摘要
系统的总结了时频分析的原理,对常用信号时频分析方法进行了对比研究。谱分解的算法主要研究了Hilbert变换、S-变换、小波变换、Gabor变换、HHT、匹配追踪等。系统的介绍了每种方法的原理,理论上的优势和短处。做了详细的模拟信号对比试验,从不同的侧面展示每种方法得到频谱图,对比总结。较为直观的,全面的应用。通过反复调试,验证每个参数在时、频域中不同的作用。
The principle of time-frequency Analysis is elaborated detailedly , The common methods of time-frequency analysis are comparatively analyzed. The algorithms of spectral decomposition are studied , including Hilbert transform, S-transform, wavelet transform, Gabor transform, HHT, and matching pursuit, etc. The principles, advantages and shortcomings of each method are introduced in details. Contrast tests of analog signals have been done , Every frequency spectrum image is showed from different sides. The functions of every parameter in time and frequency domains are verified through debugging.
出处
《防灾减灾学报》
2014年第1期91-95,共5页
Journal of Disaster Prevention And Reduction
基金
区域地震前兆台站运行状态监控平台(XH13006Y)
关键词
谱分解
HILBERT变换
S-变换
小波变换
匹配追踪
spectral decomposition
Hilbert transform
S-transform
wavelet transform
matching pursuit
