数字卫星通信信号调制方式识别方法研究  

Recognion of modulation modes in digital satellite communication

作　　者：甘新泰 程伟[1] 胡登鹏[1] 杨瑞娟[1] 

机构地区：[1]空军预警学院,武汉430019

出　　处：《空军预警学院学报》2014年第2期111-115,共5页Journal of Air Force Early Warning Academy

基　　金：国家自然科学基金资助项目(61271451)

摘　　要：针对数字卫星常用的7种通信信号调制方式(QPSK、8PSK、16QAM、32QAM、64QAM、16APSK、32APSK),对零中心归一化瞬时幅度谱密度最大值、四次方谱、幅度、高阶累积量四种特征参数进行了分析,提出了一种联合特征参数的信号调制识别方法.该方法能有效地抑制高斯白噪声的影响,较好地解决了MAPSK信号低信噪比条件下调制识别率低的问题.仿真结果表明,与其他方法相比,本文方法无需先验知识,具有较高识别率.For the seven types of modulation modes commonly used in the digital satellite communication singles, including QPSK, 8PSK, 16QAM, 32QAM, 64QAM, 16APSK, 32APSK, this paper analyzes their four characteristic parameters including the maximum of instantaneous amplitude spectrum density normalized at the zero center, quartic power spectrum, amplitude, high-order cumulants, and proposes a method of signal modulation recognition with joint characteristic parameters. This proposed method could suppress effectively the Gaussian white noise and get over the low modulation recognition rate of MAPSK under the condition of lower SNR. Simulation results indicate that this method needs no priori knowledge and has a higher recognition rate, compared with other ones.

关 键 词：数字卫星信号 调制方式识别 特征参数 高阶累积量 

分 类 号：TN911[电子电信—通信与信息系统]