摘要
提出一种新的循环累量不变量分类特征,来实现MPSK信号的调制样式分类。新分类特征只利用了码元速率的先验信息,对基带成型脉冲的形状具有稳健性;对MPSK基带信号的时移、载波相位误差、信号幅度变化具有不变性;并可抑制加性平稳噪声。利用循环时变累量的多信号选择性,所提出的分类特征可实现多信号分类识别,理论分析和计算机仿真结果都证实了分类算法的有效性。
A new invariants classification feature based on cyclic temporary cumulant is proposed for classification of MPSK signals. The new feature only uses the symbol rate information, which is resistant to shaping pulse and invariant with respect to the time-translation, local carrier phase offset and amplitude scale of the baseband MPSK signals, and can suppress stationary additive noise. The signal selectivity of cyclic temporary cumulants makes it possible for the proposed feature to be applied to modulation classification of multi-signals. Theoretial analysis and extensive computer simulations show the efficiency of the proposed classification algorithm.
出处
《电子与信息学报》
EI
CSCD
北大核心
2003年第3期320-325,共6页
Journal of Electronics & Information Technology
