基于小波包络差异性的数字调制方式识别技术  

The digital modulation recognition technique based on the wavelet envelope difference

作　　者：王兰勋[1] 郭淑婷[1] 贾层娟 

机构地区：[1]河北大学电子信息工程学院,河北保定071002

出　　处：《电子技术应用》2017年第2期95-98,共4页Application of Electronic Technique

摘　　要：针对通信系统中数字信号调制方式难以准确识别的问题,根据归一化前后小波变换包络的差异性,提出基于小波变异系数差值(ΔCV)和相似度特征的识别算法。该算法对MASK、MFSK、MPSK和MQAM 4种数字调制信号进行分类识别。理论分析和仿真实验表明算法简单易行,适用范围广,且在信噪比大于2 dB时数字调制信号识别率均在92.39%以上。Aiming at the problem that the digital signal modulation mode is difficult to be accurately identified in communication system,according to the digital signal wavelet amplitude difference between before and after the normalized,this paper puts forward a recognition algorithm based on the wavelet variation coefficient difference and similarity feature. Four kinds of digital modulation signals of MASK, MFSK, MPSK and MQAM are classified in this paper. Theoretical analysis and simulation experiment shows that the recognition method is simple,the application scope is wide and the digital modulation signal recognition rate is higher than 92.39% when SNR is larger than 2 dB.

关 键 词：调制识别 小波变换 变异系数差值 相似性度量函数 

分 类 号：TN911.3[电子电信—通信与信息系统]