一种多进制频移键控信号的调制分类及解调方法  

On mudulation classification and demodulation of MFSK signals

作　　者：罗明[1] 杨绍全[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《西安电子科技大学学报》2005年第1期52-55,共4页Journal of Xidian University

基　　金：国家部委预研资助项目(41101030103)

摘　　要：提出了一种多进制频移键控(MFSK)信号调制分类及解调方法,选取截获接收机输出的MFSK信号的时频脊线作为分类特征,利用无监督聚类算法求取最佳聚类数M.利用时频脊线的Haar小波变换估计码元宽度,并且利用对应最佳聚类数的聚类中心确定抽判门限,通过对时频脊线抽样判决,实现了MFSK信号的解调.理论分析和对实际信号的处理结果证明了此算法的可行性.A new algorithm is proposed for classification and demodulation of MFSK signals. The ridge of time-frequency representation of MFSK signals is analyzed. Modulation classification is realized by using the unsupervised clustering algorithm to determine the optimal number of clusters. In order to demodulate MFSK signals, the Haar wavelet transform is used to estimate the code-width and the centers of optimal clusters are used to determine thresholds. Theoretical analysis and practical signal processing results justify the robusticity and the efficiency of the new classification and demodulation algorithm.

关 键 词：信号侦测 多进制频移键控信号 调制分类 模糊聚类 

分 类 号：TN911.72[电子电信—通信与信息系统]