摘要
对OFDM系统通常采用的MPSK/MQAM信号调制类型的自动识别进行了研究。设计了一种基于重建星座图的分类器,将样本集映射为若干个与调制阶数一一对应的具有单峰性质的子集,通过子集的个数和单峰中心位置判定调制阶数及其调制方式。仿真结果表明,该分类器能够有效地识别OFDM信号的调制类型。
This thesis studies the auto- recognition of MPSK/MQAM signals that the OFDM system usually adopts. A classifier based on rebuilding constellation is proposed in this paper. The classifier can map the sample collection to sub - collections whose number equal to modulation levels and peak number is only one. The modulation level and method can be decided by the number and the peak＇s location of sub - collections. This classifier could effectively distinguish the modulation type of OFDM signals by computer simulation.
出处
《现代电子技术》
2006年第3期42-44,共3页
Modern Electronics Technique
关键词
OFDM
星座图
调制分类
自动识别
OFDM
constellation picture
modulation classification
auto - recognition
