✦ LIBER ✦
Ocean wave heave time series as the sum of nonharmonic sinusoids
✍ Scribed by K.E. Steele
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 359 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0029-8018
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✦ Synopsis
A discrete wave displacement time-series record is usually analyzed by a Discrete Fourier Transform (DFT), which represents the record as the sum of a finite number of harmonic sinusoids. When the dominant sinusoid of the record is not one of these harmonics, DFT "leakage" produces a distorted picture of the dominant wave, particularly for records not much longer than the largest period in the record. This paper proposes a non-Fourier method for determining the dominant wave period that is applicable even when the record is short relative to the largest period present in the record.