基于时频局域相关能量的时变信号分析

A time-varying signal analysis based on the local correlation of signal energy

提出了一种基于信号时、频局域相关能量的新的时－频信号分析方法，它有着较明确的物理意义．进一步的分析表明了它实际上是对Ｒｉｈａｃｚｅｋ分布的平滑．与Ｗｉｇｎｅｒ分布（ＷＤ）相比，它有效地消除了多分量信号的交叉项，并避免了ＷＤ的频率模糊现象，计算方法也更为简便．

A new time-frequency signal analysis method based on local correlation distribution of signal energy between time and frequency domains is proposed in this paper. It has an evident physical significace.A further analysis indicates that it is actually the smoothing pesudo-Rihaczek distribution(SPRD).Compared with Wigner distribution (WD), it deletes the crossterms among multicomponent signals and avoids the frequency alias problem. The computation is simpler,too. The computer simulation confirms the analysis results.