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。对信号的小波谱以及与魏格纳-维尔分布之间的关系进行了较为详细地讨论。根据时频分析的理论,把小波谱扩展到了小波谱相关域,提出了小波谱相关分析方法,并应用到分形噪声和BPSK信号的分析上,探讨了它们的相应特性。根据探讨的结果,提出了分形噪声中BPSK信号检测的小波谱相关方法,并对讨论的结果进行了计算机仿真。
Wavelet transform as a new time-frequency analysis method,its wavelet spectra characterizes time-frequency character of signals.This paper first analyzes wavelet spectra and compares with Wigner-Ville distribution.Then based on time-frequency theory, expands wavelet spectra to correlation region and proposes method of wavelet spectral correlation.Last applicates wavelet spectral correlation method to detection of BPSK signals embedded in fractal noise.Computation simulations provide the results of discussion.
出处
《计算机工程与应用》
CSCD
北大核心
2009年第14期125-127,163,共4页
Computer Engineering and Applications
基金
安徽教育厅自然科学基金(No.KJ2007B001)
关键词
BPSK信号
分形噪声
谱相关
小波谱相关
BPSK signal
fractal noise
spectral correlation
wavelet spectral correlation
