|
|
THE METHODS OF EXTRACTING SIGNAL ENVELOPE——FROM HILBERT TRANSFORM TO WAVELET TRANSFORM |
Zhang Xusheng①; Zhu Yisheng①; Cheng Xiaoxiong②; Cheng Yuming① |
Shanghai Jiaotong University,Shanghai 200030 |
|
|
Abstract The principles, properties of Hilbert transform and wavelet transform and their applications to extracting signal envelope are discussed respectively. Some comparisons are made to illustrate that modulated Gaussian wavelet transform not only can orthogonalize signal, but also has band-pass filtering function, so it is a more ideal method for extracting signal envelope in contrast with Hilbert transform.
|
Received: 04 April 1995
|
|
|
|
|
|
|
|