摘要
提出了一种基于谱特征的通信信号调制方式自动识别新方案,该方案直接从信号功率谱、平方谱和四次方谱中提取一组顽健性强的特征参数,在不需要先验知识的情况下对卫星信道中常用调制方式的信号进行自动识别。仿真结果表明,在信噪比大于5dB时其总体识别率达98%以上。该方案具有实用性和可行性。
A novel recognition scheme based on the spectrum feature analysis is proposed. A set of robust feature parameters are extracted from signal power spectrum and the power spectrum of the second and fourth power of signal. The proposed scheme can recognize many common used modulated signals in the satellite channel without any prior knowledge. Simulation results show that the scheme can achieve more than 98% recognition accuracy when SNR is above 5dB. This method is feasible and practical.
出处
《通信学报》
EI
CSCD
北大核心
2004年第1期140-149,共10页
Journal on Communications
基金
清华大学"九八五"基金资助项目
卫星应用预先研究基金资助项目
