摘要
根据信号的瞬时幅度、相位和频率提取幅度功率谱强度、非线性相位方差、瞬时频率统计直方图和频率分集等特征量 ,对 AM,FM,LSB,USB,2 ASK,2 FSK,ALE,LINK1 1等常用调制方式进行多参数联合判决。仿真结果表明 ,本文提出的判决方法 ,在低信噪比 ( 1 0 d B)时 ,对高斯信道和瑞利衰落信道仍有较高的识别率。
An algorithm is presented to recognize common modulations automatically in short wave communication. Amplitude spectrum intensity,variance of nonlinear phase,statistical histogram of instantaneous frequency and frequency sets are extracted based on instantaneous amplitude,phase and frequency, and combined together to classify the common modulations such as AM,FM,LSB,USB,2ASK,2FSK,ALE and LINK11, etc. Simulations show that the algorithm is very effective to Gauss white noise channel and Rayleigh fading channel, even with a low SNR of 10 dB. It′s of practical use.
出处
《数据采集与处理》
CSCD
2003年第1期27-31,共5页
Journal of Data Acquisition and Processing
关键词
短波通信
调制方式
自动识别
模板匹配
统计直方图
short wave communication
modulation type
automatic recognition
template matching
statistical histogram
