摘要
在非 AWGN环境下 ,针对 CW,AM,FM,OOK,PSK,QPSK,16 QAM,FSK,MSK,SSB十种混合调制信号 ,对调制类型特征提取方法和自动识别算法进行了分析、综合、设计和计算机仿真。提出了梯层电平分析方法、频率瞬时信号分析、剔除载波的归一化能量分析、平方后信号的频谱分析、四次方后的信号频谱分析等方法。当 SNR=10 d B时 ,计算机仿真结果是正确识别率不低于 95 % ,自动识别的平均处理时间为不超过 10 s。
Under nonAWGN channel, aimed at CW, AM, FM, OOK, PSK, QPSK, 16QAM, FSK, MSK, SSB, the methods of characteristic extraction and the algorithm of automatic recognition of modulation schemes has been analyzed, synthesized, designed and simulation. A few methods have been proposed,such as stepped voltage level analysis, normalized carrierfree spectral energy analysis, squared signal and fourth powered signal analysis, etc.When SNR is equal to 10 dB, it is shown from simulation that, the correct recognition rate is not lower than 95% and the average recognition time is not more than 10 s.
出处
《现代电子技术》
2003年第18期18-21,共4页
Modern Electronics Technique
关键词
非AWGN环境
调制类型
特征提取
自动识别
信号频谱分析
混合调制信号
non-AWGN channel
characteristic extraction modulation schemes
algorithm of automatic recognition of modulation schemes
decision theory
