Abstract
In this work Discrete Fourier Transform (DFT) and Discrete Wavelet Transform (DWT) were experimentally evaluated for their performances as tools for dimensionality reduction in a real data set of air traffic trajectories. Results showed that both DFT and DWT were able to provide very expressive reduction for trajectory representation with minimal loss of information. Overall, DWT performed slightly better requiring fewer coefficients than DFT to achieve the same signal energy or to provide the same quality of reconstruction of the trajectories.
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