The Implementation of Number Envelope
Shu‐Lin Ma · Journal of Changchun University of Science and Technology · 2008
In this paper,the envelope of signal is extracted by Hilbert transform.The real part of analytic signal,which gotten by the Hilbert transform is itself.The imaginary part is its Hilbert transformation,and the amplitude is signal envel-ope.The envelope demodulated by Hilbert method is the envelope of signal absolute value,its demodulated amplitude re-presents the real envelope.