太赫兹科学与电子信息学报2018，Vol.16Issue(1)：143-147,5.DOI:10.11805/TKYDA201801.0143
提取循环平稳信号特征频率的方法
Methods for extracting characteristics frequency of cycle stationary signal
摘要
Abstract
The low order cyclic statistics is widely applied with good results, but it has poor effect of noise suppression. The high-order cyclic statistics can suppress Gaussian noise, handle the cyclostationary, nonlinear and non-Gaussian process, but it has very large amount of calculation. Cyclic autocorrelation slice function can extract modulation frequency from the spectrum, but the effect is not obvious under large noise interference. In order to extract the characteristic frequency of cyclostationary signal in a lower Signal-to-Noise Ratio(SNR) and a more rapid calculation speed, carrier frequency slice spectrum of cyclic bispectrum method is adopted to extract the required frequencies. After simulation in Matlab and experimental research, it is found that the carrier frequency slice spectrum of cyclic bispectrum can still be expressed intuitively when the SNR is -15 dB.关键词
循环双谱/载波频率/切片谱/循环平稳信号Key words
cyclic bispectrum/carrier frequency/slice spectrum/cycle stationary signal分类
信息技术与安全科学引用本文复制引用
文代琼,刘增力..提取循环平稳信号特征频率的方法[J].太赫兹科学与电子信息学报,2018,16(1):143-147,5.基金项目
四川省教育厅科研基金资助项目(17ZB0492) （17ZB0492）
