一种带限MPSK信号调制分类算法,对截获接收机输出的带限MPSK信号在未知载波频率的情况下,通过对延迟乘积信号进行分析处理,利用小波变换提取其码元跳变点,进而得到与原信号调制类型一致的复基带信号序列。并利用此基带序列的高阶累积量构造分类特征不变量,在宽信噪比范围内实现了带限MPSK信号的调制分类。理论分析和实测信号处理证明了提出算法的有效性。
A new algorithm based on wavelet transform and cumulants is proposed for classification of bandlimited MPSK signals. This method analyzes the product of original signal and delayed signal to obtain baseband sequence without knowing carrier. Then cumulant invariants are used to classify bandlimited MPSK signals. The method can work with lower SNR. Theoretical analysis and practical signal processing justify the effectiveness of the new symbol rate estimation algorithm.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2004年第8期1015-1018,共4页
Systems Engineering and Electronics
基金
国防预研基金资助课题(41101030103)
关键词
通信对抗
调制分类
MPSK信号
高阶累积量
communication countermeasure
modulation classification
MPSK signals
cumulants
