采用CMFB及WPT技术的信号检测方法

Signal Detection Methods with CMFB and WPT Techniques

针对目前电网信号检测技术的局限性 ,介绍了基于完全重构余弦调制滤波器组及紧支撑正交小波包变换理论的电网信号检测方案 ,并将传统的基于离散Fourier变换的检测技术与这两种新方法作了比较 。

Two new methods for power system signal detection are introduced to overcome the limitation of conventional techniques,which are based on cosine modulated filter bank with perfect reconstruction and compactly supported orthogonal wavelet packet transform.The new methods are compared with that of discrete Fourier transform.The results show that the CMFB and WPT signal detection techniques are more predominant over FFT at some aspects,such as resolution,leakage and transient.Referable theoretical bases are provided for accurate detection of power system signal.