基于一阶循环均值算法的VHF频段信号调制分类识别方法研究  

Research on VHF Band Signal Modulation Classification and Recognition Methods Based on Algorithm of First-Order Cyclic Moment

作　　者：杨发权[1] 李赞[2] 罗中良[3] 

机构地区：[1]佛山科学技术学院,佛山528000 [2]西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安710071 [3]惠州学院,惠州516007

出　　处：《电信科学》2014年第2期76-81,共6页Telecommunications Science

基　　金：国家科技重大专项基金资助项目(No.2010ZX03006-002-04);国家自然科学基金资助项目(No.61072070);教育部基础科研业务费资助项目(No.72124338);陕西省自然科学基金重点资助项目(No.2012JZ8002);广东省科技计划基金资助项目(No.2011B010200030;No.2012B010100038)

摘　　要：针对现有调制识别算法在低信噪比环境条件下识别率较低的问题,首次提出一阶循环均值算法对VHF频段信号进行调制分类识别,识别率得到大幅度提高。在估测一阶循环频率系列对应的一阶循环均值的基础上,选择一阶循环均值绝对值超过设定的截止值所对应的一阶循环频率作为候选循环频率,再通过循环平稳测试决定选择候选循环频率数目,实现对信号的调制分类识别,在信噪比大于-6 dB时,分类识别率可达到98%以上。In view of the problem of modulation recognition algorithm existing about low recognition rate under environment condition of low SNR,the algorithm of first-order cyclic moment was first presented used in band signal of VHF modulation classification recognition.The first-order cycle frequencies at which estimated first-order cyclic moment magnitudes exceed the cut-off value were selected as candidate cycle frequencies based on estimation first-order cyclic moment at first-order cycle frequency series,then decided to choose the number of candidate cycle frequency by a cyclostationarity test to realize signal modulation classification recognition.The classification recognition rate can reach more than 98％ under condition of SNR is greater than-6 dB.

关 键 词：一阶循环频率 一阶循环均值绝对值 截止值 VHF频段 调制分类识别 

分 类 号：TN911.7[电子电信—通信与信息系统]