New Time-Frequency Distribution
Journal
Circuits, Systems, and Signal Processing
Journal Volume
14
Journal Issue
4
Pages
539-553
Date Issued
1995
Author(s)
Tsai, E.-J.
Abstract
Cross terms are an inherent consequence of the second order nature of Cohen's class TFDs (Time-Frequency Distributions) [5], [6]. They are manifest in a TFD of multicomponent signals as spurious artifacts arising from interactions between the various signal components, and they can often appear at times and/or frequencies inconsistent with the underlying physical nature of the signal, causing misinterpretation [2], [3], [4]. There are many time frequency distributions that avoid the cross term effect; the best are the Choi-Williams ED (Exponential Distribution) [1] and Levin's IPS (Instantaneous Power Spectrum) [9]. In this paper we combine the cross term reducing philosophy of the ED and IPS to obtain a new TFD that most effectively reduces the cross term effect. Surprisingly, the new TFD also satisfies most desired TFD properties. © 1995 Birkhäuser.
Other Subjects
Attenuation; Frequencies; Frequency domain analysis; Signal interference; Signal processing; Signal theory; Time domain analysis; Exponential distribution; Instantaneous power spectrum; Interference attenuation; Interference concentration; Time frequency distribution; Circuit theory
Type
journal article