Research Article
Discrete Wavelet Transform-based Approach of Real-time Wave Filtering for Dynamic Positioning of Marine Vessels
Table 5
Performance comparison between wavelet filtering and EKF.
| | Wave direction | Motions | EWF-wavelet (%) | EWF-EKF (%) | EWF-m (%) |
| Scaled | 180° | x | 0.407 | 1.300 | 12.269 | y | 0.021 | 0.075 | 0.176 | Heading | 0.089 | 0.300 | 3.954 | 135° | x | 0.111 | 0.652 | 4.489 | y | 0.004 | 0.031 | 0.222 | Heading | 0.044 | 0.271 | 2.392 |
| Full-scale | — | x | 0.318 | 0.611 | 4.953 | y | 0.447 | 0.958 | 5.210 | Heading | 0.217 | 0.314 | 1.658 |
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