有频偏的星座图恢复和匹配

Constellation recovery and match with frequency offset

提出一种调制识别算法。首先利用载波相位跟踪盲分离算法估计载波频偏,以消除其对星座图恢复和匹配的影响。然后通过样本与核的相似性度量的动态聚类来恢复信号星座图,利用准最大似然分类准则,完成重构星座图与预期星座图的匹配。在存在频偏的情况下,仿真表明该算法的有效性。

An algorithm of modulation classification is proposed. First, it utilizes blind source separation to estimate frequency offset in order to mitigate the effect of frequency offset in constellation recovery and match. Then constellation is recovered by dynamic clustering based on similar measurement between samples and kernels and matched by quasi maximum likelihood rule. The algorithm is demonstrated by computer simulation.