Abstract
Conventional frequency-domain window-leakage analysis accurately describes the leakage in the short-time Fourier transform only for stationary signals. Leakage in the time-frequency plane from concentrated transient or nonstationary signals can be effectively analyzed by use of a time-frequency window-leakage envelope with rectangular contours. This envelope is obtained from the Wigner distribution of the analysis window, with appropriate corrections for the sidelobe leakage. The time-frequency window-leakage envelope gives insight into the tradeoffs in time-frequency leakage between various windows and allows quick and accurate estimates of the leakage in the short-time Fourier transform. A simple technique for constructing signals with Wigner distributions that are linear transformations of the Wigner distribution of a known signal is developed. With this technique, windows with a variety of time-frequency orientations and leakage behavior can be developed.
Original language | English (US) |
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Pages (from-to) | 263-286 |
Number of pages | 24 |
Journal | Circuits, Systems, and Signal Processing |
Volume | 6 |
Issue number | 3 |
DOIs | |
State | Published - Sep 1987 |
Externally published | Yes |
ASJC Scopus subject areas
- Signal Processing
- Applied Mathematics