基于循环谱的MPSK信号识别  

Modulation Classification of MPSK Modulated Signal Based on Spectral-correlation

作　　者：何为[1] 高峰 李跃波[1] 黄刘宏[1] 刘锋[1] 

机构地区：[1]总参工程兵科研三所,河南洛阳471023 [2]黑龙江省人防设计研究院,黑龙江哈尔滨150000

出　　处：《通信技术》2010年第10期17-19,共3页Communications Technology

摘　　要：多进制数字相位调制信号(MPSK)是一类载波受抑制的相位调制信号,它们具有相位连续,幅度恒定以及抗干扰性强的特性,在军用和民用通信的很多领域都有广泛的应用,研究分类该类信号具有重要的实际价值。在研究分析MPSK信号谱相关特性的基础上提出一种MPSK信号的子类识别算法,利用MPSK(M≥4)平方降阶的性质,提取出MPSK信号的循环谱在循环频率f=0截面的特征,并根据该特征分类完成调制识别。计算机仿真实验证明了该算法在信噪比高于5dB时调制识别率高于95%。MPSK is a phase modulation signal of suppressed carrier,with features including continuous phase,constant amplitude and strong anti-interference,is widely used in many fields of military and civilian communications.The study on this signal is of important practical value.This paper,based on analysis of MPSK spectral correlation properties,proposes an algorithm modulation classification of MPSK signal,which,by using square-lowing-rank property of MPSK signal,extracts the section features of MPSK signal circular spectrum at a circular frequency of f=0,and finally the modulation classification is realized.Computer simulation shows that,when the SNR（Signal Noise Ratio） is higher than 5dB,the modulation classification rate is higher than 95%.

关 键 词：多进制数字相位调制 谱相关 调制识别 

分 类 号：TN911.6[电子电信—通信与信息系统]