基于高阶循环累积量的SQAM信号调制识别算法  

Robust Modulation Classification Algorithm Based on Higher-Order Cyclic Cumulants for SQAM Signals with Frequency Offset

作　　者：冯祥[1] 李建东[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室,西安710071

出　　处：《电子与信息学报》2007年第1期125-128,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金;微软亚洲研究院联合资助项目(60372048);国家自然科学基金重大项目(60496316);高等学校优秀青年教师教学科研奖励计划;教育部科学技术研究重点项目(104171);国家863计划重大课题(2005AA123910)资助课题

摘　　要：该文利用通信信号的循环平稳特性,在循环累积量域内构造信号分类特征,提出了一种基于高阶循环累积量的调制识别算法,实现对SQAM信号分类。算法对载波频率偏差、时延和相位旋转具有稳健性,并可在多信号环境且存在载波频偏的情况下实现对感兴趣信号的识别。理论分析和仿真结果均证明了算法的正确性和有效性。An algorithm based on higher-order cyclic eumulants for the automatic classification of SQAM signals is proposed. The algorithm utilizes the cyclostationary property of communication signals and presents classification feature in cyclic cumulants domain. It is robust to the presence of carrier frequency offsets, time delay and phase offsets. Interesting signals can also be classified under the presence of interference signals and carrier frequency offsets. The efficiency of the proposed classification algorithm is verified via theoretical analysis and extensive simulations.

关 键 词：调制识别 高阶循环累积量 循环平稳性 SQAM 

分 类 号：TN911[电子电信—通信与信息系统]