Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
563400 | Signal Processing | 2006 | 6 Pages |
Abstract
We show that a stationary signal concept such as the Fourier transform (FT) can be linked to a time-varying (TV) concept such as linear TV filtering. In particular, we give a continuous-time and discrete-time linear TV filter interpretation to continuous-time FT and discrete Fourier transform (DFT), respectively. As a consequence, important variants such as warped DFT, DCT, DST also can be viewed as linear TV filtering operations. Extending these results, we show that short-time Fourier transform (STFT) can be viewed as a linear TV filterbank operation, thereby interpreting time-varying spectrum of a signal as the output of a linear TV filterbank.
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
Prasanta Kumar Ghosh, T.V. Sreenivas,