基于循环谱和高阶累积量的联合模式识别方法  

A Combined Modulation Recognition Based on Cyclic Spectrum and High-order Cumulants

作　　者：陈泽艺[1] 

机构地区：[1]重庆邮电大学通信学院,重庆400065

出　　处：《电讯技术》2015年第3期328-332,共5页Telecommunication Engineering

摘　　要：为完全识别当前卫星通信采用的主要调制方式,结合循环谱和高阶累积量两种信号调制识别方法的特点,提出了一种联合识别算法。该算法将循环谱特征加入到高阶累积量识别法中,联合多种特征参数判决构建识别器,首先利用循环谱完成ASK、FSK、PSK信号的类间识别以及FSK信号的类内识别,在此基础上利用高阶累积量方法完成FSK、PSK信号的类内识别。仿真结果表明,该算法能够完全区分卫星通信中主要的调制模式{ASK、2ASK、2FSK、4FSK、BPSK、QPSK},在信噪比高于5 d B时识别率达88%以上。To solve the problem of satellite communication signal modulation mode recognition, a novel method based on the cyclic spectrum and high-order cumulants is proposed. In this method, the cyclic spectrum feature is added in the high-order cumulants method and many feature parameter dicisions are combined to construct identifier, cyclic spectrum is used to solve the classification problem of ASK, FSK, PSK and {2ASK,4ASK/modulation recognition firstly, then,higher-order cumulants method is adopted to realize class recognition of FSK, PSK modulation signal. Simulation results show that the algorithm can rec- ognize the main modulations t ASK, 2ASK, 2FSK, 4FSK, BPSK, QPSK t used by satellite communication and the average recognition rate is more than 88% when the signal-to-noise ratio（SNR） ≥5 dB.

关 键 词：卫星通信 调制识别 循环谱 高阶累积量 

分 类 号：TN911[电子电信—通信与信息系统]