Fast and memory-efficient algorithms for computing quadratic time–frequency distributions
| المؤلف | O'Toole, J.M. |
| المؤلف | Boashash, B |
| تاريخ الإتاحة | 2013-09-17T15:56:03Z |
| تاريخ النشر | 2013-09 |
| اسم المنشور | Applied and Computational Harmonic Analysis |
| المعرّف | http://dx.doi.org/10.1016/j.acha.2013.01.003 |
| الاقتباس | J.M. Oʼ Toole, B. Boashash, “Fast and memory-efficient algorithms for computing quadratic time–frequency distributions”, Applied and Computational Harmonic Analysis, Volume 35, Issue 2, September 2013, Pages 350-358 |
| الرقم المعياري الدولي للكتاب | 1063-5203 |
| الوصف | This paper presents algorithms that compute DTFDs with minimal computation and memory loads. (Additional details can be found in the comprehensive book on Time-Frequency Signal Analysis and Processing (see http://www.elsevier.com/locate/isbn/0080443354). In addition, the most recent upgrade of the original software package that calculates Time-Frequency Distributions and Instantaneous Frequency estimators can be downloaded from the web site: www.time-frequency.net. This was the first software developed in the field, and it was first released publicly in 1987 at the 1st ISSPA conference held in Brisbane, Australia, and then continuously updated). |
| الملخص | Algorithms for computing time–frequency distributions (TFDs) limit computation time by reducing numerical operations. But these fast algorithms do not reduce the memory load. This article presents four TFD algorithms to minimise both the computation and memory loads. Each algorithm is optimised for a specific kernel category. Three algorithms reduce memory by computing an exact TFD without oversampling; the fourth algorithm, for the nonseparable kernel, reduces memory by computing a decimated TFD. The separable-kernel algorithm, using a biomedical signal as an example, computes an exact TFD with only 12% of the computation load and 1% of the memory required by conventional algorithms. |
| اللغة | en |
| الناشر | Elsevier Inc |
| الموضوع | Algorithms Computational efficiency Fast Fourier transform Nonstationary signals Time–frequency analysis Time–frequency distribution Wigner–Ville distribution quadratic TFDs time-frequency signal processing |
| النوع | Article |
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