摘要
小波变换作为一种新兴时频分析方法,其小波谱表征了信号的时频特性。文中对信号的小波谱进行了较为详细的讨论,并与魏格纳-维尔分布进行了比较。根据时频分析的理论,把小波谱扩展到了小波相关域分析,提出了信号的小波谱相关分析方法,并应用到分形信号的分析上,探讨了它的相应特性。对探讨的结果进行了仿真,给出了小波谱相关在信号检测中的应用前景。
Wavelet transform as a new time-frequency analysis method, its wavelet spectral characterized time-frequency character of a signal. Analyzed wavelet spectral detailedly and compared it with Wigner-Ville distribution. Based on time-frequency theory, wavelet spectral is expanded to wavelet correlation region, and method of wavelet spectral correlation is proposed. Last, wavelet spectral correlation of fractal signal is discussed and simulation experiments provide the results of discussion.
出处
《计算机技术与发展》
2008年第10期40-42,45,共4页
Computer Technology and Development
基金
安徽省自然科学基金(KJ2007B001)
安徽省教育厅青年教师基金(2005JQL117)
关键词
小波变换
小波谱
谱相关
分形信号
wavelet transform
wavelet spectral
spectral correlation
fraetal signal
